laser notes

master
Jeff Moe 5 years ago
parent 8a788adbe9
commit 818a5373d3

@ -31,8 +31,24 @@ This process is for one or two layer boards. You could make
stencils for more layers, but that is only useful if you have a stencils for more layers, but that is only useful if you have a
process to assemble PCBs with more than two layers. process to assemble PCBs with more than two layers.
J-Tech Photonics has some documentation about this process using
an ancient printer, Replicator G software (!),
and proprietary PCB software. See here:
https://jtechphotonics.com/?p=473
Note, from that blog post:
* "We will then need to shrink the pads and holes by about 2 mills to allow for the spot size of the laser beam on the stencil material when processing."
This step is not being done below. XXX
## KiCAD Steps ## KiCAD Steps
Do thusly: Do thusly:
* Open your KiCAD `.pro` file. * Open your KiCAD `.pro` file.
@ -141,7 +157,7 @@ In the task bar set `X:` to `0.000` and `Y:` to `0.000`.
* `Travel Speed (mm/min or in/min)`: `1000`. XXX confirm. * `Travel Speed (mm/min or in/min)`: `1000`. XXX confirm.
* `Laser Speed (mm/min or in/min)`: `500`. XXX confirm speed for transparencies. * `Laser Speed (mm/min or in/min)`: `600`. XXX confirm speed for transparencies.
* `Laser Power S# (0-255 or 0-12000)`: `255`. * `Laser Power S# (0-255 or 0-12000)`: `255`.
@ -225,13 +241,14 @@ Position the transparency in landscape mode, unless portrait mode is needed.
Bottom left of transparency should be in front left corner on Bottom left of transparency should be in front left corner on
printer. printer.
* Secure the transparency/paper sandwich to the aluminium plate and bed * Secure the transparency/paper sandwich to the aluminium plate and bed.
with three large paperclips. Use three large paper clips and/or tape.
* Slowly move toolhead to position where you want the bottom * 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 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). 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. Make sure the LASER will be past the paper clips and tape
holding the transparency in place.
* Power on printer. * Power on printer.

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