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CHAPTER 6: OPERATING INSTRUCTIONS

LW250 PULSED Nd: YAG LASER

990-605 REV B: May, 1997

6-7

L25HSPD.WPG

Figure 6-5. Laser Output with

VOLT A Approximately Equal to VOLT B

High Speed Operation, FLASH1



FLASH2 (continued)

High Speed Operation, FLASH1



FLASH2.

In this case:

VOLT A > VOLT B or VOLT A < VOLT B

with no waveform control. Example settings are (refer to Figure 6-6):

Examples of Setting VOLT A



VOLT B

[

Schedule 1]

[Schedule 2]

-SCH.#01

TIME

VOLT

-SCH.#02

TIME

VOLT

FLASH1

08.0ms

FLASH1

10.0ms

COOL1

00.0ms

COOL1

00.0ms

FLASH2

00.0ms

A (or B)

FLASH2

00.0ms

A (or B)

COOL2

00.0ms

COOL2

00.0ms

FLASH3

00.0ms

A (or B)

FLASH3

00.0ms

A (or B)

A=400V*

B=300V*

A=400V*

B=300V*

*A and B set differently

Summary of Contents for LW250

Page 1: ...997 OPERATION MAINTENANCE AND SERVICE MANUAL FOR THE LW250 PULSED Nd YAG LASER Copyright 1997 Unitek Miyachi Corporation All Rights Reserved 1820 South Myrtle Avenue P O Box 5033 Monrovia CA 91017 713...

Page 2: ...f UNITEK MIYACHI CORPORATION and may not be reproduced copied exhibited or otherwise used without the written authorization of UNITEK MIYACHI CORPORATION Printed in the United States of America Revisi...

Page 3: ...r is certified to be fully compliant with all applicable standards and regulations as set forth by the United States of America s Health and Human Services HHS Food and Drug Administration FDA Center...

Page 4: ...iately contact the shipping company to file a claim and notify Unitek Miyachi Corporation at Unitek Miyachi Corporation 1820 South Myrtle Ave Monrovia CA 91017 7135 Phone 818 303 5676 FAX 818 358 8048...

Page 5: ...Y and to effectively take advantage of the full capabilities of the LW250 Laser please read this instruc tion manual and the Laser Safety Manual thoroughly before attempting to use the LW250 Laser Pro...

Page 6: ...1 3 Laser Operation Area 1 4 Operating the Laser 1 4 Laser Safety Officer 1 4 Cautions and Warning Indications 1 4 Cleanliness 1 4 Design Integrity 1 4 Maintenance 1 4 CHAPTER 2 System Description Sys...

Page 7: ...Signal Specifications EXT I O Connector 1 3 8 Output Signal Specifications EXT I O Connector 2 3 10 CHAPTER 4 SYSTEM TIMING Operation from the Control Pendant Simultaneous Splitting of the Laser Beam...

Page 8: ...orm Control 6 5 Laser Output 6 5 High Speed Operation FLASH1 FLASH2 6 6 High Speed Operation FLASH1 FLASH2 6 7 Applying Multiple Weld Schedules 6 8 Setting the Opening and Closing of Shutters 6 11 Sel...

Page 9: ...alcement 8 1 Alignment of the Ban Into the Fiber Optic Cable 8 4 Preparation 8 4 Z Axis Adjustment 8 5 X Y Axes Adjustment 8 7 Cleaning the Optics 8 9 Optical Component Cleaning Tools and Materials 8...

Page 10: ...Typical Monitor Screen 2 14 3 1 Input Contact Signals on Connector EXT I O 1 3 2 3 2 Input Contact Signals on Connector EXT I O 2 3 3 3 3 Input Transistor Signals on Connector EXT I O 1 3 4 3 4 Input...

Page 11: ...4 Laser Chamber Vacuum Release 7 5 7 5 Pump Hose Connections 7 6 7 6 Solenoid Valve Cleaning 7 7 7 7 Solenoid Valve operator 7 8 7 8 Flow Rate Controller Location 7 8 8 1 Setting the Maintenance Mode...

