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Grinding Sound when Moving at 45 Degree Angles?  

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Extra Fox
(@extra-fox)
Eminent Member
Grinding Sound when Moving at 45 Degree Angles?

In the attached video I'm hoping you can hear the strange noises I hear when the printer moves at 45° angles.

As this happens, I've touched around the printer to feel where the vibrations are the strongest and it seems to be localized on the print head. Would this just mean my bearings are binding or maybe needing to be re-lubricated?

Strangely, it doesn't always make this sound. On layers being laid down at angles it's perfectly "normal" sounding.

Aaron...
Posted : 24/12/2020 9:47 pm
dimprov
(@dimprov)
Noble Member
RE: Grinding Sound when Moving at 45 Degree Angles?

I couldn't get your link to play.  Maybe try just posting the mp4 file itself (rather than inserting it as a clickable link)?

However, I have noticed a grinding sound when printing long perimeters at a 45 degree angle.  Up until I read your post, I had thought the grinding at that angle was something peculiar to my printer.  I can post the STL file if you like.  Because it's long and narrow, it can only fit on the Prusa MK3 build plate if it's orientated at close to 45 degrees.

Posted : 25/12/2020 7:25 pm
dimprov
(@dimprov)
Noble Member
RE: Grinding Sound when Moving at 45 Degree Angles?

Here's the STL file:  

This post was modified 7 months ago by dimprov
Posted : 25/12/2020 7:28 pm
Extra Fox
(@extra-fox)
Eminent Member
Topic starter answered:
RE: Grinding Sound when Moving at 45 Degree Angles?

I actually uploaded and attached the MP4 via Prusa's attachment mechanism. If you right-click on the link I believe it should allow you to download it locally. That seems to work and it plays okay.

Based on what you describe and looking at the file I'd say this could be a similar case. The grinding seems to happen at laying down the perimeters on the cross section in the file I'm attaching below. Otherwise, for all the rest--other infills, other perimeters--it makes the normal sort of noises I expect to hear. I think even on the infill on these sections it doesn't make this noise. I probably should have paid a lot closer attention. I was more focused on the mechanicals on the machine trying to ascertain the source of the noise.

Aaron...
Posted : 25/12/2020 11:12 pm
jsw
 jsw
(@jsw)
Noble Member
RE: Grinding Sound when Moving at 45 Degree Angles?

I notice a slight buzz, definitely not a grinding noise, on some angled movements, but nothing unexpected.  Movements that go in an arc can produce variable-pitch almost musical tones.  All of those I've heard are well within what I consider normal for stepper-driven equipment.

Posted : 25/12/2020 11:15 pm
Extra Fox
(@extra-fox)
Eminent Member
Topic starter answered:
RE: Grinding Sound when Moving at 45 Degree Angles?

Yeah, it's kind of a hard noise to describe. Buzz would be appropriate and that's why I took the video. It just makes a more pronounced, jarring noise in those movements. Everything else seems fine.

I've definitely noticed the musical tone on arc, I am rather fond of that particular noise.

I think I'll give the fasteners all a once-over to make sure nothing is loose causing odd vibrations. It has been a while since I paid much attention to any of that.

Aaron...
Posted : 25/12/2020 11:20 pm
dimprov
(@dimprov)
Noble Member
RE: Grinding Sound when Moving at 45 Degree Angles?
Posted by: @extra-fox

I actually uploaded and attached the MP4 via Prusa's attachment mechanism. If you right-click on the link I believe it should allow you to download it locally. That seems to work and it plays okay.

 

Thanks, that worked.  Mine sounds maybe slightly different, but close enough.  I had never heard that sound prior to printing the STL that I posted here.

Maybe someone else here wants to try it?  I'd guess that you could turn off your extruder and air print it and still get the effect if you don't want to waste any filament.

Posted : 25/12/2020 11:25 pm
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