Amada ML-2550A Operation Manual
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Amada ML-2550A Operation Manual

Yag laser welder
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YAG LASER WELDER
ML-2550A/2551A
OPERATION MANUAL
AA06M0642E-37

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Summary of Contents for Amada ML-2550A

  • Page 1 YAG LASER WELDER ML-2550A/2551A OPERATION MANUAL AA06M0642E-37...

  • Page 2: How To Use This Document

    How to Use This Document ATTENTION In this manual, ML-2550A denotes ML-2550A and ML-2550A-CDRH; and ML-2551A, ML-2551A and ML-2551A-CDRH. Thank you for purchasing our YAG Laser Welder ML-2550A/2551A. This operation manual explains its method of operation and precautions for use.

  • Page 3: Table Of Contents

    3. Functions of the ML-2550A/2551A ........
  • Page 4 4. Commands ............151 ML-2550A/2551A...
  • Page 5 Available Output ........... . .208 ML-2550A/2551A...
  • Page 6 Index ............227 ML-2550A/2551A...

  • Page 7: For Use In Safety

    Both direct laser beams and scattered laser beams are highly dangerous. If the beam enters the eye directly, it can cause blindness. Never burn, destroy, cut, crush or chemically decompose the Laser. This product incorporates parts containing gallium arsenide (GaAs). ML-2550A/2551A...
  • Page 8 Those who use a pacemaker must not approach the Laser or walk around the welding shop while the Laser is in operation, without being permitted by his/her medical doctor. The Laser generates a magnetic field and has effects on the operation of the pacemaker while it is turned ON. ML-2550A/2551A...
  • Page 9 Surface flash and expulsion can burn the skin if they touch the skin. Keep a fire extinguisher nearby. Keep a fire extinguisher in the processing shop in case of fire. Maintain and inspect the Laser periodically. Maintain and inspect the Laser periodically, and repair any damage before starting operation. ML-2550A/2551A...

  • Page 10: Precautions For Handling

    * MPE: The maximum level of permissible exposure of the eyes or skin to laser beams. Abbreviation of Maximum Permissible Exposure. * For other information on managing laser equipment or the MPE level, refer to the following standards. CDRH Standards Part 1040 Sec. 1040.10 “Radiation safety standards for laser equipment” ML-2550A/2551A...

  • Page 11: For Transportation

    ⇒ When transporting, belt the Laser to fix and keep it horizontal. Adjuster Adjuster Fork 560 mm or more Figures below show example forking; insert the forks fully till the points appear from under the Laser. DON'T ML-2550A/2551A...
  • Page 12 1.5 times the Laser width including the cushion. When the belt is not long enough as shown, insert a board (plywood, angle plate, etc.) on the Laser not to hurt the top surface of the Laser. ML-2550A/2551A...
  • Page 13 Laser. ⇒ Insert pillows such as timber between the bottom of the Laser and floor to balance the Laser. For positioning the pillows, refer to that for the forks of lift truck. Pillows Floor ML-2550A/2551A...
  • Page 14 * The wall in the above Figures may be replaced with a plank or rod as far as it can support the Laser. ⇒ When it is expected that the Laser may bounce during transportation, belt the Laser longitudinally. ML-2550A/2551A...

  • Page 15: For Disposal

    Precautions for Handling For Disposal This product incorporates parts containing gallium arsenide (GaAs). At the time of disposal, separate it from general industrial waste or domestic waste and carry out the disposal in accordance with applicable laws and regulations. ML-2550A/2551A...

  • Page 16: Sticking Warning/Danger Labels

    CLEANING SOLENOID VALVE FILTER, TAKE CARE NOT TO SPLASH WATER. IF WATER ENTERS THE EQUIPMENT THROUGH VENTS, IT MAY CAUSE TROUBLE. P-00084-001 MANUFACTURED BY: AMADA WELD TECH CO.,LTD. 95-3 FUTATSUKA NODA-CITY CHIBA 278-0016 JAPAN MODEL No. SERIAL No. LABEL MFG:MONTH , YEAR...
  • Page 17 開口からレーザ放射が出る。 P-00377-001 注 意 BELT 荷上げﾍﾞﾙﾄは､左図のように ｷｬｽﾀｰとｱジｬｽﾀｰの間に HERE 通して下さい｡ MANUFACTURED BY: AMADA WELD TECH CO.,LTD. CAUTION 95-3 FUTATSUKA NODA-CITY CHIBA 278-0016 JAPAN BELT BETWEEN CASTERS MODEL No. AND ADJUSTERS AS SHOWN. SERIAL No. LABEL P-00027-001 (Also stuck on the reverse side)
  • Page 18 T U R N C L O C K W I S E T O S E C U R E T H E F I B E R O P T I C . GROOVE P- 1212 Inside of the top surface of the main unit (top surface of the branch unit cover) Inside of the front surface of the main unit (front surface of the cooling water tank) ML-2550A/2551A...

  • Page 21: Chapter 1 Overview Of The Yag Laser Welder

    When the output unit is provided with a CCD camera, cross lines are generally displayed on the monitor and the cross point of these cross lines is an irradiation point. In this laser, a red point appears on the workpiece when guide light is output. ML-2550A/2551A...

  • Page 22: Mechanism Of The Yag Laser

    3 optical fibers. Up to 4 deliveries are available for this laser equipment at timesharing. Common Laser Equipment Configuration Oscillator Power monitor Optical fiber YAG rod Input unit Mirror Output unit Excitation lamp Workpiece Power supply Cooler Beamsplitter Example of 3 deliveries ML-2550A/2551A...

  • Page 23: Functions Of The Ml-2550A/2551A

    3. Functions of the ML-2550A/2551A 3. Functions of the ML-2550A/2551A ⇒ Laser power feedback control and optional waveform control functions ■ The Laser can handle a wide variety of workpieces. Up to 32 different settings for weld schedules using waveform control are available.

  • Page 24: Product Composition

    Approx. 28 kg Checking the Packaged Products Make sure that all the packaged products are included. Package for main unit Product name Model No. Q’ty YAG Laser Welder ML-2550A/2551A Package for accessories Product name Model No. Q’ty Flashlamp MLD-0602 Flowtube for lamp...
  • Page 25 Main Unit, Optical Fiber, and Output Unit This product is used in combination with the optical fiber and output unit as shown below. Optical fiber x Output unit x Main unit x 1 Number of deliveries Number of deliveries Main unit Output unit Optical fiber ML-2550A/2551A...
  • Page 26 For details, refer to the Appendixes, "Specifications" on page 206. Output unit The output unit with the specification that you selected at the time of purchase is connected to the main unit. For details, refer to the Operation Manual or Specification for the output unit. ML-2550A/2551A...

  • Page 27: Options

    For the maintenance parts separately sold, refer to the Maintenance Part, Chapter 1 "1. Maintenance Parts and Standard Intervals of Inspection/ Replacement" on page 175. Fiber Scope This fiber scope is used to check the incident status to the optical fiber. Purchase it as required. P10× ML-2550A/2551A...
  • Page 28 When the printer (BL2-58SNWJC : SANEI ELECTRIC INC.) is connected by RS-485 cable, the output schedules of each schedule and measured values on the monitor screen can be printed out. Purchase the printer as required. Top side Rear side IF connector ML-2550A/2551A...

  • Page 29: Chapter 2 Name And Functions Of Each Section

    Used to open the front door. Press the button under the handle and the handle will pop out. After closing the door, put back the handle into place and the door will lock. (4) Water Level Viewing For viewing the cooling water level in the cooling water tank. Windows ML-2550A/2551A...