Page 12: ...le Title Page 1 1 Minimum Bend Radius for Specified Core Diameter 1 2 1 2 Maximum Allowable Input Energy Power Per Fiber 1 2 7 1 Water Draining Occasions 7 4 8 1 Minimum Bend Radius for Optical Fibers...

Page 13: ...stall the LW250 Laser securely on a firm level floor that is free from vibration Use 208VAC or 230VAC 50Hz 60Hz 3 phase power with a minimum of 1 5 kVA capacity Install good grounding CAUTION When pow...

Page 14: ...energy power values in excess of those listed in Table 1 2 may cause damage to the fibers Length specifications per fiber are 5 m 10 m or 15 m Table 1 2 Maximum Allowable Input Energy Power Per Fiber...

Page 15: ...ove 0 C If the temperature drops below 0 C perform the pro cedure detailed in Chapter 7 entitled Coolant Water Draining For Long Term Storage When Transporting the Laser or When The Temperature Drops...

Page 16: ...key switch to ensure that the laser is operated only by qualified and authorized personnel Caution and Warning Indications Make sure proper warning signs and warning lights are installed in and aroun...

Page 17: ...pply is required Electrical connection and cooling system servicing are accessed from the front maintenance door and side panels allowing the operator to easily perform tasks such as wiring and ion ex...

Page 18: ...OWER When the MAIN POWER switch is turned ON this indicator lights to signal the power ON condition HIGH VOLTAGE This lamp indicates that the high voltage is applied to the laser oscillator unit READY...

Page 19: ...and you press the handle the front door is locked Main Power Switch When you set this switch to the ON position laser power is turned on and the POWER indicator on the status panel lights Control Key...

Page 20: ...se these keys to move the display cursor up down right and left The item selected will be highlighted by the cursor ON OFF Key Use this key to raise or lower the value of a selected item or to change...

Page 21: ...LW250 PULSED Nd YAG LASER 990 605 REV B May 1997 2 5 LW25IPNL WPG Figure 2 3 Internal Controls Internal Controls and Indicators Figure 2 3 illustrates the controls inside the front door of the laser...

Page 22: ...ck Connector CAUTION Connect this connector in series with a room door or similar interlock to avoid accidental exposure to laser beam radiation Refer to Chapter 3 for connection details EXT I O 1 Con...

Page 23: ...er level gauge for deionized water tank Ion Exchange Resin Cartridge Enhances the purity of the deionized water Cooling Water Regulator Valve Adjust the flow rate of the cooling water Water Filter Rem...

Page 24: ...ply Covers When removed these covers allow you to access the power supply Laser Beam Input Unit Up to six ports for entry of optical fiber Optical Fiber Connector Cover When removed this cover accesse...

Page 25: ...ser beam into the attached fiber optic cable The laser beam input units are numbered from 1 to 6 from the front to the back of the laser Branch Shutter There are six branch shutters Each one is associ...

Page 26: ...o balance all laser outputs within a narrow range of power Branch Unit Cover Plate Refer to Figure 2 8 This panel on the side of the laser oscillator head blocks laser beams reflected from the optical...

Page 27: ...monitor maintenance monitor and status The status of the screens changes each time the MENU key is pressed As shown below Hatched characters 000 These characters are in data fields selected with the...

Page 28: ...nge is 0 to 200pps The shot field sets the total number of laser beam pulses to be emitted continuously in a sequence The setting range is 0 to 9999 pulses DMY is the abbreviation for dummy shots whic...

Page 29: ...LASER START STOP key on the control pendant All branch shutters are closed The power monitor is not operative and the upper and lower power limits are not detected The output for remote control is in...

Page 30: ...ITION BLINK ON to continuous light POSITION BLINK OFF Monitor Screen The data fields in the monitor screen Figure 2 12 are as follows SCHEDULE Allows you to select the schedule you wish to be monitore...

Page 31: ...Nd YAG LASER 990 605 REV B May 1997 2 15 Monitor Screen continued AVERAGE WIDE When this field displays AVERAGE ON the value of AVERAGE is indicated over the entire display screen With AVERAGE OFF di...

