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Universal Laser Systems ULS 1720C Operation And Maintenance Manual

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OPERATIO A D MAI TE A CE MA UAL
Model ULS 1720C
Universal Laser Systems, Inc.
7707 East Acoma Drive
Scottsdale, AZ 85260
602/483-1214
Volume I, Rev. 5
April, 1992

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Summary of Contents for Universal Laser Systems ULS 1720C

  • Page 1 OPERATIO A D MAI TE A CE MA UAL Model ULS 1720C Universal Laser Systems, Inc. 7707 East Acoma Drive Scottsdale, AZ 85260 602/483-1214 Volume I, Rev. 5 April, 1992...

  • Page 2: Table Of Contents

    TABLE OF CO TE TS NOTICE ...........................1 INTRODUCTION......................2 SECTION 1 - SAFETY ....................3 1.1 SAFETY SUMMARY................3 1.2 SAFETY LABELS..................4 1.2.1 EXAMPLES OF SAFETY LABELS ..........4 1.3 SAFETY INTERLOCK ................5 1.4 ELECTRICAL SAFETY ................5 SECTION 2 - INSTALLATION..................7 2.1 CAUTIONS ....................7 2.2 SET UP PROCEDURE ................7 2.2.1 VENTILATION PROCEDURES ..........8 2.2.2 CONNECTION WITH COMPUTERS ........9...
  • Page 3 4.3.1 FINAL FOCUS LENS ..............27 4.3.2 FOURTH MIRROR CLEANING..........28 4.3.3 THIRD MIRROR CLEANING ...........28 4.3.4 SECOND MIRROR CLEANING..........29 4.3.5 BEAM WINDOW CLEANING ..........30 4.4 TOP DOOR ADJUSTMENT ..............30 4.5 SET SCREW REPLACEMENT..............31 4.6 FIRST MIRROR CLEANING AND BEAM ALIGNMENT .....32 4.7 LASER REPLACEMENT................37 4.8 FIGURES FOR MAINTENANCE SECTION ...........39 SECTION 5 - WARRANTY ...................43...

  • Page 4: Notice

    Universal Laser Systems, Inc. OTICE Universal Laser Systems, Inc. does not assume any liability arising out of the application or use of any products, circuits or software described herein. Neither does it convey a license under its patent rights nor the patent rights of others.
  • Page 5 The ULS series of Laser Processing Systems are designed to provide the user with the flexibility of computer control combined with a wide variety of functions. The main features of the ULS 1720C system are: • Air cooled, RF driven 20 watt C0 2 laser based on the latest technology in sealed carbon dioxide devices.

  • Page 6: Section 1 - Safety

    Class I rating and result in hazardous laser radiation exposure. ULS systems are specifically designed to comply with CDRH performance requirements under 21CFR 1040.10 and 1040.11. No guarantees of suitability or safety are provided for any use other than those specified by Universal Laser Systems, Inc.

  • Page 7: Safety Labels

    SAFETY LABELS According to CDRH standards, all interlocked and non-interlocked covers that allow access to a Class IV laser beam must have appropriate laser safety labels attached to them. These labels must be visible to personnel prior to the removal of the covers. Additional labels must be installed inside the machine and be visible if the covers are removed from the machine.

  • Page 8: Safety Interlock

    Label Positions Inside front door (visible when door is open). DANGER INVISIBLE LASER RADIATION WHEN OPEN Bottom panel (visible when door is open) AND INTERLOCK FAILED OR DEFEATED. AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION. Inside top door (visible when door is open). Interlocked Panels Rear panel of top compartment (visible when top cover is removed).
  • Page 9 and only for the purpose of servicing the equipment contained within. The service box should remain closed at all other times. TOP ENCLOSURE Top Door Top Door Interlock Left Interlock Right Interlock Defeat Tool Front Door Front Door Interlock Left Interlock Right Sutter Open...

  • Page 10: Cautions

    • SET UP PROCEDURE The following is a description of the basic procedure for connecting the ULS 1720C laser system to a computer for the first time: Install the system on a flat, stable stand. A stand from 18 to 24 inches in height will provide the most comfortable working height.
  • Page 11 Connect the fume exhaust tube on the machine to an external exhaust unit (see the exhaust system section below for details). (For the optional ULS closed loop exhaust, connect the two hoses between the laser system and the filtration unit and plug the filtration unit into an AC power source.) Connect the laser system to the computer.

  • Page 12: Dip Switch Location

    Locate laser system where a straight connection to the duct work can be achieved. A short piece of flexible hose should be used to connect the laser system to the rigid duct work. The exhaust system should be equipped with an on/off switch and wired in accordance with local electrical codes.
  • Page 13 This switch is used to set the data format and baud rate when the serial interface is used. For details refer to the "DIP Switch Setting Table" in Appendix A. 2.2.4 RS-232 SERIAL CABLE CO FIGURATIO To use the serial connection on the laser system, the proper serial cable must be used. The diagram below describes the serial cable configuration required.