  • Page 30: Inside Of The Front Side

    When viewing the waveform of laser output, Connector connect to an oscilloscope. (5) RS-485 (1) Connects a personal computer or printer to use the external communication function. Connector (6) RS-485 (2) Connects a personal computer or printer to use the external communication function. Connector ML-2550A/2551A...
  • Page 31 Shows proper level of the secondary cooling water. Label (10) Ion-Exchanger Increases purity of the secondary cooling water. (11) Water Filter Removes fur and other contaminants from secondary cooling water. (12) Drains For draining water in the piping to prevent freeze. ML-2550A/2551A...

  • Page 32: Name And Function Of Each Section On The Top Side

    When the CONTROL keyswitch is turned ON with the MAIN SWITCH switch ON, this keyswitch is operable. When the laser is not used, turn Keyswitch OFF the CONTROL keyswitch and then pull out the key. The laser safety supervisor should take charge of the keyswitch. ML-2550A/2551A...

  • Page 33: Laser Controller (Mle-124A)

    When a high voltage is applied to the laser oscillator section, the (Lamp) EMISSION lamp comes on. (2) Liquid Crystal This is a touch panel type liquid crystal color display. Display This unit displays setting items, setting buttons, set values, monitor data, and windows and keyboard required for settings. ML-2550A/2551A...

  • Page 34: Laser Oscillator Section

    (7) (6) (5) (4) (10) (11) (12) Function of Each Laser Oscillator Section (1) Fixtures The yellow fixtures used to lock the laser oscillator to prevent any damage or dislocation during transportation. Be sure to remove these two fixtures before starting operations. ML-2550A/2551A...
  • Page 35 Connect the optical fiber to this unit. The Laser Beam Input Unit projects Input Unit a laser beam from the laser chamber into the optical fiber. Depending on (Up to 4 optional the specification, 1 to 4 laser beam input units are installed. deliveries) ML-2550A/2551A...

  • Page 36: Name And Function Of Each Section On The Lateral Side And Rear Side

    (5) Cooling Water For the primary cooling water. Outlet (6) Cooling Water For the primary cooling water. Intake (7) Cable Inlet This is a hole through which the cable (option) for mounting the optical fiber or detecting fiber breakage is passed. ML-2550A/2551A...

  • Page 39: Chapter 1 Installation

    In the installation place of this product, at least 500 mm of space is required in front, back, right, left and upper sides to cool the internal parts. Install the product in a place remote from the wall as shown in the figure on the next page. ML-2550A/2551A...

  • Page 40: Environment Suitable For Installation And Precautions

    Use the product in a place where the ambient temperature is 5 to 35ºC and the ambient humidity is 85%RH or less and yet a sudden temperature change does not occur. If the humidity is higher than values shown below, condensation may occur. Upper limit of ambient humidity Humidity (%) Ambient temperature (ºC) ML-2550A/2551A...
  • Page 41 YAG rod and the surface of the mirror, thereby sticking dust there. Avoid such a sudden temperature change if possible. When there is a possibility of condensation, turn ON the power supply of the laser. In about 2 hours, start to operate the laser. ML-2550A/2551A...

  • Page 42: Fixing The Laser Welder

    After the fixture is cleared, the laser oscillator is put to a floating status with a rubber legs. Slight vibrations are absorbed. However, take care not to give a strong shock. Top surface of the main unit (when the cover is open) Fixture Fixture At operation At delivery At delivery At operation ML-2550A/2551A...
  • Page 43 (2) Fix each adjuster on the floor by using a connecting apparatus such as anchor. Adjuster pressure fixtures (Fixing hole to floor) (74.5) Lock nut Fix on floor using anchor Adjuster bolt 19.5 Floor ⇒ The connecting apparatus is not attached as an accessory. Prepare it on the customer side. ML-2550A/2551A...

  • Page 44: Cooling Water

    Tap water, industrial water, ground water, or ultra pure water (16 MΩ·cm minimum resistivity) may cause corrosion or clogging, resulting in fault of the equipment. Laser chamber Secondary cooling water Cooling water tank Primary cooling water Pump Solenoid valve ML-2550A/2551A...

  • Page 45: Required Quantity Of Primary Cooling Water

    Total iron mgFe/L Up to 0.3 Total copper mgCu/L Up to 0.1 Sulfide ion Not to be detected Reference item Ammonium ion mgNH Up to 0.1 Residual chlorine mgCl/L Up to 0.3 Free carbon dioxide mgCO Up to 4.0 ML-2550A/2551A...

  • Page 47: Chapter 2 Connections And Preparations Of Each Section

    Size of crimp-on terminal 380 V AC 220 V AC Power input terminals Power input terminals UPPER LIMIT LOWER LIMIT Ｌ１ Ｌ２ Ｌ３ ＰＥ Ｌ１ Ｌ２ Ｌ３ ＰＥ EXT.I/ EXT.I/O(2) EXT.I/O(1) SIGNAL RS-485(1) RS-485(2) REMOTE INTERLOCK P-00083-001 Power cable Power cable ML-2550A/2551A...

  • Page 48: Connecting The Hose For Primary Cooling Water

    Connect the braided hose by using the attached hose band so that it may not be disconnected. (2) Connect the attached braided hose to the primary cooling water discharge port. Put one end of the hose into the drain port of the installation place. Primary cooling water drain port Primary cooling water supply port ML-2550A/2551A...

  • Page 49: Preparing The Secondary Cooling Water

    In this case, replenish cooling water again. Before feeding cooling water, be sure to take out the floating panel. When the front door is open Water level label Floating UPPER LIMIT panel LOWER LIMIT Cooling water tank Water filter ML-2550A/2551A...

  • Page 50: Connecting The Optical Fiber

    φ 0.3, 0.4mm 100mm φ 0.6mm 150mm φ 0.8mm 200mm φ 1.0mm 250mm ⇒ Do not tighten the ring of fiber plug too firmly; otherwise the incident laser beam may be dislocated. Tighten the ring by hand without using a tool. ML-2550A/2551A...
  • Page 51 Take care not to exceed these values when using the optical fiber. For single-delivery or timesharing The value becomes 1/2 at 2-powersharing, 1/3 at 3-powersharing, and 1/4 at 4-powersharing. Model ML-2550A ML-2551A Core dia. SI φ 0.3mm 50J, 200W SI φ...
  • Page 52 Turn the outer ring of the plug in the direction of arrow to fix. Groove (8) Install the branch unit cover and top cover as they were. (9) Return the control panel to the initial position and fix it. ML-2550A/2551A...
  • Page 53 The connector section cannot be bent. Take care not to give excessive force to this section. Output unit Approx. 40mm Optical fiber Connector section ⇒ Keep the recover cap in a clean place in custody. If a dirty cap is mounted again, this will cause seizure. ML-2550A/2551A...

  • Page 54: Connecting The Laser Controller Circuit Cable

    (2) Close the control panel and tighten the fix screws to fix the control panel as it was. (3) Remove the set screws for laser controller and slide the laser controller forward to remove it. Laser controller fixing screw Control panel fixing screws Pull toward you ML-2550A/2551A...
  • Page 55 5. Connecting the Laser Controller Circuit Cable (4) Connect the circuit cable to the laser controller and the Laser. Clamp the cable at the Laser with the cable clamp and clamp screw. Circuit cable Press and fix the cable with cable clamp ML-2550A/2551A...

  • Page 56: Connecting The External Communication Conversion Adapter (Option)

    (2) Connect the RS-232C cable to the RS-232C connector of the personal computer or the like through the "RS-232C/RS-485 conversion adapter." RS-485 Cable RS-232C/RS-485 conversion adapter UPPER LIMIT LOWER LIMIT EXT.I/ EXT.I/O(2) EXT.I/O(1) SIGNAL RS-485(1) RS-485(2) REMOTE RS-232C Cable INTERLOCK P-00083-001 Personal computer, etc. RS-485 (1) Connector RS-485 (2) Connector ML-2550A/2551A...

  • Page 59: Chapter 1 Control Method, And Start And Stop

    When the PLC or the like is connected to the main unit and pin No.23 (control switching) of the EXT.I/O (1) connector is turned ON (closed circuit), the control by external input/output signals (EXTERNAL CONTROL) is selected. ⇒ This control method cannot be selected by operating the laser controller or personal computer. ML-2550A/2551A...