Page 32: ...on Open High voltage is turned off Laser start Closed Flash lamp flashes and laser beam is output Laser stop Open Laser beam is turned off Emergency stop Open Emergency stop is applied Beam Selection...

Page 33: ...ACE LW250 PULSED Nd YAG LASER 990 605 REV B May 1997 3 2 L25INSW1 WPG Figure 3 1 Input Contact Signals on Connector EXT I O 1 Input Signals continued Contact signals The contact signals are as illustr...

Page 34: ...ny pin other than Pin 16 Pin No 16 12V 30V input When inputting by contact signals short pin No 16 to pin No 15 If a transistor input is applied and power supply of 12V to 30V is available at the inpu...

Page 35: ...V B May 1997 3 4 L25INTR1 WPG Figure 3 3 Input Transistor Signals on Connector EXT I O 1 Input Signal Specifications continued Pin No 31 HV ON If the COM HV ON circuit is closed high voltage is applie...

Page 36: ...and stop with the software The software selection sets Pin 30 to ground External Start enabled The External I O Laser Start signal will then accept the Laser Start signal and start the welding cycle...

Page 37: ...ed Blank Input pin COM circuit open NOTES FOR START SIGNAL TABLE If any of the Schedule 1 2 3 and 4 signals are not input schedule 0 is set When using two or more schedules use from schedule 0 If BANK...

Page 38: ...utput from the laser input unit having the corresponding number 5 or 6 Pin 18 COM Used as the common line for the input signals and dc ground Remote Interlock Connector If this signal circuit is opene...

Page 39: ...in No 3 4 High voltage ON When high voltage is applied to the laser this circuit is closed to output the signal Pin No 5 6 Trouble When the laser malfunctions this circuit is kept closed to output the...

Page 40: ...CHAPTER 3 I O SIGNAL INTERFACE LW250 PULSED Nd YAG LASER 990 605 REV B May 1997 3 9 L25RLY WPG Figure 3 5 Output Signals on the EXT I O 1 Connector...

Page 41: ...O 2 Connector Output Signal Specifications EXT I O 2 Connector Refer to Figure 3 6 The output signal specifications are as follows Pin No 1 2 Resonator Shutter Open When the resonator shutter is open...

Page 42: ...LW250 PULSED N d YAG LASER 990 605 REV B May 1997 4 1 L25TMG1 WPG CHAPTER 4 SYSTEM TIMING Operation from the Control Pendant Simultaneous Splitting of the Laser Beam Into Two Branches...

Page 43: ...CHAPTER 4 SYSTEM TIMING LW250 PULSED N d YAG LASER 990 605 REV B May 1997 4 2 L25TMNG2 WPG Operation from External Signals Simultaneous Splitting of the Laser Beam Into Two Branches...

Page 44: ...R 4 SYSTEM TIMING LW250 PULSED N d YAG LASER 990 605 REV B May 1997 4 3 L25TMNG3 WPG Operation from External Signals Two Simultaneous Time Periods and Simultaneous Split of the Laser Beam into Two Bra...

Page 45: ...CHAPTER 4 SYSTEM TIMING LW250 PULSED N d YAG LASER 990 605 REV B May 1997 4 4 L25TMNG4 WPG Repeat Operation Simultaneous Split of the Laser Beam Into Two Branches...

Page 46: ...CHAPTER 4 SYSTEM TIMING LW250 PULSED N d YAG LASER 990 605 REV B May 1997 4 5 L25TMNG5 WPG Repeat Operation at High Speed 25 PPS Minimum...

Page 47: ...frame Store the fittings for future use when transporting the laser Power Cable Connections Refer to Figure 5 2 To connect the power cable to the power supply proceed as follows 1 Open the front main...

Page 48: ...er inlet and outlet fittings with the supplied bands Note Cooling water may be city water or industrial water with the following characteristics Temperature of 35 C 94 F maximum Pressure of 98 to 294...

