Failed x axis self-test
Hi all,
Apologies if this topic has been discussed numerous times but I'm kind of stuck here.
I built a MK3S bear with some official parts and some generic ones. When doing the self-test I have a failure for x-axis length I cannot solve. I tried the following so far:
- check belt tensioning & pulley alignment
- check cable management (I think I now know the assembly guide by heart!); movement is free on both sides of the rod
- grease the rod
What's disturbing is that I feel that there is more resistance (and noise) on the middle of the shaft - I may change the linear bearings to see if they are guilty but any other idea I might try?
Thanks!
RE: Failed x axis self-test
Have you seen these:
https://github.com/gregsaun/prusa_i3_bear_upgrade/issues/108
https://guides.bear-lab.com/Guide/5.+Final+adjustments+and+calibration/14
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Chuck H
3D Printer Review Blog
RE: Failed x axis self-test
That's what happens when you do not read instruction till the end *facepalm*
I did not see the step with a bear specific FW, will definitely try that. Thanks!
RE: Failed x axis self-test
No issues. This happened to me too.
That's what happens when you do not read instruction till the end *facepalm*
I did not see the step with a bear specific FW, will definitely try that. Thanks!
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Chuck H
3D Printer Review Blog
RE: Failed x axis self-test
So I tried with the bear firmware and it is not working 🙁 I also changed a bearing that seemed to be a bit broken.
What I don't understand is that the belt status is at 235 (so normally within range), and if I loosen it to approx. 260 then there is no tension at all. I'm starting to doubt about that measurement.
If anyone has other ideas I'm welcoming these!
RE: Failed x axis self-test
Found it! And I need to post it in case other people as foolish as I am to build a MK3S from scratch have the same struggle.
The reason comes from the fact that I was using a 20 teeth GT2 pulley instead of a 16 teeth. That obviously changes everything!
RE: Failed x axis self-test
That would be enough to break it! 🙂 lol...
are you using 16 tooth on Y axis?
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE:
That was the issue indeed, I was using a 20 teeth pulley 😞
For now I just took the 16 teeth one fr the Y axis, so I'll need to buy another one to complete
RE: Failed x axis self-test
That is also a problem.
Found it! And I need to post it in case other people as foolish as I am to build a MK3S from scratch have the same struggle.
The reason comes from the fact that I was using a 20 teeth GT2 pulley instead of a 16 teeth. That obviously changes everything!
--------------------
Chuck H
3D Printer Review Blog