I was working on drilling some holes when I heard a clunk, and saw a plastic piece with a spring above it on my z-axis. I took a quick video, shut the machine down, and started to disassemble the Z-Axis plate.
Behind it, I found the what is shown in the picture. The top piece is what screws to the plate, and seems to move the Z-axis up and down. THe bottom plastic piece has holes, but no mounting ability, and the spring just drops to the bottom of the screw drive. Any idea how to fix this? In the middle of my CHristmas rush and my machine is down hard right now.
You should send an email to their Support (
firstname.lastname@example.org) too, if you haven’t already.
The bottom part is the floating but to reduce blacklash, but it separated enough that it’s not going to be doing that.
If you’re in a rush, you can leave it there and reattach the spindle to the nut with inserts. If you don’t have excessive vertical play, then I think you’re good to go.
It’s the floating part of the anti-backlash nut. It just threads onto the rod, BUT you want the other portion close enough that the spring in-between them has a bit of compression.
I disassembled the Z-Plus to clean the linear bearings and I have doubt about the orientation of the lead screw bracket.
Picture A is how it was installed and picture B looks like how it should have been installed.
Are these blind nuts pushed in from one side? If so, shouldn’t the bolt attach through the picture B side?
If it’s come off, either your Z came down too far (and unthreaded it off the bottom), or the threads on the nut have stripped. If they’ve stripped, you can get a new one by writing to Support.
If the top nut feels snug on the threads of the rod, then it’s fine to run the machine without the other portion.
More details on the anti-backlash nut and installation:
I was having issues with excessive depth of cut that I finally tracked down to a worn leadscrew main nut/anti-backlash nut assembly, documented here:
Z-Plus play/backlash question
Support was kind enough to expedite repair parts, it took about 20 mins to replace and was easy enough to do. Here are the steps for anyone else with the same problem.
This is the assembly that needs replacement. Note that the nuts are plastic (feels like nylon or similar). The main nut is held on with the 2 screws a…