Page 49: ...han deionized water or steam distilled water Using it with other liquids will contaminate it for future use Optical Fiber Connection Connection of the Interlock Signal Cable If an interlock signal cab...

Page 50: ...r to remove dust on the fiber end face 5 Match and insert the pointed end of the fiber connector into the receiving end of the input focusing unit 6 Refer to Figure 5 6 CAUTION Be sure that the connec...

Page 51: ...n the optical fiber s input end Refer to Chapter 8 in the section entitled X Y Axis Adjustment When the same optical fiber is removed and recon nected readjustment of the X Y axes is not required if t...

Page 52: ...continued Note When cleaning the fiber optic cables prior to insertion into the focusing heads always blow off the connectors on the focusing heads CAUTION Always use an air blower designed for use on...

Page 53: ...t ALL local state and federal safety standards Turning Power ON and OFF Turn the MAIN POWER switch located on the power panel on the front of the LW250 Laser to the ON position The POWER status indica...

Page 54: ...ill be displayed according to the resistance level as follows READY Below 3 00 milliohms per cm NOT READY Equal to or above 3 00 milliohms per cm WATER TEMPERATURE Indicates the temperature of the dei...

Page 55: ...indicated for WATER TEMPERATURE the high voltage is turned on to start charging the power supply When the charging is completed the word READY appears for half a second Then the screen changes to eith...

Page 56: ...CHAPTER 6 OPERATING INSTRUCTIONS LW250 PULSED Nd YAG LASER 990 605 REV B May 1997 6 4 Figure 6 1 Screen Selection Turning Power ON and OFF continued...

Page 57: ...n be set to either VOLT A or VOLT B You set the pulse duration of the flash lamp as follows 0 3 msec FLASH1 FLASH2 FLASH3 20 msec Laser Output Refer to Figure 6 3 If VOLT A and VOLT B are set to the s...

Page 58: ...r but the second FLASH2 shot cannot be emitted immediately after FLASH1 So you must set the schedule with VOLT A essentially equal to VOLT B as follows refer to Figure 6 5 Examples of Setting VOLT A V...

Page 59: ...In this case VOLT A VOLT B or VOLT A VOLT B with no waveform control Example settings are refer to Figure 6 6 Examples of Setting VOLT A VOLT B Schedule 1 Schedule 2 SCH 01 TIME VOLT SCH 02 TIME VOLT...

Page 60: ...the second laser pulse So the schedule can be changed relatively quickly Applying Multiple Weld Schedules When welding is performed repeatedly according to schedules where VOLT A or VOLT B is set to...

Page 61: ...Time Computation Applying Multiple Weld Schedules continued Examples of Single Shot Schedule 1 Schedule 2 SCH 01 TIME VOLT SCH 02 TIME VOLT FLASH1 08 0ms A FLASH1 10 0ms B COOL1 00 0ms COOL1 00 0ms FL...

Page 62: ...and VOLT B for Schedule 1 The graph in Figure 6 7 shows that the discharge cycle time is 5 5 seconds minimum In the case of waveform control as shown in Figure 6 9 the schedules are set up such that S...

Page 63: ...ning and Closing of Shutters CAUTION When blocking the laser beam with a branch shutter limit the laser beam power to 10 Joules once in 1 7 seconds and 6 watts Selection With the Control Pendant For t...

Page 64: ...with the lowest number For example if Branch Nos 1 3 and 4 are open the laser beam will be output first to Laser Beam Input Unit No 1 then to Laser Beam Input Unit No 3 then to Laser Beam Input Unit...

Page 65: ...When the optical fibers are removed from the fiber guides be sure to replace the opened fiber guides with unopened fiber guides in the fiber outlets of the laser Six fiber guides are supplied If the...

Page 66: ...power before starting work The Nd YAG laser becomes ready for oscillation if the high voltage is turned ON during maintenance work Use extreme caution while performing any work on the laser WARNING Ma...

Page 67: ...cement of ion exchange resin cartridge and water filter X Moving or transportation X Storage or long periods of non use X X When ambient temperature drops below 0 C 32 F X Replacing the Ion Exchange R...

