turbotrack card tunings - Lighting Systems Design, Inc.
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1. suid 76 5 y 2 5910 SI V N OF 6 8 VIN 9 VIN Jauueos E 19 1 0 UONISOG 1284 01 qns q 3 8 11 12 13 10 14 15 Notes Amplifier Side D Sub 15 pin male 10 Feet Position GSI AGC out Position GSI AGC in Position Gnd Galvo High Galvo Low Scanner Gnd N A N A N A N A N A N A N A 2 conductor cable with shield drain 24 gauge 4 conductor cable with shield drain 24 28 gauge All pins gold flash Shield drain from 2 conductor cable should isolated from shield drain from 4 conductor cable Use heatshrink tubing every 12 to secure 2conductor and 4 conductor wires to each other along 10 feet 6 D Sub 15 pin connectors to have back shell PONS Scanner Side D Sub 15 pin female 3 8 11 12 4 2 13 10 14 15 Position GSI AGC out Position GSI AGC in Position Gnd Galvo High Galvo Low Scanner Gnd Galvo Low Galvo High N A N A N A N A N A Lighting Systems Design Inc G120 Scanner Cable TITLE General Scanning G120 Scanner Cable For Turbo Tr2. and 28 Volts DC as a maximum LSDI recommends a minimum continuous current rating of Amperes When running 6800 series scanners a higher current capacity is desirable Best performance comes with the use of a regulated power supply however a raw DC supply transformer full wave bridge rectifiers and filter capacitors will also work well Switch mode supplies can also be used COOLING The power output stage of the TurboTrack2 uses the LM12CLK from National Semiconductor This is a power operational amplifier that can dissipate 150 watts of power For this reason it is highly recommended that the TurboTrack2 be fan cooled wherever possible The large heat sinks are constructed of industry standard Aavid heat sink material but some air flow is essential for reliable operation This is particularly important when the amplifier is mounted a chassis or rack mount enclosure Turbo Track2 Adjustments The TurboTrack2 is a 2 channel card It also gives the user the ability to have 2 different tunings on each an tuning and B tuning In practice this lets the user set one tuning for type of scanner and the second tuning for another type of scanner or set both tunings for the same scanners but different speeds i e 12 000 points per second and 24 000 points per second There are several useful combinations available No matter the scanner models or designated use for each tuning the adjustments are the sam
3. GZ9OV 7 y uano Jey 4031 ey y 10 pue uoljeigyeo 5 137 95 a fs LHDIY HOLIMS ALIWV10d 1 800 35 1431 SOYyoUMS 19 25 10 ZHOVHYLOGYNL 9 Rev 10 10 01 GSI Mode Pre emphasis OFF x lt lt LLI I GSI Mode Scanner tuning DIP switches Power terminal block CT Mode Pre emphasis ON CT Mode GSI Mode POLARITY SWITCH TRIM POTENTIOMETERS TURBOTRACK2 CONFIGURATION MAIN ELEMENTS REV 1999 07 10 HEAT SINK KEY Power output stage LM12CLK Output connectors DB 15 female Input connector DB 15 male Fuses 3AG type Fastblo GSI General Scanning GSI Luminonics CT Cambridge Technology WARNING Before changing any scanner settings or tunings on T2 card turn power to the card OFF You risk damage to T2 card or scanners if power is not turned off before changing settings Pre emphasis can be turned on or off when card is powered up Rev 10 10 01 Pag
4. T2 Turbo Track versions 2 0 and 2 0b Maximum Performance Servo Amplifier for Galvanometer Scanners Lighting Systems Design Inc 4625 Winter Garden Road Suite A 2 Orlando Florida 32811 1777 U S A Phone 407 299 9504 Fax 407 299 3965 www lsdi com This page intentionally left blank TURBOTRACK2 SCANNER DRIVER AMPLIFIER INTRODUCTION The TurboTrack2 T2 is a dual channel servo amplifier designed for use with optical scanners In the laser display industry the most commonly used models of scanner are the G 120D or DT from General Scanning and the 6800 series scanner from Cambridge Technology T2 is a two layer printed circuit board measuring 9 inches by 9 inches Large heat sink fins are attached to each side of the card increasing the board s footprint to 9 5 inches wide by 9 inches in length by 2 5 inches in height Fan cooling of this card will greatly increase its performance characteristics as well as prevent overheating of some power components The following features summarize the most important design benefits of the TurboTrack2 scanner driver amplifier Angle Intelligence H bridge drive High low frequency damping for the 6800 series scanners Input signal limiting Position and velocity outputs A utomatic G ain C ontrol for position transducer Output current limiting Dual controls for high speed low speed operation Differential inputs Input polarity switching Signal pre emphasis P
