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Export DXF - Edge_Top and Edge_Bottom - DLP 3D printer for PCB etching

Posted: 29 Jul 2020, 07:25
by MarkEd
Hello

Please add ability to set "Edge Width:" to negative value(for example -0,05mm or -0,1) in "export DXF" - Edge_Top and Edge_Bottom layer.
This would be useful for PCB etching with DLP 3D printer.

Using DLP 3D printer for PCB etch - surprising results:
https://www.youtube.com/watch?v=-Qeq7ZgUOuE

My results:
Etching.jpg
Track and pads are to wide. Edge Width = -0,05 in dxf export would probably be perfect.

Re: Export DXF - Edge_Top and Edge_Bottom - DLP 3D printer for PCB etching

Posted: 06 Nov 2020, 03:30
by Alex
We will consider allowing negative value in Edge Width but it seems counterintuitive in most cases therefore the software changes negative value to minimum positive one.

Re: Export DXF - Edge_Top and Edge_Bottom - DLP 3D printer for PCB etching

Posted: 15 Nov 2020, 13:50
by MarkEd
It would be great if it would show up in the next version.
It is probably counterintuitive when milling, but it would do the job with UV exposure.

Re: Export DXF - Edge_Top and Edge_Bottom - DLP 3D printer for PCB etching

Posted: 14 Mar 2021, 03:26
by Mishal21
MarkEd wrote:
15 Nov 2020, 13:50
It would be great if it would show up in the next version.
It is probably counterintuitive when milling, but it would do the job with UV exposure.
It's something I've considered but haven't done yet. I'm not sure if you planned it or not, but abating a coating of acid resist (aka black spay paint) with the laser and then dipping the board in acid would be much less expensive than using the laser alone. Lasers printerhow with more than 500mW become prohibitively costly, and copper is an excellent heat conductor.

You'll need to work out a way to match the two sides if you want double-sided boards. The unit is incapable of drilling holes.

You should be aware of the horizontal resolution. It's probably good, but it'd be a pain if you didn't have the requisite resolution.