Page 68: ...When replacing the water tank small water filter only and when only cleaning that filter Cleaning or Replacing the Small Water Filter To clean or replace the small water filter proceed as follows 1 Re...

Page 69: ...3 Using the special tool for the ion exchange resin cartridge turn the cartridge in the tank counter clockwise to remove the cartridge Discard the cartridge 3 Remove the small water filter located be...

Page 70: ...aser chamber and its hose to drain into the water tank 2 Refer to Figure 7 2 Remove the thumb screw on the drain pipe clamp Remove the drain pipe cap Rotate the flexible drain pipe tube until the outl...

Page 71: ...n the water into a shallow pan or floor drain system 3 Remove the two thumb screws on the water tank cover and remove the cover 4 Refer to Figure 7 3 Using the special tool for the ion exchange resin...

Page 72: ...eaning the Solenoid Valve Strainer The solenoid valve is located at the left of center under the front door see Figure 7 2 The tools required for cleaning the solenoid valve strainer are as follows Sm...

Page 73: ...low rate in the cooler depends on the frequency of the mains AC power which may be either 50 Hz or 60 Hz If the power frequency is changed you will need to replace the existing flow rate controller wh...

Page 74: ...he high voltage for maintenance work set the laser head cover interlock switch see Figure 8 1 to the Maintenance Mode The Nd YAG laser becom es ready for oscillation if the high voltage is turned ON d...

Page 75: ...the two M3 bolts at each end of the mirror cylinder and carefully remove the mirror cylinder from the laser chamber CAUTION Be careful not to scratch the inside surface of the laser chamber as you re...

Page 76: ...lamp and set the new flash lamp into the laser chamber Be sure that the flow tube is properly seated in its groove 12 Connect the flash lamp wires to the flash lamp holder and tighten the four M5 bol...

Page 77: ...illator head cover 18 Turn on the power to the YAG laser and set the flash lamp pulse width to 1 0 msec and the voltage to 400V 19 Pulse the flash lamp approximately 500 times with the resonator shutt...

Page 78: ...Figure 8 5 Remove the fiber scope holder from the storage position and mount it to the branch mirror position in the branch base Mount the fiberscope in the holder 4 Attach the fiber optic cable to th...

Page 79: ...is turned off before looking into the fiberscope Viewing the laser beam through the fiber scope should be comfortable to the eye During the axis adjustment procedure use a neutral density filter to re...

Page 80: ...crew Ring Turns Required for Defocus Fiber Diameter mm Adjustment Screw Ring Clockwise Turns 0 4 1 5 0 6 2 0 0 8 2 0 1 0 2 0 1 2 2 0 CAUTION If the branch mirror holder is moved readjust it so that th...

Page 81: ...ce of the optical fiber through the fiberscope adjust the X Y axes adjustment screw so that the guide beam comes to the center of the end surface The beam on the left is the rear reflection beam from...

Page 82: ...ory if you wish to do maintenance work on the optical components other than the input focusing unit and the optical fiber Optical Component Cleaning Tools and Materials The required optical component...

Page 83: ...ally 7 Remove the collar focusing lens and Teflon ring one by one from input focusing unit Hold the focusing lens by its edge Place the focusing lens on the lens paper Cleaning a Dusty Or Dry Dirt Coa...

Page 84: ...l the other end of the lens paper comes off the optic Any gap created between the lens paper and the optic during wiping as well as acetone remaining at the end of the lens paper without evaporating m...

Page 85: ...Verify that there is no dust or dirt on the end face of the fiber NOTE We recommend a fiber end face checker for viewing the end sur faces of the optical fibers for scratches dust or burns Power Suppl...

Page 86: ...ur malfunctions can be indicated simultaneously as follows TROUBLE E01 POWER SUPPLY COVER OPENED E02 HEAD COVER OPENED E03 HIGH TEMPERATURE OF COOLANT E04 LOW TEMPERATURE OF COOLANT HV OFF MAIN SHUTTE...