  • Page 14: Section 3 - Operation

    SECTIO 3 - OPERATIO BASIC OPERATI G PROCEDURE Turn power to the system ON. Insert the material to be processed. Adjust the focus (reference Section 3.8). Close all access doors. Choose a laser power setting (reference Section 3.6). Set the processing speed (reference Section 3.5) (can also be set from software). Be sure the shutter switch is in the open position.

  • Page 15: Operation Controls

    CO TROL PA EL LAYOUT Operation Controls Laser Control Display X POSITION Y POSITION REPEAT REPEAT MODE TEST VIEW ENTER PAUSE POWER PULSE FAST WIDTH PULSE RATE STORE SHUTTER PROGRAM DELETE MODE SELECT OPEN P SPEED CLOSED Laser Control Shutter Controls Keypad Processing Speed Controls...
  • Page 16 OPERATIO CO TROLS POSITIONING KEYS These keys are used to move the focusing optics manually in any of the arrow directions (four directions) indicated on the keys. Pressing two adjacent keys together moves the optics carriage in a diagonal direction. FAST FAST KEY Pressing this key together with an arrow POSITIONING key increases the positioning speed at...
  • Page 17 REPEAT MODE REPEAT MODE KEY AND LED Used to temporarily store drawings that are being sent by the computer. This function allows the user to repeat the processing of a drawing while freeing up the computer for other tasks. To use, press the Repeat Mode key and note that the Repeat Mode LED should illuminate (indicating that all incoming drawings will be stored).
  • Page 18 Normally this indicator is illuminated and not flashing when power to the laser system is on. If a communication error occurs, the indicator will begin flashing. A communication error is caused by either an improper connection to the computer or the transfer of an unknown command from the computer.
  • Page 19 on the material being used, the type of engraving or cutting being performed, and the depth of material removal required. There are two methods for adjusting the processing speed: Control Panel Processing Speed Adjustment: P-SPEED THROUGH SPEED SELECT KEYS Press and hold the P-speed key on the control panel then press one of the processing Speed keys (1 to 8) to change the processing speed.
  • Page 20 If software resident in Windows is being used, the processing speed can be set through the ULS Windows printer driver. The procedure for setting speed is explained in the documentation included with the driver. (This driver is required if Windows is being used and can be purchased from ULS.) OTE: If software is being used to control speed then the speed at the control panel should be...
  • Page 21 Proportional pulse mode will be used for most cutting and engraving operations. PPM will provide an even exposure of laser radiation to the material and eliminate variations in depth and line thickness due to acceleration and deceleration of the optical arm. This even exposure is obtained by linking the laser control pulses with the movement of the motion system.
  • Page 22 be edited. The power setting number selected should appear blinking in the upper left corner of the display panel along with the previously stored laser control parameters. Editing is then performed as follows: To change Mode: Press Mode key to select the desired mode (P = PPM; C = CPM, = =OFF) To set Pulse Width (0 - 1400): Press PULSE WIDTH key and the pulse width data in upper right corner of the display will start blinking.

  • Page 23: Focusing Procedure

    During normal operation the laser system will use the power setting which is currently displayed on the control panel. To recall a different stored power setting for use, press in sequence the program select key, the power setting number which contains the desired power setting, and the store key.
  • Page 24 with high resolution optics) thick provided the material fits within the engraving area. A convenient focusing tool with the proper length for the standard optics is provided with the system. To use this tool follow the instructions below. To use the focusing tool with the system: Set the focus tool base on the top surface of the material to be processed.

  • Page 25: Command System

    Diagram of Focus Tool Use 3.10 COMMA D SYSTEM The ULS laser systems emulate an HP-GL plotting device and therefore are controlled by a built in library of HP-GL Commands. The HP-GL command set used is actually RD-GL-I which is a superset of HP-GL commands written by Roland Digital Corporation.
  • Page 26 OTE: Setting the field size for the Laser System will not guarantee access to the entire field unless the software being used is configured with the same page size dimensions. For the procedure required to configuring software page size please consult the software manuals for the program being used.

  • Page 27: Safety Summary

    Class I rating and result in hazardous laser radiation exposure. ULS systems are specifically designed to comply with CDRH performance requirements under 21CFR 1040.10 and 1040.11. No guarantees of suitability or safety are provided for any use other than those specified by Universal Laser Systems, Inc.

