Using OneCNC XR4's high speed toolpaths to cut material that would normally be difficult to machine on a home-made CNC.
This is a 3/8" PCD endmill, helixing in and pocketing at full depth, 3/8". This eliminates potential binding from a slug, which could potentially break teh endmill (well not really potentially, it has happened already!
The high speed toolpaths allow me to go full depth and keep as constant a feedrate as possible, allowing my somewhat less-than-ridgid machine to do these cuts. The router actually lifts .00125" between rapids.
I built this machine using my old Solsylva CNC. Material 1" phenolic for the frame, 1/2" HDPE for the stepper mounts and bearing blocks, and 1/2" aluminum tubing for the stepper mount risers. All hardware store bolts and nuts used. Rails and bearing blocks are Rollon 43 series on X and Y, drill rod with skate bearings on Z. 1/2"-8, 8-start leadscrews, 425in-oz steppers, GeckoDrive G540 box made by DeepGroove1, Bosch1617EVS, controlled by SuperPID. 550ipm rapids on X, 720ipm on Y.