Page 87: ...The cover is removed or its mounting screws are loose Secure the cover with the screws 02 Head Cover Opened OFF ON The laser oscillator cover is removed Install it 03 High Temperature of Coolant OFF...

Page 88: ...d with the Deionize procedure 10 Emergency Stop OFF ON The emergency stop signal is entered Close the Emergency Stop input line in the EXT I O or the remote interlock input line Or release the Emergen...

Page 89: ...battery charge is low Replace the battery 25 Set Error Over Limit of Max Power ON The input power setting is beyond the maximum capacity voltage pulse width repetition rate The setting will be restore...

Page 90: ...the laser 36 Branch Unit Cover Opened OFF ON The branch unit cover is opened or its screws are loose Close the cover and tighten the screws 41 44 Trouble in Fiber Switch 1 through 4 OFF ON Either on...

Page 91: ...LW250 PULSED Nd YAG LASER 990 605 REV B May 1997 A 1 APPENDIX A TECHNICAL SPECIFICATIONS...

Page 92: ...wavelength 650 nm red Power Source Mains Power Voltage Settings 220 VAC 10 3 phase 50 60 Hz 60 amps or 220 VAC 10 1 phase 60 Hz by changing taps 200 to 500 VDC in 1 V steps Control Panel Schedule Set...

Page 93: ...ter Water D I Deionized Water or Steam Distilled Water 294 kPa 3 kgf cm2 maximum 98 294 kPa 1 3 kgf cm2 16 liters minute minimum 5 35 C 430 kcal h 1800KJ hr 15 mm Coolant Medium Deionized water or ste...

Page 94: ...LW250 PULSED Nd YAG LASER 990 605 REV B May 1997 B 1 APPENDIX B EXTERNAL COMMUNICATIONS INTERFACE SPECIFICATION...

Page 95: ...s of the Commands B 9 1 Data Setting B 9 2 Reading the Data B 10 3 Setting the Status control mode and schedule number B 11 4 Reading the Status B 12 5 Laser start command B 13 6 Laser stop command B...

Page 96: ...uter Serial Cable Connects between the host computer serial port and the RS 232 RS 485 converter Depending on the serial port to be used the cable may be terminated as either Standard female 9 pin to...

Page 97: ...ay 1997 B 4 fabricated by the user or supplied by Unitek Miyachi The cable schematic is shown below 3 Data Transfer 1 Type Conforms to RS 485 in an asynchronous full duplex party line 2 Baud Rate 9600...

Page 98: ...f Transmission ENQ 05H Enquiry ID ENQ 50H 30H 05H Identification Enquiry ACK 06H Acknowledge ID ACK 54H 31H 06H Identification Acknowledge NAK 15H Not Acknowledge 6 Text Format S T X Text Block E T X...

Page 99: ...calculate BCC and concatinate BCC to the end of the string NOTE printf statement is only to help debugging char calbcc bf char bf char bcc int n printf Command 02X bf 0 bcc 0 for n 1 n printf 02X bf...

Page 100: ...compose a command string to read the status of shutters sprintf command c 02d s c String Format STX Start of transmission code 0 Network Number 0 RS Code for reading status ETX End of transmission cod...

Page 101: ...lision will occur in the communi cation lines and the units will not operate properly To change the network number 1 Press the MENU key until the STATUS screen appears 2 Use the arrow keys to move to...

Page 102: ...0 are network numbers where CH1 number of tens and CH0 number of units 2 SH1 and SH0 are schedule numbers where SH1 number of tens and SH0 number of units 3 DT1 and DT0 are data numbers where DT1 numb...

Page 103: ...Side S T X C H 1 C H O R S H 1 S H O D T 1 D T O E T X B C C Laser Side S T X d a t a E T X B C C or C H 1 C H 0 N A K 1 CH1 and CH0 are network numbers where CH1 number of tens and CH0 number of unit...

Page 104: ...SH1 and SH0 are schedule numbers where SH1 number of tens and SHO number of units 3 cnt is the control mode Cannot set to the external control or maintenance mode Sustain 0 Panel Control 1 External Co...

