MPCNC Burly Roland Cutter Mount

thingiverse

I tried out a few different Roland cutter mounts for the MPCNC, and they work great for thinner material, but most of them are outset from the z axis too much so when cutting thicker material like cardstock, you get some deflection and stress on the printed parts which can result in inconsistencies in cut. The purpose of my design was to bring the cutter as close to the center of the Z axis as possible. I achieved this by designing my own Burly mount that has a channel into which a 2 1/4" length of 1/2" copper pipe fits snugly. The parts required that are not printed are a length of 1/2" copper pipe about 2 1/4", a brad nail, and a spring from a ballpoint pen. Due to calibration differences between my printer and yours, you may have to sand down the parts to get a good fit. I put a daub of bearing grease on the "cutter sleeve" part to aid in fluid movement inside of the pipe. Note that the Roland cutter needs to be taken out of its threaded adjustment sleeve and then threaded into the 3D printed "cutter sleeve". In the photo of my assembled unit, you can see I used some kapton tape to provide a friction fit for the cap in the pipe.