  • Page 60: Start And Stop

    Operating Procedure (1) Turn OFF the high voltage. (2) Turn OFF the CONTROL keyswitch and pull out the key. (3) Turn OFF the MAIN SWITCH switch. ⇒ The laser safety supervisor takes charge of the key of the CONTROL keyswitch. ML-2550A/2551A...

  • Page 61: Chapter 2 Various Settings

    When each of the screen selecting buttons is pressed: SCHED STATUS SCHEDULE MONITOR STATUS Screen Screen Screen SEAM PASSWD PRINT PASSWORD PRINTOUT SEAM Screen Screen Screen When the power supply is turned ON with the CONTROL keyswitch OFF: MEMORY MEMORY SWITCH INITIALIZE SWITCH Screen Screen ML-2550A/2551A...
  • Page 62 When there are multiple input items, change the item by using the key. The input value is definitively set by pressing the key. Example: → → Numbers of the numeric keypad are pressed and then key is pressed. ML-2550A/2551A...
  • Page 63 At ON, the resonator shutter is opened and laser light can be output. At OFF, the resonator shutter is closed. With the resonator shutter closed, the flashlamp does not come on and no laser light is output. The set value (ON or OFF) is displayed at the button. ML-2550A/2551A...
  • Page 64 Select this button to set the password. PRINT When this button is pressed, the PRINTOUT screen appears. Select this button to print the set values of each SCHEDULE or the measured values of the MONITOR screen when an optional printer is connected. ML-2550A/2551A...
  • Page 65 100%). Regarding the actual laser output value ("FLASH1" to "FLASH3"), set the ratio (%) to the peak value supposing that the set peak value is the reference value (100%). <Note> The settable maximum peak value of laser output differs depending on the model. ML-2550A: 8.0 kW, ML-2551A: 5.0 kW ML-2550A/2551A...
  • Page 66 If the laser output value is set to 100%, the value set in "PEAK POWER" is selected. ML-2550A: The threshold value of PEAK is 8.0 kW. (The laser output value of FLASH is up to 100% when PEAK is set to 8.0 kW.) ML-2551A: The threshold value of PEAK is 5.0 kW.
  • Page 67 Sets the guide light blinking status (POSITION) or continuous lighting to ON or OFF. When POSITION BLINK is set to ON with the guide light ON, the guide light BLINK blinks. If it is set to OFF, the guide light is put into a continuous ON status. ML-2550A/2551A...
  • Page 68 Displays the product model and the software version of the main unit. PROGRAM UNIT Displays the product model and the software version of the laser controller. ⇒ For the common items in the upper/lower part of the screen, refer to page 63. ML-2550A/2551A...
  • Page 69 When the set value is exceeded, a screen to notify the approach of the flashlamp replacement time is displayed. ⇒ For the common items in the upper/lower part of the screen, refer to page 63. ML-2550A/2551A...
  • Page 70 When "REPEAT" is set to a value other than 0 and "SHOT" is set to 0, laser light is continuously output until a laser stop signal is input. Common to "SHOT" on the SCHEDULE screen. ⇒ For the common items in the upper/lower part of the screen, refer to page 63. ML-2550A/2551A...
  • Page 71 AC: Deletes all the entered characters. BS: Deletes a character in front of the cursor one by one. ENTER: Checks the entered password for correctness. ⇒ For the common items in the upper/lower part of the screen, refer to page 63. ML-2550A/2551A...
  • Page 72 PRINTOUT SCHEDULE. SEAM WELD Prints the set values on the SEAM screen by using the schedule number set by PRINTOUT SCHEDULE. ⇒ For the common items in the upper/lower part of the screen, refer to page 63. ML-2550A/2551A...
  • Page 73 Sets the time required for the guide light to go out automatically in the range of 01 to 98 minutes. This can be set in units of minute. AUTO-OFF When 00 is set, no guide light is output. When 99 is set, the guide light does not go out automatically. ML-2550A/2551A...
  • Page 74 Sets brightness of the liquid crystal display to HIGH, MIDDLE or LOW. CONTRAST BUZZER Sets the sound of buzzer during the touch panel operation to ON or OFF. At ON, the buzzer sounds. <Note> Even when the setting is OFF, the buzzer sounds if an error occurs. ML-2550A/2551A...
  • Page 75 SWITCH 1 is changed, the setting of No.8 of SWITCH 1 is returned to OFF. It takes about 15 seconds until initialization is completed. The POWER lamp blinks during that time. Turn off the power supply after blinking stops. ML-2550A/2551A...
  • Page 76 No. to be operated to ON. "1" to "4" of "SWITCH 4" are associated with branch shutters 1 to 4. Accordingly, set them to ON within the number of mounted branch shutters. 5 to 8 5, 6, 7, and 8: Unused. ML-2550A/2551A...
  • Page 77 4, 5, 6, 7, and 8: Unused. BACK Returns to the INITIALIZE screen. ⇒ When the setting of SWITCH 1 to SWITCH 6 has been changed, be sure to turn OFF the power to make the setting effective before use. ML-2550A/2551A...

  • Page 78: Setting Laser Light Output Schedules (Schedule Screen)

    (1) Press the "SCHED" button to display the SCHEDULE screen. (2) Press the "SCHEDULE" setting button. Enter the SCHEDULE number. (3) Press the "FORM" setting button to set "FIX." (4) Press the "PEAK POWER" setting button. Enter the laser output peak value. ML-2550A/2551A...
  • Page 79 <Note> The settable maximum peak value of laser output differs depending on the model. ML-2550A: 8.0 kW / ML-2551A: 5.0 kW (5) Press the laser output time "TIME [ms]" and laser output value "POWER [%]" setting buttons of "FLASH1" to "FLASH3."...
  • Page 80 In "REFERENCE VALUE", the forecast value of laser output energy based on the set output schedules is displayed. This value is a little different from the actually measured value (measured value displayed on the MONITOR screen) provided at laser welding. However, use it as reference. ML-2550A/2551A...
  • Page 81 <Note> The settable maximum peak value of laser output differs depending on the model. ML-2550A: 8.0 kW / ML-2551A: 5.0 kW (5) Press the laser output time "TIME [ms]" and laser output value "POWER [%]" setting buttons of "POINT 01" to "POINT 05."...
  • Page 82 In "REFERENCE VALUE", the forecast value of laser output energy based on the set output schedules is displayed. This value is a little different from the actually measured value (measured value displayed on the MONITOR screen) provided at laser welding. However, use it as reference. ML-2550A/2551A...

  • Page 83: Setting The Output Conditions For Seam Welding (Seam Screen)

    Setting the Fade-in/out Function (1) Press the "SHOT [COUNT]" setting button of "POINT 01." Enter the laser light output count. Set 0001 because of the first output count. ⇒ For "SHOT [COUNT]" of "POINT 01", only 0001 can be set. ML-2550A/2551A...
  • Page 84 Enabling the Fade Function (1) Press the "SEAM" setting button on the SCHEDULE screen to set it to ON. The fade-in/out function for seam welding is enabled. ⇒ When the fade-in/out function is not used, keep the "SEAM" setting button OFF. ML-2550A/2551A...
  • Page 85 For shots other than the shot output at 100.0%, no upper/lower limit judgment is performed and both Monitor Normal and Monitor Error are not output. Error No.56 OVERLIMIT OF LASER POWER and Error No.57 UNDERLIMIT OF LASER POWER are not displayed on the screen. ML-2550A/2551A...

