My first tiny PCB with Shapeoko

PsyKo
Posts: 430
Joined: Thu Aug 30, 2012 8:42 pm
Location: France

Re: My first tiny PCB with Shapeoko

Post by PsyKo » Wed Nov 21, 2012 8:21 am

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.
Shapeoko #736
Kress 800, Z Axis upgrade, dual Y, 600mm X&Y rails, metal spacers and V Wheels, home switches, 4th axis
Goko - Free CNC Control Software - http://www.shapeoko.com/forum/viewtopic ... 380#p44380

fito
Posts: 79
Joined: Thu Aug 09, 2012 5:45 am

Re: My first tiny PCB with Shapeoko

Post by fito » Wed Nov 21, 2012 7:50 pm

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.
Adolfo Cortés
ShapeOko 649

PsyKo
Posts: 430
Joined: Thu Aug 30, 2012 8:42 pm
Location: France

Re: My first tiny PCB with Shapeoko

Post by PsyKo » Thu Nov 22, 2012 8:18 am

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 :)
Shapeoko #736
Kress 800, Z Axis upgrade, dual Y, 600mm X&Y rails, metal spacers and V Wheels, home switches, 4th axis
Goko - Free CNC Control Software - http://www.shapeoko.com/forum/viewtopic ... 380#p44380

kelly45
Posts: 1
Joined: Thu Sep 13, 2012 9:35 am

Re: My first tiny PCB with Shapeoko

Post by kelly45 » Wed Dec 19, 2012 3:36 am

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.
_______________________________
printed circuit board manufacturer

Post Reply