MPCNC Primo Z Cable Chain Mount

thingiverse

[Edit: Also check out version 2 of my z chain mount for an alternative configuration. It uses a wedge to anchor to the inside of the z tubes from the top. https://www.thingiverse.com/thing:4705663] I made this thing to hold cable chain to the z-axis of my MPCNC Primo, with added vertical clearance for a 1" aluminum L-channel chain support bridge. It uses one M3x16 bolt and nut (captured) on the clamp, and a ziptie to hold the end chain link. No supports are required. The part has a high aspect ratio and smaller footprint, and the CG lies well outside that footprint. So printing with brim is highly recommended. Also there are areas with very short layer time. So you may need cooling unless there are other parts on the build plate that have long enough layer times. I printed in solo, in PETG, with 18% cooling max at layer times under 40sec. My part fan is strong... ymmv. Note I am using one of the common Primo z-cable chain bridges found on TV; the kind that uses 1" 'L' profile Aluminum to support the Z cable chain along the X or Y axis. Similar MPCNC Primo z-cable mounts were too low to where they interfered with the cable chain bridge at lower Z values. With this sort of cable bridge, my "upward angled" z-chain mount design will not touch the aluminum channel at the lowest z point.