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Re: My first tiny PCB with Shapeoko

Posted: Wed Nov 21, 2012 8:21 am
by PsyKo
Hello
levlandau2 wrote: So when the PCB is flipped, the corresponding CAD have to be flipped as well right?
Yes it has to be flipped. Usually you can check the flipped option in your CAD software. I didn't try with eagle but it generate one gcode file for the PCB seen from the top and from the bottom. I don't knwo if they are flipped by default. But this problem exist even with DIY chemical etching.
levlandau2 wrote: Also what happens to the 0,0 alignment at this point, assuming one did not start at the extreme edge of the PCB??
This depends on the CAD Software and how you generate the GCode from your PCB file. I actually never tried to mill double faced PCB, so I can't really help you on that.

The best thing to do is to try on a piece of paper with a pen instead of your regular spindle. Depending on the result, you will be able to fine tune your settings.

Re: My first tiny PCB with Shapeoko

Posted: Wed Nov 21, 2012 7:50 pm
by fito
I think the first place to start is to define how you are securing your pcb to the waste board. If you put mounting holes on the pcb and use them for alignment you should be able to flip the board and use the mounting holes to align the board for the second pass. Then it is just a matter of having a repeatable home position.

Re: My first tiny PCB with Shapeoko

Posted: Thu Nov 22, 2012 8:18 am
by PsyKo
fito wrote:I think the first place to start is to define how you are securing your pcb to the waste board. If you put mounting holes on the pcb and use them for alignment you should be able to flip the board and use the mounting holes to align the board for the second pass. Then it is just a matter of having a repeatable home position.
That sounds like a good idea. The only thing to take care about is to make sure the safe Z height is above the screw that hold the PCB, otherwise the engraving bit will eventually collide with them.
I will give it a try next :)

Re: My first tiny PCB with Shapeoko

Posted: Wed Dec 19, 2012 3:36 am
by kelly45
Your design is really good. Well done man. I am also in the phase of designing a PCB prototype nad will share it with you once i am done with my design.
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