On 12/06/2013 12:23 PM, Ron Bean wrote: ... snip > Instead of photo resist, we use black spray paint, and etch the paint > away with a laser cutter. > > We've tried cutting circuit boards with a CNC engraving machine, with > varying results. The main problem seems to be keeping the board > absolutely flat-- it tends to warp, and then you don't get a consistent > depth of cut. There is a method of "height mapping" the board ahead of > time, and using the computer to compensate while engraving. I don't know > the details, but it does seem to work. I think it's a plug-in for Mach3. > Very careful mounting might also work.
I have been thinking of using paint resist but engrave the resist off, which might work if the Z variation is within the copper thickness. I guess the engraving mill would also need to have vertical sides too - maybe not such a good idea. I have tried laser printer/iron-on transfers but this isn't very accurate and not good enough for two sided boards. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ Sponsored by Intel(R) XDK Develop, test and display web and hybrid apps with a single code base. Download it for free now! http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
