VC3.1 500 upgrade. Rear bed z drops when unpowered.
I just upgraded my machine from 3.0 to 3.1 and after the upgrade the rear Z won't seem to hold the bed in place when unpowered.
I'm assuming this has something to do with the new bi-material coupler but I have yet to find a way to 'tension' the connection so that it doesn't drop 40mm.
Any thoughts/solutions for this issue?
6 Replies
Didtou ever get a fix for this my vcore 4 has just randomly suddenly decided to do this
Just guessing: Could the motor coupler be loose? Seems like quite a lot of force would be needed to turn the motor. But if the coupler was loose, I’d think you’d see other issues as well.
Coupler is good, tight on both the rod and the motor. I'm convinced the plate is too heavy for the one motor, especially if the rod is greased. I'll be attempting to degrease the rod and swapping out the motor for a high torque NEMA 17. If that doesn't work I may look to converting this to a 4-z system as I've been working with RatRig CS to no avail.
Sounds like a plan. Yet another option might be to with a higher viscosity grease, if the other changes do not help? Still just guessing 🙂
SOLUTION: So it seems like the issue was i was running TR8x2 4 start lead screws. Apparently having 4 threads as opposed to two or one wont hold up the heavy plate of a vCore 3 500. Switched to TR8x2 single start lead screws and that resolved the issue. Back z no longer drops at all when device times out or is shut down.
Good to know, and certainly an understandable explanation👍