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Centron Technologies MS930A Service Manual

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SERVICE MANUAL
SEGMENTATION SYSTEM
Model
MS930A, MS930E
MS940A, MS940E
MS950A, MS950E
MS960A, MS960E
MS970A, MS970E
Centron Technologies Corporation

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Summary of Contents for Centron Technologies MS930A

  • Page 1 SERVICE MANUAL SEGMENTATION SYSTEM Model MS930A, MS930E MS940A, MS940E MS950A, MS950E MS960A, MS960E MS970A, MS970E Centron Technologies Corporation...
  • Page 2 SERVICE MANUAL SEGMENTATION SYSTEM Model MS930A, MS930E MS940A, MS940E MS950A, MS950E MS960A, MS960E MS970A, MS970E No. CAT.MS950SM1.1Ee ISSUE 2 DEC. 2005 Centron Technologies Corporation 319-25 Sadang-4-dong, Dongjak-ku Seoul 156-823 KOREA Tel. +82-2-522-7807 Fax. +82-2-522-7806 Website: www.centrons.com...
  • Page 3 • Only authorized and trained personnel should remove covers. 2. Installation: Nominal AC mains voltage of the models MS930A-970A is 100-120 volts 50/60Hz, and operational voltage range is 90-132 volts. Nominal AC mains voltage of the models MS930E-970E is 200-240 volts 50/60Hz, and operational voltage range is 180-264 volts.

  • Page 4: Table Of Contents

    Contents page Important Note Contents List of Figures 1. Introduction 1-1. General 1-2. Feature 1-3. Specification 2. Appearance and Function 2-1. Control Unit 2-2. Segmentation Unit 3. System Description 3-1. General 3-2. Control Board 3-3. I/O Board 3-4. Power Distribution Board 3-5.
  • Page 5 page 6. Schematic Diagram 7. Technical Illustration 8. Parts List List of Figures [Figure 1-1] Segmentation system MS950 [Figure 2-1] Control unit [Figure 2-2] Segmentation unit [Figure 3-1] Overall system block diagram [Figure 3-2] RF board functional block diagram [Figure 3-3] Sealing head unit functional block diagram [Figure 5-1] Troubleshooting flow chart...

  • Page 6: Introduction

    1-1. General This Service Manual covers all technical information of Segmentation Systems MS930A/E - MS970A/E for servicing and maintenance of the machines. The model numbers of Segmentation System denote the number of sealing head, and the voltage range of AC main.
  • Page 7 1 - 2...

  • Page 8: Feature

    1-2. Feature The Segmentation System is a device to make multiple number of seals or segments of thermoplastic tubing in a few seconds. The machine generates high-level power of 40.68 MHz radio-frequency signal for a melting process called 'dielectric heating'. Tubing in the sealing heads melts quickly in about two to three seconds, and then cools to form seals.

  • Page 9: Specification

    - Segmentation unit : (green), (red) READY SEALING (9) Alarms : audible indication by buzzer, visual indication by lamps (10) Dimension and weight Model MS930A/E MS940A/E MS950A/E MS960A/E MS970A/E Control unit 406-200-310 518-200-310 630-200-310 742-200-310 854-200-310 - Size, W-H-D [mm] 10.5...

  • Page 10: Appearance And Function

    2. Appearance and Function 2-1. Control Unit (MS950A/E shown) 2 - 1...
  • Page 11 The control unit contains power supplies, RF generator boards and control circuit board. Each power supply unit supplies 12 volts DC current to each RF generator board that generates 40.68 MHz RF power. RF powers go to the segmentation unit through coaxial cables in the inter-unit cable assembly.
  • Page 12 In alarm condition, the followings take place: (1) The green POWER ON lamp on the front panel of control unit flashes. (2) Beeps sound. (3) Only in remote command mode operation, a status code among $A,2 - $E,2 displayed. For example, when # 3 head does not work, $C,2 will be given.

  • Page 13: Segmentation Unit

    2-2. Segmentation Unit (MS950A/E shown) 2 - 4...
  • Page 14 The segmentation unit has all sealing head units and a signal distribution board in the base plate . All sealing head units are identical in configuration, but only the trigger lever in the sealing head unit mounted at #1 position is active and another trigger levers are in inactive state.