  • Page 28: General Cleaning

    GE ERAL CLEA I G Perform a visual inspection of the machine at least once a day. If dirt or debris is present a general cleaning should be performed. The frequency of cleaning will depend entirely on the type of material being cut or engraved. Dirt aloud to build up in any parts of motion system will cause uneven engraving or loss of position as well as damage to optics and premature failure of the motion system components.

  • Page 29: Optics Cleaning

    Clean front X rail and groove on both sides using a cotton swab and alcohol. Clean white bearings using a swab and alcohol by holding swab against bearing and moving Y rail assembly left and right several times. Repeat for each bearing. Clean rear X rail top and bottom with a tissue and alcohol.
  • Page 30 once a day. If haze or debris is present on the optical surfaces an optics cleaning should be performed. As a general rule, if the machine itself is dirty the optics are probably dirty as well. Follow these instructions to clean the optics: 4.3.1 FI AL FOCUS LE S Remove the 4-40 thumb screw from the side of the lens holder located on movable optics carriage.
  • Page 31 Replace spacer in lens housing and gently insert lens into lens holder ensuring convex side of lens is up away from spacer. Place remaining spacer on top of lens and screw threaded insert snugly into place. CAUTIO : Over-tightening the threaded insert can cause the optical element to break. Carefully slide the lens holder assembly back onto the optics carriage on the rail.
  • Page 32 i. The cover is removed by loosening two screws that go up through the frame just inside the front door at the left and right sides of the frame (reference Figure 1) Also, remove knob for Z stage (table height adjustment) ii.
  • Page 33 Finally, drag the lens tissue across the mirror surface cleaning and drying the lens with the dry portion of the lens tissue in one movement. Inspect mirror and repeat procedure if necessary until mirror is clean. OTE: Never use the same tissue twice as dust build-up on the tissue may scratch the surface of the mirror.
  • Page 34 • wiggly lines occur in either X, Y or diagonal movement. • To replace set screws (new set screws can be ordered from Universal Laser Systems): Y Axis Turn off system power. Remove the top cover as follows: i.
  • Page 35 Using a small jeweler's screwdriver remove the four nylon ball tipped setscrews from the bottom of the optics carriage (see Figure 6). While periodically looking from the front of the machine, carefully insert new nylon ball tipped set screws into the optics carriage just far enough to start the threads but not far enough to bring the ball tips in contact with the rail.
  • Page 36 4.6 FIRST MIRROR CLEA I G A D BEAM ALIG ME T First mirror cleaning and beam alignment must be performed together. This is not a regular maintenance procedure and should only be performed after consulting with a Universal Laser Systems Technician.
  • Page 37 10. Thoroughly dust off the mirror using an oil free compressed air source or the Freon duster described earlier. If mirror is extremely dirty use a stream of lens cleaning solution #1 from the small plastic wash bottle to flush the surface instead. 11.
  • Page 38 #1 mirror. If a beam still does not appear, contact a Universal Laser Systems Technician. 21. Place a piece of thermal paper in front of mirror #2 (reference Figure 3) and center the beam on mirror #2 by adjusting mirror #1.
  • Page 39 25. Move the motion system to the P position by pressing the P key and turn the laser on and off with the test key, leaving it on long enough to mark the brown tape. If no mark is produced find the beam with a piece of thermal paper and center it on the tape with the knobs on the back of mirror #2.
  • Page 40 This is a normal occurrence with sealed CO 2 lasers and ULS laser systems have been designed with a field replaceable laser. This is not a routine maintenance procedure and you should consult with a Universal Laser Systems technician as arrangements for a replacement laser will have to be made.
  • Page 41 A first mirror cleaning and beam alignment will be necessary as part of replacing the laser. Begin with the procedure for first mirror cleaning and replace the laser by following the steps below before proceeding with beam alignment. Laser Removal Unplug the small mini-jack connector at the end of the laser opposite the shutter support block.
  • Page 42 Install the three retainer bars on rear of laser supports using six 10-32 socket head cap screws. Plug mini jack into end of laser. Carefully push green, white and black wires of the power cable through grommet in vertical plate. Push the wires through one at a time. Attach green, white and black wires to the terminal block in their proper positions.
