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Troubleshooting Z-axis problem  

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HavenSkye3D
(@havenskye3d)
Member
Troubleshooting Z-axis problem

I've had my Mini+ for a few months now an have been very happy with it. However, I am currently experiencing some issues that I think are on the Z-axis... first, my printer is on firmware V4.3.4 and my Prusa Slicer is on 2.5.2 (but i am constantly getting notification of some sort of update, but it will not install). Now on to the main problem, I am noticing some horizontal banding or layer shifting on the walls of some prints, not all of them. The banding appears more prevalent along the y-axis. Today I printed a Fab365 Macintosh and it was very noticeable. Immediately after (with the same filament) I printed a z-axis test tower and it printed noticeably better, but with some apparent banding toward the top. This tower is also the tallest print I have done with the Mini+. I expected this tower to show the same level of banding as the Mac, but was very surprised when it did not.

Tomorrow I will update the firmware, check the extruder, check all the axes, check the belt tension, and check any screw I can find to make sure everything is mechanically sound. I am getting good first layer adhesion but I am pretty sure the nozzle is a tiny bit closer to the bet on the left side. I will check for square and may look into the silicone bed level mod if necessary.

If anyone could help me troubleshoot this I would greatly appreciate it. I have not contacted support yet.

The sides of the Mac are supposed to be smooth.

Posted : 03/05/2023 2:43 am
HavenSkye3D
(@havenskye3d)
Member
Topic starter answered:
RE:

I updated the firmware, checked all the axes and removed some dust. Then I discovered a YouTube video that seemed to be having a similar but far worse version of my problem. I disassembled the X axis and found that the pulley gear was loose on the X axis stepper motor. Added loctite to the grub screws and reset everything as best I could. Doing some test prints now to see if it fixed the issue.

 

Posted : 03/05/2023 3:35 pm
HavenSkye3D
(@havenskye3d)
Member
Topic starter answered:
RE:

I printed out a snowman from FAB365 and the probelm seems to have gone away by about 99%. I know it's not the same model, but the problem was also visible on some round prints as well. I think it is safe to say everyone should check their X-axis pulley on a pre-built Mini. I'm sure their is more tuning to be done on my Mini, but this is looking pretty good for now!

 

 

This post was modified 10 months ago by HavenSkye3D
Posted : 04/05/2023 3:19 pm
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