Page 105: ...stain s5 Branch Shutter 2 0 OFF 1 ON Sustain s6 Branch Shutter 3 0 OFF 1 ON Sustain s7 Branch Shutter 4 0 OFF 1 ON Sustain s8 Branch Shutter 5 0 OFF 1 ON Sustain s9 Branch Shutter 6 0 OFF 1 ON Sustain...

Page 106: ...ain Resonator Shutter 0 OFF 1 ON Note Enter 0 if the main shutter is not installed s4 Branch Shutter 1 0 OFF 1 ON s5 Branch Shutter 2 0 OFF 1 ON s6 Branch Shutter 3 0 OFF 1 ON s4 Branch Shutter 4 0 OF...

Page 107: ...s occurred b HV is turned off c The capacitor has not been charged to the set voltage d The system is not selecting external communication control 3 Valid for communication line control only Return NA...

Page 108: ...released from the error schedule 3 Valid for communication line control only Return NAK for other control modes 8 Total count reset command Code C 1 Host Computer Side S T X C H 1 C H 0 C 1 E T X B C...

Page 109: ...ts 2 After this command is received the laser unit resets the GOOD counter to 0 3 Valid for communication line control only Return NAK for other control modes 10 Reading an error Code R T Host Compute...

Page 110: ...000 99999999 Units 07 Good Count 00000000 99999999 Units 2 Data Under Each Schedule Data No Item Data Range Units 01 Pulse Width 003 100 0 1 msec 02 Charge Voltage 200 410 Volts 03 Dummy Shot Count 00...

Page 111: ...rror 06 Cooling water level low 26 Set up value too high 07 Conductivity caution 27 Fiber 1 error 08 Conductivity abnormal 28 Fiber 2 error 09 Preliminary discharge abnormal 29 Not used 10 Emergency s...

Page 112: ...define CR 0x0d define BS 0x08 define STX 2 define ETX 3 define EOT 4 define ENQ 5 define ACK 6 define NAK 0x15 define YES 0 define NO 1 define OK 2 define NG 3 define TIMEOUT 0X800 define S10DT 0x30...

Page 113: ...network e p1 gotoxy 1 3 cprintf input NETWORK 00 S 30 c getch if c 0 c 9 id 0 c putch c else goto p1 c getch if c 0 c 9 id 1 c putch c else goto p1 p2 gotoxy 1 4 cprintf NETWORK 5c c id 0 id 1 gotoxy...

Page 114: ...and type clreo x wherex y wherey n 3 gotoxy x y rs clr rs 0 0xoff 0 clear rs 0 STX rs 1 id 0 rs 2 id 1 while 1 gotoxy x y c getch if c CTLC exit 0 if c CR break if c BS x gotoxy x y cprintf n else put...

Page 115: ...aracter for n 0 rs n l ETX n putch rs n putch rs n cprintf tx ndat rs tx cnt send text rx_text receive data gotoxy 1 22 clreol spase gotoxy 1 23 clreol spase gotoxy 1 22 cprintf receive character if t...

Page 116: ...997 B 23 n x If c CR return Gotoxy x yc d set1 xc yc cnt t char xc char yc char cnt char t rs top address char c x n m gotoxy xc yc m 0 for n 0 n cnt control no x wherex c getch If c 0 c 9 putch c rs...

Page 117: ...c rs t i rs display the contents with decimal point dsp rsl t n char t top address char n data length char i for I 0 i n i if i 2 cprintf cprintf c rs t i set bcc Value of return is number of data se...

Page 118: ...nt n rts on for n 0 n cnt n rsout bf n send data rts off transmit id code tx id c char c rts on rsout id 0 ID code rsout id 1 rsout c ENQ ACK rts off transmit RENEWD program tx update p0 tx id ENQ sen...

Page 119: ...goto p0 receive until ETX is found rx text int n m ex unsigned int time char bcc n 0 ex 0 gotxy 1 17 clreol time 0 while 1 If time TIMEOUT break time If getsts if getch E return NG if getrssts receiv...

