Really, this is a few questions I’m looking for advice on.
When I fully power off my LR4 any sort of downward pressure on Z (even a light touch) causes Z to crash, as the stepper motors are no longer maintaining a position. If the X is near either extreme, it crashes on it’s own. Does anyone have a solution for this, maybe some stops to secure Z I could print or something (I looked and found LR3 stops)? Or some other simpler solution I’m not thinking of?
For those who use a folding table do you leave the gantry attached while folding? How do you deal with Z crash as described above, or other axis motion you don’t intend when folded?
If you frequently remove your LR4 gantry from your table…any tips?
I use a couple of parking blocks for my LR4. Nothing fancy, just a couple of printed pieces that keep the machine off the spoilboard, and I yank them out when Z homes.
No folding in my shop.
I removed it once to try it. Only that once. I might do it again if I need to put the table in a different spot on the floor. Maybe.
Mine is even simpler. I put 2 small 2x4s under each end of the gantry before I power down. Sometimes I just remove the bit and let it drop to the bottom.
Yes, the LR3 had printable blocks that could fit on the lead screw threads. Unfortunately the LR4 design doesn’t allow for that, so a wooden block at each end of the gantry is your best bet.
I have a (heavily modified) LR3, and a tiltable table, and I leave the gantry attached. I use a couple of small pieces of wood clamped to the edge of the table to keep the gantry from sliding off, and a bungee cord on the other end to keep the gantry from tipping. This may not work if your table tilts past about 75 degrees.
Watch that the endstop switch arms don’t get snagged on clothing, belt, miscellaneous object, etc. They can pop off and get lost really easily. It helps if you sweep and vacuum the floor before you move it, so that you can find the little arms on the floor when they fall off.
