Update to the update… I found a loose stepper motor connector on my Ramps board when I went to swap the left and right Z axis connectors to troubleshooting. It seems to have fixed a few of my issues. Now when I run the Z axis up and down, they stay the same.
The one on the right is the newest one. The amplitude of the waves are a lot less. No 100% but a lot closer.
It’s increasing as it goes higher. Everything about it shouts leadscrew/treaded rod to me. Can post a picture of your printer from the front, side and top
@Michael_Scholtz I have posted them here before. I still need to replace the flex couplers with solid ones.
No obvious way that the motor connectors could cause this comes to mind. I think a more likely explanation is that while the motors were disconnected, one or both of them turned slightly so that they were in a different phase relative to one another when they became electrically coupled again and were re-energized. You were probably seeing waves from the two screws that were largely constructive before, and are now getting more destructive interference. That’d be my guess, anyway.
BTW, if I’m right, it may be possible to further reduce the waves by rotating one screw relative to the other (or you can go the other way/too far, and make it worse again).
It also means that to truly fix the problem both rods/couplers need to be replaced. You don’t have just one bad one.
I know that he swapped the lead screws woth threaded rods and it didn’t make much difference. Maybe a bent stepper shaft? But i also think the top of the screws look captive and id have them spinning free. I saw some of the older prints and it looks like there was a time this was not a problem. What changed?
I swapped the original threaded rod with lead screws. The right hand side was not keeping up and losing sync with the left. There would be several mm difference between the right and left sides after major moves. I still need to swap out the flex couplers…
Honestly, I would print a multiple tower test with those towers on each corner of the build plate or each side of the build plate
@ThantiK Great idea. At least now I do not have a difference on either side of the Zaxis… I think I will wait to try it until after I change out my flex couplers. I am also seeing some wear on the X axis belt too…
