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Since updating to 3.7.2 XY axes no longer functions  

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Chris W
(@chris-w-4)
Active Member
Since updating to 3.7.2 XY axes no longer functions

Since updating to the 3.7.2 firmware off of the 3.7.2 RC firmware, I am having issues with XY axes movements when in the top right quadrant of the print space. I was getting layer shifts and other anomalies in recent days that have not existed.

Here is a video of the XYZ failing and showing a self-test succeeding. It seems like the right rear calibration point is no longer being detected by the PINDA but the first two points are. This seems to be causing a skew and the printer to exceed the print boundaries for that segment of the bed until it errors

https://photos.app.goo.gl/6JDi75HKfJyHczu76&source=gmail&ust=1563067563138000&usg=AFQjCNHbC13o3qWqoBqwPBkv92LxJBsbs w"> https://photos.app.goo.gl/6JDi75HKfJyHczu76

Note: at times I shift the paper to verify clearance that the z height isn't going under minimum tolerance.

Printer was originally a fully assembled Mk2S, to 2.5, to 2.5S.

 
I tried to downgrade back to 3.7.1 and it still doesn't catch the right rear calibration point.
 
This was my prior bed level plot captured using octoprint. This layout and the quadrant being a bit higher then the other sections has been like that since it was a MK2S out of the box.
 
newplot.png
 
I tried both the 7x7 mesh leveling setting and firmware 3.7.0. All have resulted in the same failure for the back right quadrant not being detected by the PINDA for calibration correctly as shown in the video. Is there anything else that can be done to try and fix it so the printer can detect the calibration point again?
 
It looks like as the back point is probed during ZYX calibration it moves over the point and cant find it as the probe is moved in larger circles trying to find it.
 
Any help would be appreciated and I would love to know why that segment of the build plate has been giving me such hard troubles with calibration since day 1 of the Mk2S. Just now I cant adjust the probe height for it to work anymore.
Postato : 13/07/2019 1:30 am
Chris W
(@chris-w-4)
Active Member
Topic starter answered:
RE: Since updating to 3.7.2 XY axes no longer functions

I played around with it a bit more and did another calibration and leveling… its almost like the printer things the bed is larger then it actually is. Is there something that would cause the firmware to lose its sizing. Either something that could be causing it to miscount steps from the motor, lose the bed size, or amplify X and Y translations from the 0,0 reference so that the further it gets from that point the more error it gets. Would also explain why there is a layer shift I noticed in the days before I sent my report in to prusa support. each time it does a new z-height layer it was a little more off since it couldn't re-home against the probe point used by auto home (since it was mid print).

Postato : 13/07/2019 1:59 am
Chris W
(@chris-w-4)
Active Member
Topic starter answered:
RE: Since updating to 3.7.2 XY axes no longer functions

Does anyone know the gcode to modify the multiplier used by the firmware to for Y axis translations. I want to try and decrease the y-axis moves by .5% or 1% to see if that resolves this issue. I have been talking to support and they stopped responding to me after a month of trying to troubleshoot this issue and am getting desperate to get working again. I am 99% sure now the issue was created by running a gcode provided that increased the Y-axis multiplier from the default and that is why everything overshoots on that axis past the printable area.

Postato : 08/08/2019 11:18 pm
Dave Avery
(@dave-avery)
Honorable Member
RE: Since updating to 3.7.2 XY axes no longer functions

do a factory reset with data clear and then rerun the calibration wizard 

Postato : 09/08/2019 11:25 am
Chris W
(@chris-w-4)
Active Member
Topic starter answered:
RE: Since updating to 3.7.2 XY axes no longer functions

Thanks for the idea. I tried that again and it didn't resolve the issue. I just cant figure this out and I am afraid I may have to send it back to Prusa to figure this out. The pinda seems to work but it keeps exaggerating Y axis moves so things cant find the calibration marks. The Y axis is originally assembled in the factory, so I don't think it is an assembly issue and the belts are all fine. It just keeps overshooting.

Postato : 09/08/2019 9:13 pm
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