  • Page 86: Setting The Output Status (Status Screen)

    Connect the main unit to the PLC or the like and turn ON pin No.23 (control switching) of the EXT.I/O (1) connector. Then, the control method is switched over to the control by external input/output signals (EXTERNAL CONTROL) and "EXTERNAL CONTROL" is displayed in "CONTROL DEVICE." ML-2550A/2551A...
  • Page 87 (2) Press the setting buttons for "SHUTTER 1" to "SHUTTER 4" to set the opening/ closing of the branch shutters to ON/OFF. (For single delivery specification) (3) Press the "CANCEL" button. The opening/closing of the branch shutter is set and the window is closed. ML-2550A/2551A...
  • Page 88 (appropriate number of laser light outputs) that are displayed on the MONITOR screen reaches the set number, a message is displayed. This function will be of assistance for maintenance or manufacturing control. (1) Press the "SHOT COUNT" or "GOOD COUNT" setting button of PRESET COUNT. Enter an optional output count. ML-2550A/2551A...
  • Page 89 When "GOOD COUNT" reaches the value set in PRESET COUNT, a screen to notify the number of good products is displayed. Press the "TROUBLE RESET" button to return the current screen to the initial screen. ML-2550A/2551A...
  • Page 90 - When the end face of the fiber is damaged, the lens of the connected input unit or output unit may be stained. Perform inspection and cleaning. When the input unit has been dismounted, a fiber incidence adjustment is required. ML-2550A/2551A...

  • Page 91: Setting The Output Status Check Screen (Monitor Screen)

    (1) Press the "HIGH" setting button. Enter the upper limit value. The upper limit value of allowable energy is registered. (2) Press the "LOW" setting button. Enter the lower limit value. The lower limit value of allowable energy is registered. ML-2550A/2551A...
  • Page 92 If the laser welder is used in the status where 80% or more is displayed in "LAMP INPUT POWER", the flashlamp replacement cycle may be shortened. The set ratio of the upper limit value is registered. When the upper limit value is exceeded, a screen to prompt the operator to replace the flashlamp is displayed. ML-2550A/2551A...
  • Page 93 The open circuit output state is also reset by turning on the power supply again. ML-2550A/2551A...

  • Page 94: Protecting Set Values (Password Screen)

    "REDS" is set as the initial value. To enter a new password after changing this password, enter "REDS." ⇒ The password to be entered must consist of 4 alphanumerical characters. (2) Press the ENTER key on the keyboard. When the entered password is correct, the new password setting screen is displayed. ML-2550A/2551A...
  • Page 95 The password is validated and a part of setting items is protected, disabling a change. ⇒ Unless "VALUE CHANGE" is set to OFF even if a password is set, the setting items are not protected, so that any person who does not know the password can change the setting values. ML-2550A/2551A...
  • Page 96 (3) Enter the same password and press the ENTER key. The set password is registered and the PASSWORD screen reappears. ⇒ Unless the two passwords coincide, the WRONG PASSWORD screen appears. Press the OK button and enter the same password. ML-2550A/2551A...
  • Page 97 REFERENCE SETTING (Upper limit value of lamp input power) The above setting items become unchangeable and the set values are protected. ⇒ To change any set value, enter the password to display the password setting screen and turn ON "VALUE CHANGE." ML-2550A/2551A...

  • Page 98: Switching The Accuracy Of The Measured Laser Energy Value (J) (Memory Switch Screen)

    (2) While the model name screen is displayed (for about 3 seconds), press the corners of the touch panel display in the order shown in the figure above. The INITIALIZE screen appears. ⇒ Unless the CONTROL keyswitch is OFF, the INITIALIZE screen is not displayed. ML-2550A/2551A...
  • Page 99 POWER lamp blinks during that time. Turn off the power supply after blinking stops. (2) Press the "BACK" button. The INITIALIZE screen reappears and the accuracy of the measured value on the MONITOR screen is switched. Setting example before switching ("6" of SWITCH 1: OFF) ML-2550A/2551A...
  • Page 100 Setting example after switching ("6" of SWITCH 1: ON) <No te> When No.6 of SWITCH 1 is set to ON, the settable maximum peak value of laser output "PEAK POWER" on the SCHEDULE screen becomes 1.0 kW regardless of the model. ML-2550A/2551A...

  • Page 101: Switching The Pulse Width Setting Range (Memory Switch Screen)

    (2) While the model name screen is displayed (for about 3 seconds), press the corners of the touch panel display in the order shown in the figure above. The INITIALIZE screen appears. ⇒ Unless the CONTROL keyswitch is OFF, the INITIALIZE screen is not displayed. ML-2550A/2551A...
  • Page 102 Turn off the power supply after blinking stops. (2) Press the "BACK" button. The INITIALIZE screen reappears and the setting range for pulse width on the SCHEDULE screen is switched. Setting example before switching ("7" of SWITCH 1: OFF) ML-2550A/2551A...
  • Page 103 On the FLEX screen, the screen is switched and displayed in the same way. <Note> The value of "FLASH1"+ "COOL1" + "FLASH2"+ "COOL2" + "FLASH3" is as follows after the setting of "7" of SWITCH 1. Setting Maximum value (ms) Minimum value (ms) Step (ms) 5.00 0.25 0.05 100.0 00.3 00.1 ML-2550A/2551A...

  • Page 104: Setting The Laser Light Delivery

    A selected branch shutter is opened, so that laser light is output as 100% energy without being split. The ML-2550A/2551A main unit is provided with a branch shutter with opening/ closing sensor and a timesharing unit according to the sharing specification. At delivery, a sharing method is initially set by the DIP switch of the main unit.
  • Page 105 For example, when branch shutter 2 is opened, laser light is output to the optical fiber connected to input unit 2. If an operation is performed to open two branch shutters or more, the branch shutter with a smaller No. has priority because two or more branch shutters are not opened. ML-2550A/2551A...
  • Page 106 Laser light Branch shutter 6 Branch shutter 5 Branch shutter 4 Branch shutter 3 Branch shutter 2 Branch shutter 1 Laser light is reflected on the beamsplitter by operated timesharing unit and transferred from opened branch shutter 1 to 6. ML-2550A/2551A...

  • Page 107: Operating Branch Shutters On The Status Screen

    1" is displayed for the single delivery specification. "SHUTTER 1" and "SHUTTER 2" are displayed for the 2 timesharing deliveries and 2-powersharing deliveries. "SHUTTER 1", "SHUTTER 2", and "SHUTTER 3" are displayed at 3-powersharing and 3-timesharing. (3) Press the "CANCEL" button to close the window. ML-2550A/2551A...

  • Page 108: Controlling Branch Shutters Independently

    Set No.8 to ON. The branch shutter independent control is set and the MEMORY SWITCH screen is displayed from the INITIALIZE screen. As a result, it is possible to set that only an optional branch shutter and timesharing unit can be operated. ML-2550A/2551A...
  • Page 109 For example, in the case of single delivery + 2-powersharing delivery, set ON by "SWITCH 4" and "SWITCH 5" as shown below. Then, laser light is output from branch shutter 1 as a single delivery and from branch shutter 2 and 3 as 2-powersharing delivery. ML-2550A/2551A...
  • Page 110 1 and 2 as 2-powersharing delivery and from branch shutter 3 as single delivery, depending on a difference in beamsplitter mounting condition. Timesharing Beamsplitter unit 100% 100% Laser light Beamsplitter Beamsplitter 100% Branch shutter 3 Branch shutter 2 Branch shutter 1 100% Single 2-powersharing ML-2550A/2551A...

  • Page 111: Changing The Acceptance Time For Laser Start Signal/Schedule Signal (Memory Switch Screen)

    Usually, the acceptance time for laser start signal is 16 ms but can be shortened as required. To change this setting, switch the ON/OFF states of No.2, 3, and 4 of "SWITCH 3" on the MEMORY SWITCH screen as shown below. Acceptance time No.2 No.3 No.4 0.1ms 16ms ML-2550A/2551A...
  • Page 112 The INITIALIZE screen appears. ⇒ Unless the CONTROL keyswitch is OFF, the INITIALIZE screen does not appear. (3) Press the "MEMORY SWITCH" button. The MEMORY SWITCH screen appears. ML-2550A/2551A...
  • Page 113 For example, to set the acceptance time to 4 ms, set "2" to OFF, "3" to "ON, and "4" to OFF. (2) Press the "BACK" button. The INITIALIZE screen reappears and the acceptance time for laser start signal and schedule signal is changed. ML-2550A/2551A...

