One more drill press

thingiverse

One more drill press is needed with 3 pieces of 8mm rod and 6 linear bearings for future stepper feeding. I'm tired of breaking thin drill bits on simple printing drill presses. I drew up and made my own, a wooden one. 3 pieces of 8mm bearing material, 6 linear bearings. I let go of one end of each bearing and threaded it with a screw thread. The bearings are secured with nuts in a metal plate according to the pattern of the upper lid. The plate and table were screwed to the 20mm plywood base, which was then installed on rubber legs. The upper lid is held by rings with fixative screws. It can be attached in any way, even directly to the bearing or some other way. The central cross member has a mounting place for the nut of the feed screw. The upper lid has a mounting place for the NEMA17 stepper motor. I had an idea to make the feed from the stepper motor with feedback through a tensometer. But it didn't work out - the response time of the tensometer is such that the Arduino controls the stepper motor with jerks, which is not good for drilling. So, I'm controlling the feed by hand for now. Maybe I'll do without feedback later. I also had an idea to install two laser lines for aiming. But all available ones are so wide that twice the width of the 0.3mm drill bit is covered. In the SCAD files, as usual with me, everything is in parameters. We comment/uncomment modules after describing variables for choosing what to print.