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ericwilsonart

UM2 making a screeching noise on Y axis

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I just unboxed this and as far as I can tell this noise that is being produced as the head travels on the Y axis (at least Y as it correlates to Cura) seems unnatural and I am worried it is effecting the print negatively. What noise am I talking about? The one that sounds like scratching your nails on a blackboard or screeching metal on glass. That's the one! :) I can't seem to get any good results as of yet. I have mirrored the settings using the same PLA printing the same model as others have with far less impressive results. Any thoughts from the community would be appreciated greatly! Oh I did oil the rails with sewing oil and that has not helped.

Thanks,

Eric

Hi I posted a video of it here so you can hear it yourself. https://www.youtube.com/watch?v=fDrl-eQmqbM&feature=youtu.be

 

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It sounds annoying as hell.

With power off, or with power on but with servo power off (they are off most of the time when not printing) push the head around. Try to duplicate the noise and see where it's coming from. Belts? Rods? Pulley slipping and grinding a rod? Motor? Motor pulley?

Try also pushing it around by pushing on the side blocks or just one block and try pushing by moving the long belts or short belt directly.

Are you near the huntington beach in CA? It's important to know what country you are in as customer support is usually faster in USA (at this time, UM CS is hiring).

 

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I had the same issue with mine a week after I received it.

It got to the point I was unable to print. I then decided to inspect the stepper motors. There was dirt/debris in-between the outer housing and the stepper motor. I removed the motor and cleaned the area. When I did this, I also happened to notice some issues with the stepper motor with debris effecting it also. I cleaned everything I could. Reattached everything and sound was gone! It also drastically improved print quality, and I have yet to have any issues in the last 6 months.

Looking at the housing image below, you can see there is very little room between the rotation and the cover. If there is dirt in there at all it causes vibration in the housing :( It would be nice to ventilate or have a cleaning hole with protection cover.

photo1.JPGphoto2.JPG

 

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I got my UM2 last night. After a couple hours printing it started making a noise just like this. That motor pulley was too far out and scratching the plastic just like that photo. The pulley set screw was too loose, and only took a small force to remove. I slid the pulley in most of the way and resolved the issue.

 

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