  • Page 114: Setting The Function Of The Output Unit With Fiber Sensor (Option)

    Set the fiber breakage detecting side cover, raise the cover, function by SW2. and pull it out forward. Inside of the top surface of the main unit Set the LED ON checking function by SW1. Set the fiber mount checking function by SW2. ML-2550A/2551A...
  • Page 115 2: Checking that the fiber 2 HV-ON LED is ON. 3: Checking that the fiber 3 HV-ON LED is ON. 1: Checking that fiber 1 is mounted. 2: Checking that fiber 2 is mounted. 3: Checking that fiber 3 is mounted. ML-2550A/2551A...

  • Page 117: Chapter 3 Laser Welding By Laser Controller (Panel Control)

    POSITION: ON (guide light output) Screen SCHEDULE Screen SCHEDULE number input MONITOR Screen Pressing the LASER START/STOP button Laser light output MONITOR Laser energy/average power check Screen HV: OFF (High voltage OFF) CONTROL keyswitch OFF MAIN SWITCH switch OFF ML-2550A/2551A...

  • Page 118: Laser Controller Functions

    When the pressed button is turned in the (Button) direction of RESET (clockwise), the button is reset to the initial state. This button functions in the same way as the EMERGENCY STOP button of the main unit. ML-2550A/2551A...

  • Page 119: Operating Procedure

    The power supply is turned ON and the POWER lamp comes on. Then, the SELF-CHECK !! screen appears. The resonator shutter, timesharing unit, branch shutter, memory, and power supply unit are automatically checked. When no error is found, the KEYSWITCH !! screen is displayed. ML-2550A/2551A...
  • Page 120 Indicated at completion of warming-up. When "DEIONIZED WATER RES" is (READY), "WATER TEMPERATURE" is (NORMAL), and "LASER POWER MONITOR" is (READY), a high voltage is turned ON and charging is started. Then, the HV → ON !! screen appears. ML-2550A/2551A...
  • Page 121 When the registered SCHEDULE number is entered, the set output schedules are displayed. (3) Press the "PEAK POWER" setting button. Enter the laser output peak value by using the numeric keypad and then press the ENT key. In this example, set 5.00 kW. ML-2550A/2551A...
  • Page 122 The settable maximum peak value of laser output differs depending on the model. For the laser output value setting (% of FLASH), set a value not exceeding the maximum value of each model. ML-2550A: 8.0 kW ML-2551A: 5.0 kW (4) Press the "TIME [ms]" setting button of "FLASH1."...
  • Page 123 (1) Press the "STATUS" button to display the STATUS screen. When Pin No.23 (control switching) of the EXT.I/O (1) connector remains in an open state, external input signals are disabled and "PANEL CONTROL" is displayed in "CONTROL DEVICE." ML-2550A/2551A...
  • Page 124 Laser light is injected to the red-dot position. (8) Check the laser light irradiation position. If the point to be worked deviates from the red point of guide light, adjust the position by moving the output unit or workpiece. ML-2550A/2551A...
  • Page 125 (3) Turn OFF the MAIN SWITCH switch. The power supply is turned OFF and the POWER lamp goes out. ⇒ Return the key of the CONTROL keyswitch to the laser safety supervisor so that it can be kept in custody. ML-2550A/2551A...
  • Page 126 The average power (average value displayed on the MONITOR screen) should be 100 W or less per delivery. After the 300 W output is stopped for 2 seconds, the branch shutter should not receive any laser light for 18 seconds. Laser output per delivery (W) ML-2550A/2551A...

  • Page 127: Chapter 4 Laser Welding By External Input/ Output Signals (External Control)

    Switch the control method. Control by external input/output signals (EXTERNAL CONTROL) Output schedule input Resonator shutter opening/closing Branch shutter selection Guide light output High voltage ON Laser light output/stop End of operations (Emergency stop) CONTROL keyswitch OFF MAIN SWITCH switch OFF ML-2550A/2551A...

  • Page 128: Preparations For Operations

    The model numbers of plug and case are subject to change without notice. Depending on the part to be changed, the mounting screw shape may change and a necessary tool may be different. For the latest parts information, contact a nearest sales office. ML-2550A/2551A...

  • Page 129: Connector Functions

    (in) SCHEDULE 2 Output COM (in) SCHEDULE 4 Output COM (in) SCHEDULE 8 0V OUT (in) SCHEDULE 16 +24V OUT Input COM External signal source IN Input COM External signal COM Input COM HV-ON/OFF (in) Input COM TROUBLE RESET (in) ML-2550A/2551A...
  • Page 130 When this Pin 25–COM circuit is closed, laser beam input unit 1 is selected and the unit becomes ready to project a laser beam. BEAM SELECT 2 When this Pin 26–COM circuit is closed, laser beam input unit 2 is selected and the unit becomes ready to project a laser beam. ML-2550A/2551A...
  • Page 131 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ML-2550A/2551A...
  • Page 132 When the lamp input power exceeds the value set in "REFERENCE SETTING", the circuit is opened. Unused Do not connect anything. Unused Do not connect anything. Type of output: Photo MOS relay output Rating of output: 24 V DC, 20 mA max. ML-2550A/2551A...
  • Page 133 When the section between this pin and COM is put in a closed circuit, timesharing unit 3 is operated so that laser light can be output from input unit 3. Unused Do not connect anything. Unused Do not connect anything. Unused Do not connect anything. Unused Do not connect anything. ML-2550A/2551A...
  • Page 134 While timesharing unit 2 is operated, this Pin 9–COM circuit closes internally. Timesharing unit 3 ON While timesharing unit 3 is operated, this Pin 10–COM circuit closes internally. Unused Do not connect anything. Unused Do not connect anything. Unused Do not connect anything. Unused Do not connect anything. ML-2550A/2551A...
  • Page 135 No.6 (emergency stop output) is put in an open circuit and the emergency stop output status shown in the following figure is provided. EXT.I/O (3) Connector Inside of the laser Contact rating 30 V DC, 3 A ML-2550A/2551A...
  • Page 136 A multiple number of these interlocks may be connected in series as required. At delivery, the connector for short circuit is installed. Inside of the laser　　　　　　REMOTE INTERLOCK connector External interlock +24V 4.7k ML-2550A/2551A...

  • Page 137: Example Connections Of External Input Signals

    BEAM SELECT 3 BEAM SELECT 4 SCHEDULE 1 SCHEDULE 2 SCHEDULE 4 SCHEDULE 8 SCHEDULE 16 Input COM Input COM Input COM Input COM EXT.I/O (2) Connector D-Sub 25 pin TIMESHARING UNIT 1 TIMESHARING UNIT 2 TIMESHARING UNIT 3 ML-2550A/2551A...
  • Page 138 +24V OUT External signal source External signal COM Input COM When External Inputs are PNP Transistors 24V DC 0V OUT +24V OUT External signal source External signal COM Input COM When External Power Source is Supplied 24V DC 24V DC ML-2550A/2551A...

  • Page 139: Example Connection Of External Output Signals

    BRANCH SHUTTER 4 OPEN TIMESHARING UNIT 1 ON TIMESHARING UNIT 2 ON TIMESHARING UNIT 3 ON Type of output: Photo MOS relay output Rating of output: 24 V DC, 20 mA max. The polarity may be positive or negative. ML-2550A/2551A...

