Calibration problem, fitness too low

Hello everyone, I am looking for a solution regarding the calibration of the M4.1. Despite several attempts, the fitness remains too low and the process does not succeed. My frame is horizontal, I watched the calibration video several times but I cannot solve the problem. For your information, the bottom left motor seems to… “wander” when I extend the belts. Also, I only once passed the first step in the calibration but this same motor continued to turn, thus completely unwinding the belt to wind it upside down on the drum. I think I scrupulously followed the assembly videos, well I suppose… I attach a log, and thank in advance the people who will take the time to read me and perhaps help me. (sorry for my English, google translate is my friend). Gilles.

Maslow-serial (1).log (21.4 KB)

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To me this sounds like it could be a lose magnet.

If you do the process of Retract All → Extend All → Retract All (again) the machine will print out some numbers over on the right hand side.

Can you check to see what those numbers are?

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my first go around using a horizontal configuration the calibration was terrible.

You have to make sure the top left and top right belts are pulled totally tight - kind of simulating what it would look like if it were hanging vertically. Then calibration went smoother for me.

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Thank you for your feedback. I performed the procedure this morning and attached the log. I hope this information is what you requested and will be useful to you. Gilles.
Maslow-serial (2).log (4.0 KB)

Thank you for your help. I have indeed followed this procedure every time I have attempted to calibrate, as I believe it is recommended in the video showing the calibration procedure. Thank you for your help! Gilles.

So, it was a magnet problem !
Thanks for the diagnosis, @bar !
When I disassembled the four arms, I realized that two of the arms were missing ball bearings, specifically on the rollers where the magnets are attached. These rollers were therefore more or less floating…
I was sure I had double-checked the assembly, while simultaneously following the steps in the videos…
I’ll have to double-double-check next time.
And the calibration was successful the first time !

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Excellent! Great work solving it!

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