They hold but not of smooth as I would like. maybe then need a break in.
I added some grease but that seemed to make no difference.
I have used US made stuff that was smooth as silk. I don’t know if it is the bearings or the ground rods. I used the case hardened rod that says it is for linear. but maybe the chrome plated stuff is smoother. they do seem to work better if there is a lot of load on them. I get a bit of ripple in the spiral demo(going as fast I could get EMC to go). And the rods still flex a bit too. I wanted to fasten them in the center. but even after grinding a big notch I could not drill the stuff, maybe spot welding a screw might work. The rod with pre-drilled holes seems to cost a whole lot more.
but I think just one in the center would make a world of difference.
Wow. This looks awesome. Have some of Sly’s revisions been added to the most recent documents? I converted all of the CNC DXF documents to older AI files to give to my CNC guy to cut mine out of PVC. I think I may just build the standard build and then use it to upgrade itself slowly using some of Sly’s ideas.
Let me know if you get documentation on building your machine. Looks great!!