  • Page 140: Programming

    I/O (1) connector is put in a closed circuit to select Beam 1 and Beam 2. 50ms input The branch shutter is opened and the corresponding SHUTTER lamp comes on. End output 40ms or more ML-2550A/2551A Monitor normal 150ms or more output Laser start input 16.0ms or more...
  • Page 141 No.6 (Monitor trouble output) of the EXT.I/O (1) connector is put in a closed circuit for 40 ms and a signal is returned from the laser. Monitor normal output SCHEDULE 1 input SCHEDULE 2 16.0ms or more input 40ms or more Laser start input 16.0ms or more ML-2550A/2551A Output...
  • Page 142 (1) Put pin No.20 (Laser start) of the EXT.I/O (1) connector in a closed circuit. Laser output Laser light is output simultaneously from BEAM1 and BEAM2. ⇒ 50ms The details are the same as Step 6. End output ML-2550A/2551A Monitor normal/ abnormal output...
  • Page 143 Guide light can be seen as a red point. Laser light is irradiated to this red point position. (3) Check the laser light irradiation position. If the welding point deviates from the red point of guide light, move the output unit or workpiece to adjust the position. ML-2550A/2551A...

  • Page 145: Chapter 5 Laser Welding By External Communication Control (Rs-485 Control)

    Control method/SCHEDULE No./branch shutter settings Mirror setting for resonator shutter/timesharing unit Laser output start/stop Output status check Error No. display at occurrence of trouble End of operations Monitor value display High voltage OFF CONTROL keyswitch OFF MAIN SWITCH switch OFF ML-2550A/2551A...

  • Page 146: Preparations For Operations

    Prepare the program and its development environment for laser control on the customer side. ⇒ Connect the shielded portion to FG (frame ground) inside the laser equipment only when using the shielded cable. Do not use as SG (signal ground). ML-2550A/2551A...

  • Page 147: Initial Settings

    INITIALIZE screen by the laser controller of the equipment. Displaying the MEMORY SWITCH Screen (1) Turn OFF the CONTROL keyswitch and turn ON the MAIN SWITCH switch. Power is supplied and the POWER lamp comes on. The screen of model name appears. ①　　　　　③ ④　　　　　② ML-2550A/2551A...
  • Page 148 The INITIALIZE screen appears. ⇒ Unless the CONTROL keyswitch is OFF, the INITIALIZE screen does not appear. (3) Press the "MEMORY SWITCH" button. The MEMORY SWITCH screen is displayed. ML-2550A/2551A...

  • Page 149: Setting Equipment No

    For controlling multiple lasers by single personal computer, it is necessary to register equipment No. (NETWORK #) for each equipment. Set equipment No. without duplication. If duplication of equipment No. exists, a data collision will occur on the communication line and the laser cannot be correctly operated. ML-2550A/2551A...
  • Page 150 (1) Press the "NETWORK#" setting button. Enter the laser welder No. in the range of 00 to 15. ⇒ For details of each item on the INITIALIZE screen, refer to Chapter 2 "1. Setting Welding Schedules" on page 73. ML-2550A/2551A...

  • Page 151: Commands

    PC to laser Reading the timesharing unit status Laser to PC PC to laser Laser start The HV is OFF, the voltage command does not reach the specified Laser to PC value, trouble occurs, or external communication control is not performed. ML-2550A/2551A...
  • Page 152 PC to laser SHOT COUNT reset command External communication Laser to PC control is not performed. PC to laser GOOD COUNT reset command External communication Laser to PC control is not performed. PC to laser Reading trouble Laser to PC ..ML-2550A/2551A...

  • Page 153: Setting Data

    When the setting data is within the setting range, [ACK] is returned. When this data is out of the setting range, [NAK] is returned. This command is ACK or NAK effective only for external communication control. For the other control methods, [NAK] is returned. ML-2550A/2551A...

  • Page 154: Reading Data

    (Data No.1), (Data No.2), (Data No.3), ... (the last Data No.) Insert [,] between individual data. The Laser returns a [NAK] if the classification No., schedule No., or data No. ACK or NAK falls outside the specified range. ML-2550A/2551A...

  • Page 155: Settings For The Cooler (Set The Schedule No. [Sh1/Sh0] To 00.)

    Set waveform display on the [SCHEDULE] 0 – 1 screen 0: OFF 1: ON [PEAK POWER] on the [SCHEDULE] screen ML-2550A: 0000 – 0800 (×0.01kW) Laser output peak value ML-2551A: 0000 – 0500 (×0.01kW) [REPEAT] on the [SCHEDULE] screen 000 – 500...

  • Page 156: Schedule Settings For Flex, Time 01 To

    [POINT 16] TIME on the [SCHEDULE] screen 000 – 999 (×0.1ms/x0.01ms) [POINT 17] TIME on the [SCHEDULE] screen 000 – 999 (×0.1ms/x0.01ms) [POINT 18] TIME on the [SCHEDULE] screen 000 – 999 (×0.1ms/x0.01ms) [POINT 19] TIME on the [SCHEDULE] screen 000 – 999 (×0.1ms/x0.01ms) ML-2550A/2551A...

  • Page 157: Schedule Settings For Flex, Power 01 To

    Data No.11 is set to the same value for 86, 87, 88, and 89. 75 SEAM setting value SEAM ON/OFF Data No. Item Data Range [SEAM] on the [SCHEDULE] screen 0 − 1 Fade function ON/OFF 0: OFF 1: ON ML-2550A/2551A...

  • Page 158: Seam Setting Value Shot 01 To

    [POINT 07] POWER on the [SEAM] screen 0000 − 1500 (×0.1%) [POINT 08] POWER on the [SEAM] screen 0000 − 1500 (×0.1%) [POINT 09] POWER on the [SEAM] screen 0000 − 1500 (×0.1%) [POINT 10] POWER on the [SEAM] screen 0000 − 1500 (×0.1%) ML-2550A/2551A...

  • Page 159: Seam Setting Value Power 11 To

    Laser power monitor waveform data 2/5 0000 – 9999 (×0.1kW) Laser power monitor waveform data 3/5 0000 – 9999 (×0.1kW) Laser power monitor waveform data 4/5 0000 – 9999 (×0.1kW) Laser power monitor waveform data 5/5 0000 – 9999 (×0.1kW) ML-2550A/2551A...
  • Page 160 Since the number of data to be sent each time is limited to 5, it is necessary to change the classification No. according to the "number of waveform data of the laser power monitor" sent by "R00 nn 04" to perform repeated reading. ML-2550A/2551A...

  • Page 161: Setting The Control Method, Schedule No., Branch Shutter, Etc

    0: Control by laser controller At OFF 2: Control by external communication control 1: Control by external input/output signals (Output schedules are set on the laser controller.) At ON 5: Control by external input/output signals (Output schedules are set on the personal computer.) ML-2550A/2551A...

  • Page 162: Setting The Mirror Of The Timesharing Unit

    Timesharing unit 1 (0: OFF 1: ON □: Current status kept) Timesharing unit 2 (0: OFF 1: ON □: Current status kept) Timesharing unit 3 (0: OFF 1: ON □: Current status kept) Unused (fixed to □) Unused (fixed to □) ML-2550A/2551A...

  • Page 163: Reading The Control Method, Schedule No., Branch Shutter, Etc

    Automatic laser power monitor value transmission (0: OFF 1: ON) Each time the flashlamp comes on, "00 Laser Power Monitor-Energy, number of waveform data, etc." on page 159 is sent. READY status (0: Laser start disabled 1: Laser start enabled) ML-2550A/2551A...

  • Page 164: Reading The Timesharing Unit Status

    The Laser is not ready for use when: ACK or NAK • An alarm is activated. • HV is OFF. • The Laser is not charged to the set voltage. • The Laser is not in external communication control mode. ML-2550A/2551A...

  • Page 165: Stopping A Laser Light Output

    CH1/CH0 Equipment No. (CH1 = tens digit, CH0 = units digit) The Laser accepts the command only when in external communication ACK or NAK control (RS-485 CONTROL) mode. It returns a [NAK] when in any other control method. ML-2550A/2551A...

