Experiencing E-axis squeaking in only certain X,Y directions.
 
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Experiencing E-axis squeaking in only certain X,Y directions.  

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error
(@error)
Active Member
Experiencing E-axis squeaking in only certain X,Y directions.

Hello,

I'm experiencing E-axis squeaking in only certain X,Y directions. Any ideas what could cause this?

Some notes:

  • Been working fine until recently.
  • Is much less/ nonexistent with other filaments, but measured diameter of this one (3DS solutetech real grey) and it’s in tolerance as far as I can tell.
  • Prusa i3 MK3S.
  • Inside of the extruder next to the gears looks pretty clear of particles. Can’t see any wear spots.
  • Seems to print most everything fine still.
  • Can be much louder than in the video, but it’s pretty consistent when printing the test “X”.

https://www.reddit.com/r/3Dprinting/comments/fmo08s/getting_eaxis_squeaking_in_only_certain_xy/

Listen starting at 0:17. At 0:24 it suddenly stops when it changes direction.

Posted : 22/03/2020 7:59 pm
rmm200
(@rmm200)
Noble Member
RE: Experiencing E-axis squeaking in only certain X,Y directions.

Minor nitpick for clarity of communication.

Our machines have three Axis - X, Y, and Z. There is no E axis.

I suspect you mean the BondTech gear is squeaking - or the Extruder in general.

Posted : 23/03/2020 12:32 am
error
(@error)
Active Member
Topic starter answered:
RE: Experiencing E-axis squeaking in only certain X,Y directions.

@robert-rmm200

Yes you are correct, though the assembly instructions refer to it as the "E-axis assembly", and I figured that might be well known term.

At any rate, I am getting squeaking with my Extruder assembly. After more testing, it appears to happen most frequently with retractions. I did a cold pull, and it went away for a few hours of printing, but has since come back. I've found some forum posts that this is sometimes an issue with specific filament, which is probably what's going on here, but there's still several questions I have:

1) Should I be concerned of any internal damage or long lasting issues caused by this noise?

2) If it is just the filament, is there any way to mitigate the noise? It is really loud.

3) Why would the squeaking start randomly after hours of printing with this filament? I would suspect it would have to be heat creep/ some sort of partial clog, but I'd love more experienced input on this.

Thanks in advance!

Posted : 23/03/2020 6:23 pm
rmm200
(@rmm200)
Noble Member
RE: Experiencing E-axis squeaking in only certain X,Y directions.

Pick some print you don't mind interrupting, and unload the filament at a point when it is squeaking.

Look at the filament. You should see clear indentations where the BondTech gear engages.

If it looks "chewed", the nozzle back pressure is increasing so the extruder has a harder time forcing filament out.

This would most likely be due to the heat creep you mentioned. That should be visible on the unloaded filament also.

Other causes for noise could be loose grub screws in the BondTech gear.

Well bah - having typed all that, I went back and listened to your video. You obviously are not printing long enough to have heat creep in that one.

If anything, you may have bearing noise. Try putting some light oil on the X rails for a test.

If it affects the sound, slightly loosen the bearing mounts in the extruder. And lubricate your bearings.

 

Posted : 24/03/2020 7:16 am
error
(@error)
Active Member
Topic starter answered:
RE: Experiencing E-axis squeaking in only certain X,Y directions.

@robert-rmm200

Gah, wrote a response and the page deleted it 🙁

I tried the first bit you mentioned. It didn't look chewed at all, though the indentations were a bit hard to see. I'd increase my idler tension, but I'm really leaning toward this filament just being crummy (too bad it's the best color grey I've found by a mile).

Also, for that video I had been printing all day and the room had gotten quite warm (probably like 26c). Would that affect heat creep despite the duration of the print?

As for the bearings/rods, I'm 99% sure the sound is coming from inside the idler door (where it is the loudest), but just to be sure I lubricated the rods and no change in the squeaking.

Thanks for your help!

Posted : 28/03/2020 2:32 am
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