  • Page 15: System Description

    3. System Description 3-1. General The Segmentation System consists of the control unit, the segmentation unit and an inter-unit cable assembly. The control unit contains one control circuit board and 3 - 7 pieces of power supply and RF board, depending on the model. E.g., MS950A/E has 5 power supplies and RF boards.

  • Page 16: [Figure 3-1] Overall System Block Diagram

    [Figure 3-1] Overall System Block Diagram 3 - 2...

  • Page 17: Control Board

    3-2. Control Board Control board is a microprocessor-based circuit and has eight identical channels of control circuitry. The board is powered by #1 power supply unit. Sealing operation starts by a trigger signal, either come from the trigger switch in #1 sealing head unit or given by command at a remote control mode.

  • Page 18: Rf Board

    3-7. RF Board RF board comprises an oscillator, drive amplifier stages and power amplifier, and filter networks. [Figure 3-2] represents the functional block diagram of RF board. A crystal oscillator generates stable RF signal when control command is applied. The signal is amplified at drive amplifiers, then fed to power amplifier stage.

  • Page 19: Distribution Board

    3-8. Distribution Board Command data and solenoid powers are distributed to eight identical channels. #1 channel only has the trigger command line. 3-9. Sealing Head Unit Sealing head unit comprises sealing electrode, solenoid, trigger board assembly, trigger micro-switch, limit micro-switch, matching board and switch board. [Figure 3-3] represents the functional block diagram of sealing head unit.

  • Page 20: Switch Board

    An ENABLE/DISABLE selector switch is prepared on the rear panel of each sealing head unit. If the selector switch is selected at DISABLE, the sealing head unit does not work even if an ENABLE command is given in remote command mode. On each sealing head units are two LED indication lamps.

  • Page 21: Standard Operating Procedure

    4. Standard Operating Procedure 4-1. Operation Mode Four operation modes are available with this Segmentation System: - Local mode - Remote modes; (1) Remote switch mode (2) Remote circuit mode (3) Remote command mode (a) Local Mode Local mode is a mode that the machine operates by itself without any external device. Default mode is the local mode.
  • Page 22 - It is turned on when a sealing cycle ends, that means tubing can be taken out now. - It is turned off when tubing is loaded in #1, that means it's ready to start sealing. This mode is useful to use the machine in an automated production line. (d) Remote Command Mode Remote command mode is a mode that the machine is controlled by an external microprocessor circuit or a PC.
  • Page 23 switch is set at DISABLE position, the sealing head unit remains in disabled condition and will not be enabled even if an enable command is given. Note 3 - Another way to reset system mode to local is turning system power switch off and then on again, as power-on default mode is local mode.

  • Page 24: Operation In Local Mode

    4-2. Operation in Local Mode (1) Install the machine. (2) If a connector or a cable is connected to the remote control connector on the rear panel of control unit, remove it. (3) Turn on the power switch. (4) Place tubing in sealing heads from the left to the right, and press the trigger lever in #1 sealing head.
  • Page 25 (1) Install the machine. (2) Connect a standard serial communication cable to the remote control connector and to the PC. (3) Turn on the computer, and run the file terminal.exe. (4) On menu bar, click Settings - Communications... In Communications dialog box, check communication parameters as; Baud rate : 19200 Data bits...
  • Page 26 Note 2 : The command $M,0 changes system mode from remote command mode to local mode. Another way to change system mode to local is turning system power switch off and then on again, as power-on default mode is local mode. Note 3 : To enter the command $S,1 to start sealing, you should hit 5 keys every time.

  • Page 27: Maintenance And Troubleshooting

    5. Maintenance and Troubleshooting This Chapter describes how to check, adjust and troubleshoot the machine with proper test equipment. Troubleshooting flow chart leads service personnel to a faulty assembly or to one or a few suspicious components. When a faulty assembly or component is isolated, it would be adjusted in accordance with the procedures in this chapter, or be replaced with a good one.

  • Page 28: Test Equipment

    5-2. Test Equipment Test equipment and tools listed below are necessary to do troubleshooting. (1) Minimum test equipment and tools for troubleshooting ; . Multimeter . Regulated DC power supply (12 volts/20 amperes) . Oscilloscope (10 MHz) . Frequency counter (100 MHz) .

