AccurateCNC 360

[charliex]

The machine cuts stencil masks too.

But! i'm using an LTC LED part that i made the wrong footprint for a while ago, replaced it and checked it on paper, somehow i'd managed to let the old one slip in !

Sparkfun recently had added it to their library as well.

I'l spend some time laying it out better, then redo it and bust out the metcal.

[Jay C]

Charlie I'm reading your blog. Try carpet tape to hold your boards. Also, how about posting a photo of your V-bit and maybe a video of the machine in action

[Jay C]

Disregard, I see the vids on your blog now

[charliex]

I'll give carpet tape a try, I've been using wide sellotape without problems, after intially using masking tape.

I've posted up pictures of the bits. http://charliex2.wordpress.com/2009/...l-router-bits/ since they're quite large images i put them on wordpress.

[charliex]

After a break, I came back and had a go at another board with the full isolation removal, drilled and cut out. I didn't quite get the depth on the holes right, but they're almost all the way through.

its got some funky routing i know , probably broke most of the rules!

[Drools]

once again very nice, just how fine are the traces? they look to be .016 or about there maybe smaller. Is that 2oz copper?

[charliex]

cheers!, i've had enough practice this last week i set the drc to be 8mil minimum, 1oz copper board. its mg chemicals FR4 #503 1/16th

used a V45 set to 3mil depth

played around with the mitre on some of the traces, just to see how it'd come out. set a bad depth on one of the rubout's or i was using the wrong tool, i'm still building up my 'library' of tools. luckily the bad area doesn't affect the board.

i also tried to leave a tab in the cutout so the board doesn't come off, but i'm not yet used to just how small a 0.05 grid is!

[charliex]

I'm using a scotchbright ( well ace hardware) red pad to clean the PCB afterwards.

[charliex]

I'm back again with today's PCB, this time a corrected IC , mouser lists as SOIC-16 but clicking through its a SOIC-16DW, so made a part in eagle, and relaid it out.

I drilled this one pretty deep in the isolation rub out, and for some reason my mill line ended up cutting around the line instead of through it, but i was lucky in that it barely missed the trace.. the mill cut out was 50mil and my tabs were two grid spacings at 0.05, which was just a little bit too big, worked ok with a pair of side cutters though.

For my first few pcb's i'd found that the dimension layer was being traced out, so i switch that off and added a 0" wideth line in the mechanical/mill layer, that'd worked last time, but obviously i did something wrong.


same board type mg chemicals 2oz, 3x6" single sided with a V90 cutter 8mil. Haven't polished this one as well.

I did setup my 'tool table' in the software, which worked a lot better with the rubout since it calculates the area using the tools you have versus the tools you think are close enough !

Hopefully this board will actually be populated, for some reason i used 0805 resistors and 0603 capacitors..

The jpeg artifacts, suck so i'll redo it.