LASER cut stencil

HOWTO/laser-solder-paste-stencil-inkscape.md

@@ -13,10 +13,6 @@ for now.
 * Graytex Papers "Clear Transparencies for Color Laser Printers" (P/N 235-8511).
 5 mil (0.127 mm), clear.
 
-This assumes the J-Tech Photonics LASER is set up and the TAZ is
-flashed with Marlin firmware from here:
-https://code.forksand.com/forksand/marlin-lulzbot-laser
-
 ## Software Used
 
 * Debian.
@@ -181,3 +177,95 @@ sane. Not sane values: `G1  X13004. Y-23242.76`. Sane values:
 * Hit `Close` button.
 
 * `File` --> `Quit`.
+
+# LASER
+
+## Setup
+This assumes the J-Tech Photonics LASER is set up and the TAZ is
+flashed with Marlin firmware from here:
+https://code.forksand.com/forksand/marlin-lulzbot-laser
+
+
+The build plate should be a 6mm thick (XXX check number)
+aluminium plate on top of the printers' bed. The printers'
+heatbed and glass should be removed.
+
+
+Make sure there is very good ventilation.
+
+
+* Perhaps add a gcode header/footer to the file.
+
+* Copy the new `.gcode` file to SD card. Such as:
+```bash
+sudo mount -o uid=1000 /dev/sdc1 /mnt
+mkdir /mnt/awesome/
+cp awesome.gcode /mnt/awesome/
+sync
+sync
+sync
+sudo umount /mnt
+sleep 5 # make sure the SD card has time to write before removing
+```
+
+* PUT ON PROTECTIVE EYE WEAR!
+
+* Power off LASER.
+
+* Disable LASER by removing key.
+
+* Power off printer.
+
+* Insert SD card into printer.
+
+* XXX Tape transparency and paper together? XXX
+
+* Place the transparency on top of THREE blank sheets of paper.
+Position the transparency in landscape mode, unless portrait mode is needed.
+Bottom left of transparency should be in front left corner on
+printer.
+
+* Secure the transparency/paper sandwich to the aluminium plate and bed
+with three large paperclips.
+
+* Slowly move toolhead to position where you want the bottom
+left corner of the stencil to begin (e.g. X=0, Y=0 of the stencil). It is
+probably best to have a margin of 50mm around the edges (XXX number). 
+Make sure the LASER will be past the clips holding the transparency in place.
+
+* Power on printer.
+
+* Make sure the Z height of LASER toolhead is good with jig.
+Jig should be 40mm tall (XXX check number). It is presumed the LASER
+has good focus at the toolhead jig height.
+
+* If Z height needs adjustment, in printer LCD, go to Z movement
+and move to the correct height. (XXX menu sequence).
+
+* BE SURE TO PUT ON PROTECTIVE EYE WEAR!
+
+* Turn key on LASER to enable.
+
+* Power on the LASER via the power switch.
+
+* If fan on the LASER PCB doesn't start, press `RESET` button on PCB.
+
+* NOTE, LASER WILL TURN ON IN NEXT STEP!
+
+* In printer LCD, go to print from SD card, and print the gcode file
+generated above.
+
+* Time to cut depends greatly on board complexity, but in general
+it's less than 30 minutes.
+
+* Power off LASER.
+
+* Disable LASER by removing key.
+
+* Power off printer.
+
+* Remove paper clips.
+
+* Remove stencil.
+
+* Compare stencil to PCB.