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Z Axis Motor "hissing" while idle  

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Ckobar
(@ckobar)
Estimable Member
Z Axis Motor "hissing" while idle

Hi everybody.

 

I finished my conversion build this weekend and the printer is running fine.  (quite noisy, but thats discussed elsewere)

 

I was wondering what fan is spinning, when the printer is in idle.  I put my head in the printer and i could locate the sound to the one Z-Axis motor (the new one)

After disabeling all motors in the settings the noise was gone.   Moving z via the menue, and the sound was there again. When dialing step by step, every 3rd or 4rth step the noise also disappeared.

The sound is like a laptop-fan, not loud but noticable if its quite around.

Do you notice the same ?

Posted : 07/07/2025 6:12 am
yblaser
(@yblaser)
Eminent Member
RE: Z Axis Motor "hissing" while idle

Yes I've noticed the same thing on my preassembled C1.  Didn't count the steps but did also observe the sound occurring only at specific z positions.

Posted : 07/07/2025 6:06 pm
GW Marshall
(@gw-marshall)
Active Member
RE: Z Axis Motor "hissing" while idle

In End G-code I changed M84 X Y E to M84 X Y Z E to and it did nothing.

I tried M84 and it did nothing.

Going to Control->Disable motors stopped the noise.  

How does one report a firmware bug?

 

 

Posted : 07/07/2025 10:10 pm
yblaser
(@yblaser)
Eminent Member
RE: Z Axis Motor "hissing" while idle
Posted by: @gw-marshall

In End G-code I changed M84 X Y E to M84 X Y Z E to and it did nothing.

I tried M84 and it did nothing.

Going to Control->Disable motors stopped the noise.  

How does one report a firmware bug?

 

 

Here:  https://github.com/prusa3d/Prusa-Firmware-Buddy/issues

Posted : 07/07/2025 10:43 pm
GW Marshall
(@gw-marshall)
Active Member
RE: Z Axis Motor "hissing" while idle

Submitted

 

Posted : 07/07/2025 11:18 pm
1 people liked
Ckobar
(@ckobar)
Estimable Member
Topic starter answered:
RE: Z Axis Motor "hissing" while idle

I just saw, M18 should do the same. maybe this works . (have to try tonight)

Posted : 08/07/2025 7:36 am
GW Marshall
(@gw-marshall)
Active Member
RE: Z Axis Motor "hissing" while idle

Tried m18.  Does not disable z-axis steppers.

Posted : 08/07/2025 10:48 am
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