  • Page 43 FIGURES FOR MAI TE A CE SECTIO Enclosure Hold Down Screws Z-Stage Knob UNIVERSAL LASER SYSTEMS FIGURE 1 - ENCLOSURE HOLD DOWN LOCATIONS Laser retaining bar (One of three to be removed) One of four screws to be removed FIGURE 2 - LASER REMOVAL AND INSTALLATION Note: Large arrows show correct path for...
  • Page 44 Shutter Support Block (twist block as shown by arrows when aligning beam) 1st Mirror (twist mirror as shown by arrows when aligning beam) Thermal Paper First Position Window 4th Mirror Window Holder Left Motion System Rail Thermal Paper 2nd Position Focus Lens Holder (see figure 1) Masking Tape...
  • Page 45 Threaded insert (unscrew to remove) convex surface Lens spacer facing upward Final focus lens lens spacer lens holder Thumb screw FIGURE 4 - FOCUS LENS ASSEMBLY DETAIL Nylon Tipped Ball Plunger Set Screws Nylon Tipped Ball Plunger Set Screws FIGURE 5 - Y-ARM SET SCREW DETAIL...
  • Page 46 Y-Bearing Y-Rail Y-Bearing Nylon Tipped Ball Plunger Set Screws Y-Bearing Focus Lens Focus Lens Carriage Base Nylon Tipped Ball Plunger Set Screws Y-Bearing Y-Rail FIGURE 6 - FOCUS LENS CARRIAGE SET SCREW DETAIL...
  • Page 47 All warranty work must be performed by ULS. Universal Laser Systems reserves the right to request that the system be returned to the factory for repair, or to provide on-site repair. During the warranty period, shipping charges will be paid by ULS.
  • Page 48 I -WARRA TY SERVICE A defective laser system may be shipped to Universal Laser Systems, Inc. F.O.B. Scottsdale, Arizona after an R.M.A. number has been issued. Please call for an R.M.A. number. Systems will not be accepted without an R.M.A. number. Defective units will be repaired or replaced at manufacturer's option depending upon the severity of the defect.
  • Page 49 For current information regarding field service call Universal Laser Systems, Inc., Scottsdale, Arizona, (602)483-1214.
  • Page 50 APPE DIX A - DIP SWITCH SETTI GS TABLE Dip Switch 1 (DSW1) Dip Switch 2 (DSW2) CHARACTER FONT INTERFACE EXPAND FIELD KANJI BAUD RATE DATA PARITY DATA STOP COMMAND UNUSED SELECT MODE SIZE MODE FLOW MODE RD-GL-I SERIAL Y-DROP 7 BIT 2 BIT ANSI A...
  • Page 51 DSW2 1-8: Used to setup the serial interface communication parameters. DSW2 9: OFF sets the command mode to RD-GL I. This switch should always be in the OFF position. The default switch positions set at the factory are as shown in the diagram below: Dip Switch 1 (DSW1) Dip Switch 2 (DSW2)
  • Page 52 APPE DIX B - LASER SYSTEM SPECIFICATIO S Model Number ULS 1720C Maximum Engraving Area 17" x 11.5" Maximum Engraving Speed 16.5"/second Laser Source 20 Watt C0 2 Laser Beam Diameter - Standard Optics 0.007" - High Resolution Optics (Optional) 0.003"...
  • Page 53 APPE DIX C - LASER OPERATI G PARAMETERS This appendix is divided into two sections. One contains graphs for maximum usable pulse width at varying speeds and pulse rates. The other section contains useful power settings for various materials. Instructions for the use of the graphs follows. When operating in proportional pulse mode the electronics track the movement of the motion system and pulse the laser in a manner such that a constant number of pulses per unit of measure is applied to the material.
  • Page 54 b. If the resolution of the image is inadequate (for example an image is to coarse or a cut edge is not sharp enough) then the pulse rate can be increased. Choose a higher pulse rate and repeat steps 3-4. 5.
  • Page 55 Laser Settings for Common Materials The following is a list of laser power settings for various materials. This list is meant to be a starting point only and power settings will have to be fine tuned for best results. LEGE D: Pulse Width Pulse Rate Mode=...
  • Page 56 MODE SPEED Acrylic [Plexiglass] (See Applications otes 5 and 9): Engrave 39999 1-10 Cut (1/16") One Pass: 39999 Cut (1/8") 2-3 Passes: 1200-1400 39999 Clear Polyester [Mylar]: Engrave 20-80 39999 Cut (See Applications ote 7) 39999 1-20 Cut (See Applications ote 14) 39999 DAP: Mark...
  • Page 57 MODE SPEED Oak (See Applications otes 5, 9, and 10): Mark 100-150 39999 Cut (Less than 1/16" per pass) 00-1000 39999 Remove Fill 12000 Walnut (See Applications otes 9 and 10): Mark 100-150 39999 Cut (Approximately 1/8" per pass) 800-1000 39999 Remove Fill 7000...
  • Page 58 APPLICATIO OTES: Clean with alcohol after final pass. Clean with acetone after final pass. Clean with alcohol between passes. Clean with acetone after final pass. Use masking paper to prevent smoke damage. Use wet masking paper or liquid soap to prevent flame damage/edge defects. Use wet paper towel to prevent edge effect.

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