5. ack Amplifier SIZE A CODE DWG NO IREV GS 010731 Orlando Florida SCALE None SHEET John Robert Birchman 1of1 T ILDA compatible input connector pinouts on T2 rack mount unit 2004 Green Blue 1 17 Rev 10 10 01 Signal ILDA _ ____ O 4 interlock A Bedr e _ Bue 8 DeepBle elows 12 Notconnected 8 47 8 20 DeepBlue 22 2 25 NEOS ILDA compatible connector pinouts on T2 rack mount unit com 18 Rev 10 10 01 Pin number __ a es a VERSION NOTES FOR STAND ALONE CARD This User s Manual references the TurboTrack2 servo amplifier versions 2 0 and 2 0b Version 2 0 of the T2 card incorporated 2 bi color LED s at the input side of the card to indicated the presence of current going through the circuit Version 2 0b of the T2 card incorporated 8 diodes at the output side of the card located between the 2 fuses If you have an older version of 2 without LED or diode modification please contact Lighting Systems Design Inc for information on adjusting your card s scanner tunings Page 19 Rev 10 10 01
6. cur If you are trouble shooting a no scanning problem and you have verified a good signal going to your scanners be sure to check the servo gain adjustment Adjustment Procedure Cambridge Technology As the Cambridge Technology s 6800 series scanners 6800H and 6800HP do not have a torsion rod or other center return mechanism the scanners may be directing the beam to most any direction when not energized When beginning the calibration procedure the scanner will suddenly move to the approximate center when the servo gain is sufficient to drive the scanner The oscilloscope digital voltmeter centering procedure may be done with the scanners disconnected from the board Scan square wave test pattern at a vector speed of 9 10 kHz Make sure ail trimpots are fully counter clockwise except the position offset which should be approximately centered Power up the amplifier Turn input gain eight turns clockwise Slowly adjust servo gain until scanner begins to operate Adjust damping to correct overshoot Normal damping affects large changes Hi damping is used to correct small errors in conjunction with the normal damping Hi damping corrects errors of high spatial frequency Increase input gain until image is about 1 2 size Repeat steps 1 4 for the opposing axis gt Adjust servo gain to increase speed compensate with damping Use both Hi and normal damping to optimize velocity profile gt Once the system is op
7. e 10 HOLIMS AHL AO 401 AHL 55 GA0V 1d VIA HSHLADOL SSHOLIMS TIV SVH LVHL HOLIMS did NOILISOd JHL 30 TIVLAG SI SIHL OL SHL YOLVOIGNI TVOINSINNN GYVMOL GAHSNd 16 HOLIMS JHL NOILISOd IHL HOLIMS 30 AHL ALON ASVA 1 AHVO 2 1 8 JHL 0381 HOLIMS NOILISOd AHL 30 TIVLAG SI SIHL Rev 10 10 01 Page 11 TURBOTRACK CARD TUNINGS THIS IS A TUNING NOTE DIRECTION OF ON ARROW DB15 INPUT CONNECTOR THIS IS TUNING DB15 INPUT CONNECTOR Rev 10 10 01 Page 12 alle 330 15 AGOW 1 Car 5 25 OL LON SIHL SONINNL AHVO 440 siseyduid aid AGOW 5 Rev 10 10 01 Page 13 Front of enclosure AC indicator light DC power switch Heat Sink Fan Heat Sink Bridge rectifier Notes AC indicator lights shows that AC power is on DC power switch can
8. e for each axis The primary adjustments are as follows position offset input gain servo gain damping high damping These adjustments are made via 15 turn trimmer potentiometers located at one end of the T2 card There are two sets of potentiometers for each axis representing the A tuning and the B tuning capability of the circuit Page 4 Rev 10 10 01 From the outside of the card inward the order of adjustments is as follows position offset input gain servo gain damping and high damping The trimmer potentiometers are separated in the middle by toggle type DIP switch Graynhlll p n 76STDO2 This is the scan polarity inversion switch Use this switch to change the left right up down orientation of the laser graphic image Other adjustments available to the user are DIP switches located above and perpendicular to the trimmer potentiometers These ganged DIP switches Grayhill p n 78B04 can be selected to use either General Scanning or Cambridge Technology scanners as well as select the A tuning These controls can only be accessed from the top of the card There are two additional top adjust trimmer potentiometers on the T2 both for use with the CT16800 series scanners One is Position Scale and the second is Position Balance These are set at the factory and should not require further adjustment Before performing any adjustments verify that ail supplemental components are opera
9. osition scale and balance for 6800 series scanners DC offset bi color LED indicators VVVVVVVV VV Most important for the laser display user is TurboTrack2 s stable performance at high speeds Extensive testing has shown that the ILDA test pattern can easily be scanned at 24 000 vectors per second at a scan angle of 20 degrees optical using G120D scanners INPUT CONNECTOR The input to TurboTrack2 is DB 15 male connector Differential are recommenced If single ended or unbalanced inputs are used both negative inputs should be tied to signal ground Simultaneous position velocity and drive current signals are also available from the input connector OUTPUT CONNECTOR The output connectors are both DB 15 female These are directly compatible with General Scanning G120D scanners Cambridge Technology s scanner cable design requires a modification to replace the DB 9 connector with a DB 5 male connector Page 3 Rev 10 10 01 Whereas the General Scanning G120D scanners are driven with the H bridge the 6800 series scanners achieve more stable performance with single ended drive Galvo low is therefore tied to ground for operation with the 6800 series scanners see diagram page 15 DB 9 to DB 15 adapters are not recommended Scanner cables can be up to 0 feet without any visible diminishing of scanner performance POWER SUPPLY The TurboTrack2 requires a bipolar supply of 20 Volts DC as a minimum
