Since switching from milling PCBs to etching them, one of the most awkward steps is getting accurate alignment for drilling and cutting out the boards. Mounting a camera on the spindle isn’t an original idea, but after sporting some tiny endoscope cameras on eBay (10mm dia, 40mm long) I thought I’d give it a go. A good excuse to use the new lathe too.
The design is pretty simple. I drilled out some aluminium bar stock to 12mm, with one end slightly narrower and tapped to M12. Then I turned down a M12 bolt to for in the 3mm collet I use with my end mills. A slot at the top is for the USB cable and two sets of three nylon screws allow for accurate alignment.
As you can see, a Mach3 video plug in makes it very easy to set the origin on a PCB or other work. Unfortunately it’s a bit long so there’s only just enough room to use with flat stock. I considered mounting it to the side of the spindle (with a known offset) but that didn’t seem right. A more compact version 2.0 is already planned using just the guts of the camera.