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Y-Axis fake(?) Crash detections - let's debug  

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dhague
(@dhague)
New Member
RE: Y-Axis fake(?) Crash detections - let's debug

I had exactly the same symptoms as Gordon - reproducible crashes printing a simple circular model between 10mm & 15mm Z. Rebuilt Y-axis & greased the bearings, a small improvement in belt-text numbers but no change in Y-axis crashes. Prints were fine except for occasional zits from the nozzle moving to home & back during a crash. I printed a belt tension meter and its measurements showed the belt tensions to be fine. On the advice of Prusa support I swapped the X & Y motors and the problem went away. In my case I have simply made the swap permanent and so far, so good. Prusa have said that if I now get phantom X-axis crashes then they will send me a new stepper. I guess this is down to small differences in steppers & drivers such that sometimes a stepper/driver pairing is out of spec, but switching motors solves the issue.

Veröffentlicht : 08/08/2021 3:47 pm
fumo
 fumo
(@fumo)
New Member
RE: Y-Axis fake(?) Crash detections - let's debug

Hi, I had the same issues like the other guys. Some y-crashes seemingly without any reason...until my wife found that from time to time the y-bearings slightly touch the zipties that attach the ribbon cable (display) to the extrusions.

I sketched and printed 2 suitable clips and everything is fine now. I will publish the clips later today on printables.com

Veröffentlicht : 28/06/2022 12:40 pm
IPIND 3D
(@ipind-3d)
Estimable Member
RE: Y-Axis fake(?) Crash detections - let's debug

The link in my last post is broken and I can't edit it.

Here is the working one:

Veröffentlicht : 19/03/2023 10:21 pm
IPIND 3D
(@ipind-3d)
Estimable Member
RE: Y-Axis fake(?) Crash detections - let's debug
Veröffentlicht : 20/03/2023 8:34 pm
IPIND 3D
(@ipind-3d)
Estimable Member
RE:

I'm truly finding this forum frustrating at the moment. Two detailed responses have now been lost with just blank posts appearing following moderation approval.  🤬 

I'll post this and if it appears, I'll edit it before the timeout - that edit timeout thing is a longstanding gripe that needs to get addressed too.

Ben.

Veröffentlicht : 21/03/2023 10:00 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Y-Axis fake(?) Crash detections - let's debug

Hi Ben, 

This post still had content, when I came to approve it,

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

Veröffentlicht : 21/03/2023 10:53 pm
IPIND 3D
(@ipind-3d)
Estimable Member
RE: Y-Axis fake(?) Crash detections - let's debug

This is a much shorter version of my previous attempts to provide detailed results on my testing, which have been lost due to issues with the forum.

I've moved my printer into a custom built enclosure.

All electronics, including the Einsy board, are now house in a separate, fan force cooled section.

Heatsinks have been installed on the stepper motor drivers.

The factory electronics box is too cramped with the excess wiring and has no room for heatsinks. Even if you could get it all in there, there would be insufficient airflow to allow any viable cooling to take place. That and the box is right next to the heat bed.

The ambient air temp in my print room regularly exceeds 35C.

Since doing the above, my false Y axis crashes have stopped.

IMHO opinion, the issues is directly related to heat. Whether this is specifically the effect of heat on the drivers, the CPU or a combination of both, I'm unsure.

Ben.

 

Veröffentlicht : 21/03/2023 11:04 pm
IPIND 3D
(@ipind-3d)
Estimable Member
RE: Y-Axis fake(?) Crash detections - let's debug

After a week of testing, I can confirm that moving the electronics into a large and separate fan forced bay and installing heat sinks on the stepper drivers has not resolved the issue. 🙁   This basically rules out the heat theory for me.

I think I'll get a replacement Y axis motor as other have had success with swapping the Y axis motor out.

Veröffentlicht : 28/03/2023 9:39 pm
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