I got tired of trying to get the x-gantry arm level, so designed/printed a gantry arm leveling jack. I used a 5/8” all thread, nuts and washers, plus some “Rare-earth” magnets to hold it to the outside lower rail under the gantry arm, and put some mags on the upper block as well, but did not actually need them.
For me this made leveling that arm MUCH easier. I loosened all the arm roller carriage bolts and bearing tension bolts, then measured the “Close” side, and used the jack to creep up on it being the same measure on the far side.
Tightened up the arm/carriage pivot screws the two at the top on forward & backward side. removed the jack and then measured the drop at the X+ max side, I then raised it by that much drop, re-loosened then retightened it all back up. And, POOF!!! it was dead level!
TY! Yea, understood on the machine jack, kind of borrowed the idea-ish, from a part leveling jack on a mill, but without the wedge part. Didn’t need that kind of accuracy. Just wanted a way to sneak up on where I wanted it to be then lock it down.
A sissor jack would have worked like you said, but I did not have one on hand. The one for my truck is too tall even all the way collapsed. Great idea on the thought though.
Had more trouble checking the right-angle squareness of the X/Y axis. I ended up holding a large roofing square over the top of the two rails and “Eye-balling” they where at right angles. (they where, and was very glad I did not have to try and square that contraption up….)