  • Page 29: Troubleshooting Procedure

    5-3. Troubleshooting Procedure The troubleshooting flow charts in [Figure 5-1] will guide service personnel to a faulty assembly or components that should be replaced or corrected. When a faulty assembly is isolated, it will be adjusted to correct state, or be replaced with a new good assembly. In case that service people have good knowledge in electronics, proper test equipment and components, they can troubleshoot to a single faulty component.
  • Page 30 5 - 4...

  • Page 31: [Figure 5-1] Troubleshooting Flow Chart

    [Figure 5-1] Troubleshooting Flow Chart (Page 2/3) 5 - 5...
  • Page 32 [Figure 5-1] Troubleshooting Flow Chart (Page 3/3) 5 - 6...

  • Page 33: Adjustment Of Variables

    5-4. Adjustment of Variables On the control circuit board in the control unit are two 8-bit DIP-switch selectors, marked as SW1 and SW2. With these selectors, users can change working sealing head units, time interval of head starts, operation sequence of sealing heads, and timing of sealing head returns.
  • Page 34 (3) Selection of operation sequence of sealing heads Among 8-bits of SW1, the first high bit is used for selection of operation sequence of sealing heads. When the bit slide is set at left, sealing starts from #1 sealing head unit, then #2, then #3, ….

  • Page 35: Fixtures For Remote Mode Control

    5-5. Fixtures for Remote Mode Control To operate the machine in one of three remote modes, a fixture should be prepared by users. Refer to [Figure 5-2] below. The diagram is a conceptual drawing to give users technical understanding concerning interfaces between the machine and the fixture to be designed.
  • Page 36 a. Fixture for remote switch mode A fixture for remote switch mode is simple to make. It requires a single-pole/single- throw (SPST) switch (e.g. a foot switch) and a 9-pin D-Sub male connector. (1) Solder the switch at Pin 9 and Pin 5 of the 9-pin D-Sub connector. (2) Solder to make short between Pin 4 and Pin 5 of the 9-pin D-Sub connector.

  • Page 37: Adjustment Of Rf

    5-6. Adjustment of RF Following procedures describe standard check procedures for the RF circuitry. Refer to [Figure 5-3] below for test set-up, and schematic diagrams and board layout diagrams in Chapter 7. (1) Set up test equipment according to the [Figure 5-3]. (2) Set DC power supply at 12 volts.
  • Page 38 * CAUTION * Minimum heat dissipation gears to be prepared shall be 100 watts. Failure to prepare sufficient heatsink for RF board assembly may cause the RF transistors blown-up. (4) Set RF power meter, attenuator and spectrum analyzer at proper ranges to check 40.68 MHz power of 150 watts maximum.

  • Page 39: Cleaning Sealing Head

    5-7. Cleaning Sealing Head Sealing head area and the trigger lever can easily be stained by dust, spilled or leaked blood or blood components. Frequent cleaning will offer users the best long-term results. Never put sharp objects or metal objects on sealing head electrodes, as they can easily be marred.

  • Page 40: [Figure 6-1] System Wiring Diagram

    6. Schematic Diagram [Figure 6-1] System wiring diagram 6 - 1...
  • Page 41 6 - 2...
  • Page 42 6 - 3...

  • Page 43: [Figure 7-1] Exploded View Of Ms950 Control Unit

    7. Technical Illustration [Figure 7-1] Exploded view of MS950 . Control Unit (page 1/2) . Segmentation Unit (page 2/2) [Figure 7-2] Control board layout [Figure 7-3] I/O board layout [Figure 7-4] RF board layout [Figure 7-5] Power distribution board layout [Figure 7-6] Distribution board layout [Figure 7-7]...
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  • Page 52 8. Part List Each part is identified with manufacturer's part number in the Part List. Part location in unit is found by the find number in exploded views and circuit board layouts in Chapter 7. Prefix 'A' in find number denotes that it is not a single component but an assembly, so a lower-level part list of which is presented at another place.
  • Page 53 8 - 2...
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Ms930eMs940aMs940eMs950aMs950eMs960a ... Show all

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