Maybe this is a stupid question, but what did you use to generate the gcode from the dxf file? I'm a bit new to CNC routing, and none of the tools I normally use seem to handle the "point" entities within dxf files.

Just wanted to let you know that I made one of these. Spent the better part of a Saturday working it out mostly because I had to redraw all of the parts to work with .020" plywood and a shorter bolt.

Once I got it put together it worked very well. I used the 13 hole indexing wheel and may eventually do another with the 14 hole wheel. I don't have my electronics around yet, however feeding the filament into the extruder and turning the wheel by hand it takes considerable force to make it slip
.

When it does it chews a large chunk out of the plastic. Still the little lobes are more squared off then I would like and I fear it may be gripping the plastic only on the edges of the cuts.

All in all I spent 1 day, 1 night, and about $15.00 in supplies for something that I could have bought f
or $7.00 ;) Ah, but I learned so much by working through your drawings and checking out your EMC gcode and now I possess the special ability to hob bolts.

Thanks, so much for sharing, and check out my pictures to see the sparks!!!

Anyone tried which indexer works best?

thx

The picture with the failed part gives me the impression that teeth walls were too thin. Wouldnt like ~2 mm meat on them would make them less likely to fail? What is the number of teeths you finally settled? Or what teeth thickness which is the other way around?

now for someone to make a printable version...

Nice name!