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ldgraphy [2020/11/07 21:01] – yairldgraphy [2020/11/11 02:10] (current) – yair
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 first go\\ first go\\
 {{ldr-003.mp4}} {{ldr-003.mp4}}
 +
 +
 +===TODO===
 +find out what's up with the Y axis galvo. it gets very hot when on and doesnt move. 
  
 ===hardware=== ===hardware===
 Shih [[http://tribe-against-machine.org/wiki/tiki-index.php?page=Maskless_Photolithography_with_Conductive_Fabric_and_DIY_Laser_Galvanometers|notes]], similar to [[https://github.com/hzeller/ldgraphy/blob/master/design.md|ldgraphy]] Shih [[http://tribe-against-machine.org/wiki/tiki-index.php?page=Maskless_Photolithography_with_Conductive_Fabric_and_DIY_Laser_Galvanometers|notes]], similar to [[https://github.com/hzeller/ldgraphy/blob/master/design.md|ldgraphy]]
  
-the scanner set if PT-A40+ 
 +the scanner is PT-A40
  
 {{:pasted:20201107-143303.png?400}} {{:pasted:20201107-143303.png?400}}
  
 {{:pt-a40.pdf|manual for PT-A40}} {{:pt-a40.pdf|manual for PT-A40}}
 +
 +
 +
 +what's inside?
 +
 +{{youtube>HIBH55cbfLM?medium}}
 +
 +AlliExp stroe (not he one sent)- https://gzsevenstarlight.aliexpress.com/store/3904033\\
 +pro ThorLAB - https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3770 \\
  
 **Basic Tuning**\\ **Basic Tuning**\\
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   * Connect computer with ILDA test pattern, run it at approx. 20kpps.   * Connect computer with ILDA test pattern, run it at approx. 20kpps.
   * Power on the amplifiers.   * Power on the amplifiers.
-  * Slowly open the servo gain (clockwise). The mirror of the galvo should move now to its middle position. If yes, turn two rounds clockwise. +  * Slowly open the **servo gain** (clockwise). The mirror of the galvo should move now to its middle position. If yes, turn two rounds clockwise. 
-  *  Slowly open the size until you see the galvo moving. +  *  Slowly open the **size** until you see the galvo moving. 
-  *  Increase servo gain until you see overshoots. Correct it with LFD. +  *  Increase **servo gain** until you see overshoots. Correct it with **LFD**. 
-  *  Decrease undershoots by opening the HFD pot slightliy clockwise. Remove gain/LFD procedure and correct with HFD, until you the picture looks satisfying. Carefully fine tune the driver. The better your fine tuning is, the faster is the scanspeed.+  *  Decrease undershoots by opening the **HFD** pot slightly clockwise. Remove **gain/LFD** procedure and correct with **HFD**, until you the picture looks satisfying. Carefully fine tune the driver. The better your fine tuning is, the faster is the scanspeed.
   * Increase speed of test patterns and readjust for optimized picture   * Increase speed of test patterns and readjust for optimized picture
  
 +{{:pasted:20201107-194611.png?500}}
  
 ===software=== ===software===
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 maybe [[http://www.axoloti.com|axoloti]] if i had it.  maybe [[http://www.axoloti.com|axoloti]] if i had it. 
 +===diy=== 
 +{{:pasted:20201111-001008.png}} 
 +http://elm-chan.org/works/vlp/report_e.html