10. timized increase input gain for full size The ILDA or Auratech test pattern is recommended If the interior circle begins to distort maximum size has been reached Reduce gain to the point just before distortion occurs gt Set input polarity for the correct orientation Adjustment Procedure Mode Selection There are several DIP switches accessible from the top of the TurboTrack board These should only be switched with the power OFF This is very important as damage to the board or the scanners may result otherwise These switches are shown on a diagram accompanying this manual 6 10 10 01 There are four 4 ganged DIP switches at the front of the TurboTrack card for selection of different amplifier tunings On each side only one switch bank should be in the ON position Looking at the card from an end on view ON is away from the user OFF is toward the user The outside bank A affects the outside four adjustment potentiometers input size servo gain normal damping and high frequency damping The position offset controls at the outer edge of the card are not affected The inner bank of controls accessed by the B switch are identical to the A controls The dual adjustments allow for many possibilities for example gt High speed scanning versus lower speed scanning gt General Scanning versus Cambridge Technology gt Main scanner set and spare scanner set In the center of the T
11. ting normally i e power supply Scanner connections or input signal to the scanner amplifier Adjustment Procedure General Scanning Scan a square wave test pattern at a vector speed of 9 to 0 kilohertz Make sure ail trimpots are fully counter clockwise except the position offset Center the position offset Connect an oscilloscope or a digital voltmeter DVM to the position outputs Remove the fuses Apply power to the amplifier Adjust the position offset for 0 volts each axis Turn off power to the amplifier and replace the fuses in the fuse clips Re apply power to the amplifier Turn input gain eight turns clockwise Slowly adjust servo gain until scanner begins to operate Adjust damping to correct overshoot Use only normal damping do not use high frequency damping as damage to the scanners or the board may occur Increase input gain until laser image is about 1 2 size Adjust servo gain to increase speed then compensate with damping Once the system is optimized increase input gain for full size The AURA Technologies test pattern is recommended If the interior circle begins to distort maximum gain has been reached Reduce gain to point just before distortion occurs gt Set input polarity toggle DIP switch for correct image orientation VVVVVVVVV VV Page 5 Rev 10 10 01 NOTE Servo gain control on T2 is a true servo gain With this control turned down counter clockwise no scanning will oc
12. turn DC power on and off to card Card is fused with a 2 Ampere fast blo fuse Fan Back of enclosure TURBOTRACK2 Enclosure Top View Fuse Power Entry Module Lighting Systems Design Inc 4625 Winter Garden Road Suite A 2 Orlando Florida 32811 1777 U S A Phone 407 299 9504 Fax 407 299 3965 www 1 sdi c om Rev 10 10 01 Page 14 W 10 uyor 133 8 3172 4 ON 3009 9 328 104 2 0089 JILL LZJNVO 16010 10 oul V N V N V N JOJO JOJO L INO 99V ld L Z8EZ0L 94 79 199 01 19 10 76 5
13. urboTrack are four more ganged DIP switches These are the primary controls to switch from GS Operation to CT operation Ail switches to the outside of the card is General Scanning mode ail switches to the center of the card is Cambridge Technology mode Please see the TurboTrack2 configuration diagram in this manual Closes to the fuses are two 2 quad DIP switches SW 181 182 381 and 382 are used to add pre emphasis to the command signal This increases the effective bandwidth of the scanners by as much as 6 kHz For example if the scanners are tuned for 24K points per second operation switching on pre emphasis will allow them to run images digitized to run at 30K SW SB and SC are on for ail modes of operation SW 222 and 422 are off for GS Mode and on for CT mode This is output stage compensation for the 6800H and 6800HP scanners Page 7 Rev 10 10 01 Connector pinouts on T2 stand alone card INPUT CONNECTOR D Sub Miniature 15 pin male Pin Number 1 X axis positive pe 2 3 14 0 1 5 1 Page 8 Rev 10 10 01 OUTPUT CONNECTOR D Sub Miniature 15 pin female Pin Number GSI General Scanning AGC out 12 GSI General Scanning AGC in 5 lt 96 662 LOT 9 WSN LLLT TT8ZE opue ZV SINS
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