Hello all! I started this project almost exactly 2 years ago, and after lurking in the forums for a couple of years and slowly making progress on my MPCNC, I’ve finally got it moving! I have decided to call my machine “Jack”, because I always intended it to be a Jack-of-all-trades (master of none). My goal was to do milling, laser etching/cutting, drag-knife cutting and also large 3D prints. So against all recommendations, I made a fairly big 24" x 18" x 8" usable area machine with 1" stainless tubing and dual endstops. My router is a Bosch Colt GKF125CE that I got on sale awhile ago, with a 1/8" collet from elairecorp.
I stumbled upon a failed 3D printer project on craigslist that provided me with the steppers, RAMPS, leadscrew and a bunch of other bits and pieces for super cheap, so that got me on the way. The rest of the hardware was mostly from Aliexpress, Homedepot and a local electronics store.
With wanting to be able to do all sorts of things with this machine, I decided it might be easier to have 2 sets of firmware; one for CNC/laser, one for 3D printing. To do this, I used 2 control boards; RAMPS for CNC, Fysetc F6 (6 driver board) for 3D printing. To easily swap between the two boards, I put in a bunch of mechanical relays to swap steppers and switches etc. between the two. Thus far, that hasn’t seemed to hurt anything (other than the time it took to wire the whole works), but I haven’t tried the F6 board yet.
Having taken so long to build, I went through the 525 prints, then did the Burly prints, and if it weren’t for the pandemic, I might have also had the Primo prints done before finishing! One hiccup that I came across though is that my tubes that were advertised as 1.000" OD, were actually 25.8mm (1.016"). Everything fit together, but it was pretty tight and “crunchy”. I decided to reprint a few parts, egging the bearing holes about 0.2mm outwards in Tinkercad, and it made a big difference!
Crown test came out great, and the rulers were dang good too. A little backlash as a couple of belts were looser than others. Also it appears my spoilboard isn’t exactly level. I guess the best way to deal with that is to get a surfacing bit and face the whole board? @forcerouge controller is pretty sweet jogging things around.
I just so happened to lend my router to a friend last week, so I can’t get things dirty yet, but soon!