  • Page 166: Resetting The Appropriate Number Of Outputs

    Error No. (E1 = tens digit, E0 = units digit) All error numbers are transmitted. If no error has occurred, the error No. is to E1/E0 be [00]. For the contents corresponding to error No., refer to "Table of Error Contents" on page 167. ML-2550A/2551A...
  • Page 167 Caution - coolant resistivity Laser power above upper limit Laser power below lower limit Timesharing unit 1 fault Discharge unit overcurrent Timesharing unit 2 fault Discharge unit temperature error Timesharing unit 3 fault Discharge unit overpower error Branch cover open ML-2550A/2551A...

  • Page 169: Chapter 6 Printing Set Values And Measured Values

    (1) Press the "PRINT" button. The PRINTOUT screen appears. Specifying SCHEDULE (1) Press the "PRINTOUT SCHEDULE" setting button. Enter the SCHEDULE number of the output conditions to be printed by using the numeric keypad and then press the ENT key. ML-2550A/2551A...
  • Page 170 1. Printing Set Values Executing Printing (1) Press the "SCHEDULE" button. The output schedules of the specified SCHEDULE are printed. Example Example FORM:FIX (fixed waveform setting) FORM:FLEX (flexible waveform setting) ML-2550A/2551A...

  • Page 171: Printing Measured Values

    The measured values and output waveform that can be printed are only the previous laser output data. Measured values under other schedules cannot be printed in succession by specifying SCHEDULE No. Example Example FORM:FIX (fixed waveform setting) FORM:FLEX (flexible waveform setting) ML-2550A/2551A...

  • Page 172: Printing Set Values For Seam Welding

    Enter the SCHEDULE number of the output conditions to be printed by using the numeric keypad and then press the ENT key. Executing Printing (1) Press the "SEAM WELD" button. The setting values for seam welding are printed in the specified SCHEDULE number. Example of SEAM WELD (output conditions for seam welding) ML-2550A/2551A...

  • Page 175: Chapter 1 How To Perform Maintenance

    For the latest parts information, contact a nearest sales office. Operation Contents of Part name Model No. interval operation (standard) (*1) (*2) 1 million shots Flashlamp MLD-0602 Replace (*3) Every two Flowtube for lamp PC1205309 replacements Replace of lamp Ion-exchange resin refill MLF-0021 6 months Replace ML-2550A/2551A...
  • Page 176 Z-01981-001 3 years Replace O-ring for chamber cover G240 3 years Replace O-ring for rod holder P12.5 3 years Replace ML-2550A S-10 O-ring for rod 3 years Replace ML-2551A O-ring for electrode 3 years Replace Branch shutter (*6) A-03419-003 5 million times...
  • Page 177 We recommend a periodic inspection. *8: This operation interval provides guidelines based on 8 hours of operation per day. *9: The optical fiber may be damaged if it is used when dust or oil mist is attached on its end face. ML-2550A/2551A...

  • Page 178: Maintenance Of The Cooler Unit Section

    (5) Return the strainer into the Rear of the initial status and install the Laser diaphragm, spring, and upper part of the solenoid valve. Tighten the solenoid valve with the fixing screws (4 screws). Solenoid valve cover Pull out the solenoid valve ML-2550A/2551A...

  • Page 179: Draining Water From The Primary Cooling Water

    (2) Open the solenoid valve. Push and turn the A portion shown Solenoid valve at right to “Open” position with a blade-tip screwdriver. Open Normal Rear of the Laser Solenoid valve cover Pull out the solenoid valve ML-2550A/2551A...
  • Page 180 Put the A portion shown in the previous figure to the "Normal" status by turning it while pushing it with the screwdriver. (6) Return the solenoid valve cover. (7) Connect both of the cooling water inlet and outlet with a hose as shown. Hose band ML-2550A/2551A...

  • Page 181: Draining Water From The Secondary Cooling Water Tank

    (3) Pump out the tank. (4) Return the floating panel into the tank and install the tank lid as it was. The Laser front (With front door opened) Water level label UPPER LIMIT Floating panel LOWER LIMIT Cooling water tank Water filter ML-2550A/2551A...

  • Page 182: Changing The Ion-Exchange Resin And Replacing The Ion-Exchanger

    (3) Turn the ion-exchanger in the tank to the left with the replacing tool to remove it. ⇒ For changing with a new ion-exchange cartridge (with resin for change), proceed to Step 3. The Laser front (With front door opened) Gloves UPPER LIMIT LOWER LIMIT Replacing tool Ion-exchanger Ion-exchanger (screw type) ML-2550A/2551A...
  • Page 183 (dip) it into the cooling water tank. - Take care not to spill the ion-exchange resin. Wipe off the ion-exchange resin attached on the mouth of the ion-exchanger. ML-2550A/2551A...
  • Page 184 ⇒ If the ion-exchanger is used without the floating panel in the tank, the ion- exchange resin will be deteriorated more quickly. Be sure to put the floating panel into the tank. ML-2550A/2551A...

  • Page 185: Changing The Water Filter And Secondary Cooling Water

    Supplying the Secondary Cooling Water (1) Supply the cooling water, with the attached hand pump, till it reaches HIGH-line on the water level label. (2) Return the floating panel in the tank. Return the lid of the cooling water tank and secure it. ML-2550A/2551A...

  • Page 186: The Room Temperature At The Installation Place Goes Down Below 0ºc

    When removing the plug, press the release ring evenly and pull the plug straight toward you. If the ring is not pressed enough, the plug may not come out or the adapter and plug may be damaged, causing water leak. ML-2550A/2551A...
  • Page 187 ) or less from the hole of the removed tube to drain the remaining water from the tube. ⇒ For installing and removing the tube, refer to the next item. (4) After draining all the water, return the drain plugs and tubes. (5) Return and secure the left side cover. ML-2550A/2551A...
  • Page 188 Cut the tube to make its section new. Tube Release ring Adapter How to cut the tube Cut the tube laterally with a sharp cutter. ⇒ A broken or slant cross section of tube will hurt sealing, causing water leak. DON'T DON'T ML-2550A/2551A...

  • Page 189: Maintenance Of Laser Oscillator Section

    Reflector (Top portion) Interlock switch Lamp-replacing cover Remove screws on side, pull toward you. (3) Pull up the top part of the reflector to take it out. ⇒ Take care not to damage the internal surface of the reflector. ML-2550A/2551A...
  • Page 190 - Do not touch the glass portion of the flashlamp and glass portion of the flowtube directly with a hand or do not blemish it. The flashlamp will be damaged. Before installing the flashlamp, clean the glass portion of the lamp by using alcohol. ML-2550A/2551A...
  • Page 191 In the status shown in the following figure, compulsory force is given to the junction portion between the flashlamp and the cable, thereby causing damage to the lamp. 　　 DON'T DON'T ML-2550A/2551A...
  • Page 192 550 cN•m (55 kgf•cm) and the make sure that no leakage occurs. (4) Make sure that the laser welder can be normally operated and then turn OFF the power supply of the laser welder. (5) Install the lamp-replacing cover. ML-2550A/2551A...

  • Page 193: Making An Incident Beam Adjustment Of The Optical Fiber

    (1) Remove the optical fiber from the input unit or output unit. Optical fiber (2) Blow off foreign particles by using the air blow. If the foreign particles on the end face cannot be eliminated, wipe it lightly with the cleaning paper. Air blow ML-2550A/2551A...

  • Page 194: Cleaning The Optical Parts

    If these parts are wiped with force or disassembled, the position may be shifted and the laser welder may not be normally operated. Do not touch them. ⇒ For cleaning the optical parts, contact us for further information. ML-2550A/2551A...