Page 120: ...K rs n NAK rs n 0 return OK else return NG bcc rs 1 for m 2 m n m bcc rs m if rs n I bcc return NG return OK receive id ack rx idack char n bf 3 c cprintf wait ID ACK for n 0 n 3 if getsts c getch if...

Page 121: ...type T outport SIOCS 0x07 RTS 0 RTS off rts off char c while inport SIOCS 0x04 0 txemp if getsts c getch if c CTLC exit 0 outport SIOCS 0x27 RTS 1 get console status getsts AH 0x0b function 0bh genint...

Page 122: ...ONS INTERFACE SPECIFICATION LW250 PULSED Nd YAG LASER 990 605 REV B May 1997 B 29 read a rs232c data rsin AH 0x03 function 03h geninterrupt 0x21 AH 0 write a data to rs232c rsout c char c AH 0x04 func...

Page 123: ...S Status Control Mode Read Schedule No S T X C H 1 C H 0 R S E T X B C C S T X S H 1 S H 0 c n t s1 s10 r d y E T X B C C 0 Laser Start Command S T X C H 1 C H 0 0 E T X B C C C H 1 C H 0 A C K or C H...

Page 124: ...m No 1 digit SH0 Schedule No 1 digit DT1 Data No 10 digit DT0 Data No 1 digit E1 Abnormality No 10 digit Transmit all abnormality numbers When no abnormalities E1 and E0 0 E0 Abnormality No 1 digit s1...

Page 125: ...LW250 PULSED Nd YAG LASER 990 605 REV B May 1997 C 1 APPENDIX C SCHEDULE DATA TABLE You may use the LW250 Laser Schedule Data Table on the following page to record the values set in each weld schedule...

Page 126: ...E DATA TABLE Item Setting Range Unit 0 1 2 3 4 5 6 7 Voltage 200 410 V Pulse Width 00 3 10 0 ms Rep Rate 0 to 10 PPS Shots 0 to 999 Dummy 0 to 99 High Energy 0 to 99 9 J Low Energy 0 to 99 9 J Number...

Page 127: ...LW250 PULSED N d YAG LASER 990 605 REV B May 1997 INDEX 1 Alphabetical Subject Index...

Page 128: ...l 2 2 Internal 2 5 Status panel 2 2 Cooler maintenance 7 1 Cooling system Air filter cleaning Components and controls 2 6 Draining cooling water 7 8 Filter replacement 7 1 Flow rate controller replace...

Page 129: ...Ion exchange resin cartridge replacement 7 2 I O signal interface 3 1 L Laser beam alignment 8 4 Laser beam emission control 6 12 Laser oscillator head 2 9 Laser oscillator head fitting removal 5 1 La...

Page 130: ...system 5 2 R Removing the laser oscillator head fittings 5 1 Replacing the cooling system filter 7 1 Replacing the flash lamp 8 1 R continued Replacing the fuses 8 13 Replacing the ion exchange resin...

Page 131: ...SER 990 605 REV B May 1997 INDEX 5 T continued Transistor input signals 3 2 Troubleshooting 8 13 Turning power ON OFF 6 1 U User maintenance 7 1 User maintenance precautions 6 1 W Waveform control 6 5...

Page 132: ...tle Manual Part No Date Rev Addendum Date REVISION RECORD Revision EO Date Basis of Revision A 17481 1 Add burn pattern adjustment procedure 2 Incorporate notes and illustration to clarify guide beam...

Page 133: ...put 000 Laser beam repeatedly fires until laser stop signal is entered Laser beam repeatedly fires until laser stop signal is entered or shot count expires whichever occurs first Page 3 8 paragraph ti...

Page 134: ...onator shutter MAIN SHUTTER 4 Place a sheet of black paper on the optical axis of the Nd YAG laser beam a short distance from and on the output side of the M4 mirror 5 Push the laser start switch The...

Page 135: ...ue direct aiming beam rather than a ghost beam check the burn pattern at the entrance to the input focusing unit refer to Burn Pattern Adjustment as previously de scribed in this chapter Page 8 8 X an...

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