got a package in the mail from Shih Wei Chieh

unpacking\\
{{dlr_unpacking.mp4}}

first go\\
{{ldr-003.mp4}}


===TODO===
find out what's up with the Y axis galvo. it gets very hot when on and doesnt move. 

===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]]


the scanner is PT-A40

{{:pasted:20201107-143303.png?400}}

{{: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 adjustments\\
The driver board comes already pre adjusted for 3 projection angle and needs to be set up for\\
the galvo only in small areas. Every galvo is different, so 3 of them adjustments are needed. For\\
this, the ILDA test pattern is used ,also a setup of the galvos in XY with a laser . If you need to\\
tune the driver faster to smaller angles, follow the procedure below . Also if the driver is totally\\
deadjusted , this will be the procedure to retune it :

  * Size, Servo-Gain, Damping und HF-Damping are adjusted counter clockwise to their left zero position. Now turn LFD 5 full rounds clockwise to right.
  * Connect computer with ILDA test pattern, run it at approx. 20kpps.
  * 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 **size** until you see the galvo moving.
  *  Increase **servo gain** until you see overshoots. Correct it with **LFD**.
  *  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

{{:pasted:20201107-194611.png?500}}

===software===
[[https://gitlab.com/greenhouseinfo/max-svg-laser-cutter|greenhouseinfo/max-svg-laser-cutter]] \\
and idiot.io [[https://github.com/idiot-io/laser-dye|lasyer-dye fork]]

===control===
needs 3 channels of audio to control X/Y/PULSE\\
jack got me [[https://lexiconpro.com/en/products/alpha|this]] to test

"has 1 stereo out and 2 mono"\\
{{:pasted:20201107-071411.png?500}}

maybe [[http://www.axoloti.com|axoloti]] if i had it. 
===diy===
{{:pasted:20201111-001008.png}}
http://elm-chan.org/works/vlp/report_e.html