  • Page 195: Maintenance Of The Power Supply Section

    Remove the screws of the side cover, raise the cover, and then pull it out forward. (3) Remove the battery on the CPU board and install a new battery instead. ⇒ Set the battery minding the polarity. Battery (4) Install the side cover. ML-2550A/2551A...

  • Page 196: Cleaning The Air Filter

    Filter retainer (2) Take out the filter and wash it in tap water. Then, dry the air filter completely. When the air filter is very dirty, use a neutral cleaner. (3) Install the air filter by using the filter retainer. ML-2550A/2551A...

  • Page 197: Chapter 2 Inspection And Measure To Be Taken At Occurrence Of An Error

    The communication line between the laser power supply and the laser controller is abnormal. If there is any noise generation COMMUNICATION LINE ERROR source nearby, separate it as far as possible or take a preventive measure for occurrence of noise. ML-2550A/2551A...
  • Page 198 Dust off the wire net or the water filter, or replace the water filter. Purity of the secondary cooling water is DEIONIZE TROUBLE low. Allow the cooler to operate for 50–60 (****MΩ•cm) minutes. If this trouble still occurs, replace the ionexchange resin. ML-2550A/2551A...
  • Page 199 If the trouble will continue even after lamp has been replaced, consult us. The branch unit cover plate is removed, or BRANCH UNIT COVER OPENED its mounting screws are loosened. Secure the cover plate with the screws. ML-2550A/2551A...
  • Page 200 T h e e r r o r m e s s a g e i s (OVERLIMIT OF MAX PWR) displayed when inputting the set value. The set value is reset to the value before the change. ML-2550A/2551A...
  • Page 201 BRANCH MIRROR 1 TROUBLE Extend the time from input of beam select BRANCH MIRROR 2 TROUBLE signal to input of laser start signal. If the BRANCH MIRROR 3 TROUBLE trouble will continue even after the above measures, consult us. ML-2550A/2551A...

  • Page 202: Operation For Closing Interlock

    Laser output decreases though monitor displays normal have been dislocated. For adjusting the axis, value. (When welding is not performed or weld strength is not consult us. enough.) ML-2550A/2551A...

  • Page 205: Specifications

    Specifications Specifications ML-2550A ML-2551A 400 W 300 W Maximum rated output 80 J/P (Pulse width 10 ms) 50 J/P (Pulse width 10 ms) Max. output energy 8 kW 5 kW Max. peak power Standard: 0.3 to 100.0 ms (0.1 ms steps) Pulse width Fine setting: 0.25 to 5.00 ms (0.05 ms steps)
  • Page 206 Take care not to exceed these values when using the optical fiber. For single-delivery or timesharing The value becomes 1/2 at 2-powersharing, 1/3 at 3-powersharing, and 1/4 at 4-powersharing. Model ML-2550A ML-2551A Core dia. SI φ 0.3mm 50J, 200W SI φ...

  • Page 207: Dimensional Outline Drawings

    Dimensional Outline Drawings Dimensional Outline Drawings Top view Unit: mm Right side view Front view (70) 1347 Rear side view OUTLET INLET ML-2550A/2551A...

  • Page 208: Available Output

    To obtain the maximum rated output with a short pulse width setting, it is necessary to increase the peak power or repetition. Set conditions such as the pulse width and repetition not to exceed the upper-limit output. The specification for each model is as follows. ML-2550A ML-2551A Model Maximum rated output...
  • Page 209 Available Output ML-2551A Upper-limit output (W) Peak power (kW) ML-2550A/2551A...

  • Page 210: Timing Chart

    For external input/output signals, laser light is output by putting pin No.21 of the EXT.I/O (1) connector in a closed circuit and stopped by putting this pin in an open circuit. ML-2550A/2551A...
  • Page 211 Time required for the end signal to be output after a laser output. Time required for outputting a signal to indicate whether the laser 40ms energy is within the set upper limit value (HIGH) and lower limit value (LOW) of monitor output. ML-2550A/2551A...
  • Page 212 Time required for outputting a signal to indicate whether the laser energy is within the set 40ms upper limit value (HIGH) and lower limit value (LOW) of monitor output. In *2 and *4, the acceptance time is 16 ms but can be changed to 0.1, 4.0 or 8.0 ms on the MEMORY SWITCH screen. ML-2550A/2551A...
  • Page 213 (HIGH) and lower limit value (LOW) of monitor output. In *2 and *4, the acceptance time is 16 ms but can be changed to 0.1, 4.0 or 8.0 ms on the MEMORY SWITCH screen. ML-2550A/2551A...
  • Page 214 Time required for the end signal to be output after a laser output. Time required for outputting a signal to indicate whether the laser 40ms energy is within the set upper limit value (HIGH) and lower limit value (LOW) of monitor output. ML-2550A/2551A...
  • Page 215 Charging time. When a high voltage is turned ON and charging is 31s max. completed, the READY status is provided. 150ms or more Shutter operation time 2ms min. Monitor error output time. Minimum error output time for 500 pps. ML-2550A/2551A...

  • Page 216: Explanation Of Terminology

    ON or OFF. In this laser, DIP switches are mounted DIP switch on the CPU board and the fiber breaking sensor board. DIP switch is an abbreviation of Dual In- line Package switch. → P.108 Control code that is used for communication between computers. → P.151 ML-2550A/2551A...
  • Page 217 Unit to transmit laser light to the optical fiber. → P.22 and P.51 Synthetic resin to exchange ions in media (mainly water) in contact. In this laser, this resin Ion-exchange resin removes the ions that are generated as cooling water is deteriorated, in order to keep the cleanliness. → P.183 ML-2550A/2551A...
  • Page 218 When an error is found, data is retransmitted or processing is interrupted. → P.147 Protective earthing terminal. This is a terminal that is provided to ground a device. Abbreviation of Protective Earth. → P.47 ML-2550A/2551A...
  • Page 219 SCHEDULE number. → P.78 A type of PLC (Programmable Logic Controller) that exerts sequence control by executing the Sequencer programmed contents of control, being a product name of Mitsubishi Electric Corporation. ML-2550A/2551A...
  • Page 220 Neodymium (Nd3+) to Yttrium-Aluminum-Garnet. This rod is inserted in the laser chamber in this laser. → P.22 and P.35 Work distance Distance from the laser light output position to the target workpiece for laser welding. ML-2550A/2551A...

  • Page 221: Output Schedule Data Entry Table

    Output Schedule Data Entry Table Output Schedule Data Entry Table ML-2550A/2551A...
  • Page 222 Output Schedule Data Entry Table ML-2550A/2551A...
  • Page 223 Output Schedule Data Entry Table ML-2550A/2551A...
  • Page 224 Output Schedule Data Entry Table ML-2550A/2551A...
  • Page 225 Output Schedule Data Entry Table ML-2550A/2551A...
  • Page 226 Output Schedule Data Entry Table ML-2550A/2551A...

  • Page 227: Index

    Output Pins of EXT.I/O (1) Connector 132 graph display 80 Output Pins of EXT.I/O (2) Connector 134 graphically displayed 80, 82 PLC 127 graphic display 82 REMOTE INTERLOCK Connector 31, 136 laser output energy 66 number of laser light outputs per second 67, ML-2550A/2551A...
  • Page 228 Controlling Branch Shutters Independently Package for accessories 24 DIP switch 107 PANEL CONTROL 59, 86 sharing specification 104, 107 password 94 SHOT 67, 70 PASSWORD Screen 71, 94 SHOT COUNT 69 PEAK POWER 65, 121 SI 68 PLC 127 ML-2550A/2551A...
  • Page 229 SWITCH 6 77 timesharing 22, 104 Timesharing unit 35, 104, 106 Touch Panel 62 TROUBLE RESET 64 VALUE CHANGE 95 Warning/Danger Labels 16 Water Filter 185 Water Level Label 31 WATER TEMP 63 WATER TEMPERATURE 120 YAG rod 22 ML-2550A/2551A...

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Ml-2551a

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