Some people are expressing issues with the Motor Driver chips overheating... is it possible to cool your einsy board? or maybe put heatsinks on the stepper driver chips? I saw someone tuck a small fan inside the einsy case, over the stepper driver chip area... (Can't remember who)
regards Joan
I like this case from Zaribo.The fan can be placed anywhere, e.g. on the driver heatsink. There is a variant with or without the installation of a Raspberry:
https://www.thingiverse.com/thing:3239428
@joantabb
Lots of people are telling me that temperatures might be a problem on the board or the motors themselves.
I personally don‘t think this is the problem since the temperature inside my enclosure is never above 30 degrees. It won‘t hurt to try however so I‘ll add a fan after the next test tomorrow. I‘ve put so many hours in so far that this won‘t make a difference anymore. The case you linked seems nice @karl-herbert. I might print that. Thanks!
Are you seeing one or more layer shifts? In my case it is almost always just one (with a rare second one, which as @baklin has pointed out could be a crash detection shifting things back). Which makes it hard for me to understand why a voltage issue (or even a belt issue etc) could cause it as I would expect to see shifts more frequently.
@fuchsr
It‘s the same for me. I rarely have more than one shift in a print. Right now I‘m printing for 18 hours without any layer shift once again. The error might happen in a few hours though with this print...
Well, bite my shiny 3D-printed case... without crash detection the print worked!
Now I need to debug on that! It seems to me that the crash detection is much too sensitive because it was triggering sometimes without anything obviously wrong. In a print like this I would have like 5-10 crashs over 32 hours print time.
Hi Newk, ~
have you looked at lubing the linear rails?
checked whether the back panel on the X axis is too tight?
checked whether the Y axis Ubolts are too tight?
could the X and Y Idler mounting bolts too tight causing friction on the idler rollers?
regards Joan
@joantabb
X and Y Idler mounting bolts? I did a quick Google search. Which bolts and steps are those?
the X and Y belts have a motor at one end of travel, and an idler pulley at t he other end, it is possible to over tighten the bolts that retain the idler pulleys and cause friction between the aluminium rollers and the plastic side cheeks
regards Joan
@newk
one thing I did not see mentioned... and humor me on this one, but did you try and disconnect octoprint fully and let it just run directly from the printer without octoprint connected? I would give it a shot for X amount of time, then if it is not doing it, you might have found the problem, at that point you could try a fresh install on your octoprint then.
As far as the heat issue, not sure.... but could be that people missed that he has a vent on top that he can control the temps a bit. And for the 35-45c... that was what prusa would run their print farms at so there was little issues with the electronics having issues... For some, its when they hit 70c (no I dont know why they would want it that high) in the chamber, then you can have issues with the electronics and motors.
Heyho,
check the linear bearings of the X-axis (or maybe it's better to replace them directly).
Here is a short explanation why:
In the beginning, when I just got my printer, I could not detect any "strange" noises when the axes moved around. However, this changed a few weeks later, and I could hear a soft cracking sound several times per print (depending on the size of the print). A friend then gave me the idea during a conversation that the linear bearings jam sporadically. Most of the time the resistance is so low that the motor simply runs over it. But sometimes the bearing jams a bit more and the motor needs a few steps to overcome the resistance, which causes the misalignment.
So try to sit next to your printer and listen carefully if you hear a slight cracking sound sometimes. If so, I would invest the few bucks and replace the bearings and see what happens.
Hope this helps you out,
Greets,
Haum