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Prusa mini, Loud Stepper Motors  

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Simeon Black
(@simeon-black)
New Member
Prusa mini, Loud Stepper Motors

My prusa mini Kit stepper motors are louder than expected, They sound fine (no grinding or Unusual sounds) But I thought they would be silent.

Is Something wrong?

Posted : 02/08/2021 4:43 pm
cwbullet
(@cwbullet)
Illustrious Member
Video

Hard to tell.  How old and did you lubricate the bearings?  

You could posts a short video so we can hear it.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 02/08/2021 4:44 pm
Simeon Black
(@simeon-black)
New Member
Topic starter answered:
Video

Only a week Old, Baring Are very Lubricated.

When I print Slow, It is quiet, But I Like to print faster.

Is It just My fault and I will just need to deal with the sound If I want to Print Fast?

Hope The Video Works.

 

Posted : 02/08/2021 4:50 pm
Simeon Black
(@simeon-black)
New Member
Topic starter answered:
Video

Posted : 02/08/2021 4:52 pm
cwbullet
(@cwbullet)
Illustrious Member
Video

I cannot view the video, but sound normally goes up with faster printing.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 02/08/2021 7:00 pm
BogdanH
(@bogdanh)
Reputable Member

Just a comment on this...
Maybe it's just my imagination, but I do believe that motors do get louder over the time. Now, after 3-4 months, motors are definitely louder than when Mini was new. Ok, maybe not louder, but they started to "sing".. you know, like an old flipper machine. I've read what causes that "sound" and came to conclusion, it's about stepper motor quality: coils can get loose over the time and start to "vibrate".
Btw. My Mini doesn't have many hours of printing and I always print at default speed.

Mini+ with Bondtech upgrade & modified firmware...
Posted : 03/08/2021 8:09 am
Simeon Black
(@simeon-black)
New Member
Topic starter answered:
Its all my fault

I assume the cause is, although I have only had the printer for a week It's been printing constantly, and on the fastest speed, I am also getting extrusion issues, but that's probity because I have The printer set to draft Quality.

Posted : 03/08/2021 1:01 pm
mrstoned
(@mrstoned)
Estimable Member
I also have these screeching noise on draft profile

Video https://photos.app.goo.gl/yzLufhVX49xXE4cC6

Printer a few month old, bearings lubed when built.
You can clearly hear the difference between inner and exterior perimiter.

0.4 nozzle
Extrusion width 0.6
0.25 Draft profile.
Only mod is bondtech extruder.

I have put thru about half spool PLA, 1.5 spool PETG, half spool ABS.

 

I still have exellent print quality and no extrusion problems i've noticed and parts are more or less dimensionally accurate.

Tevo Nereus.
Prusa Mini+ kit. BondTech extruder....
Posted : 13/08/2021 8:50 am
Lupin
(@lupin)
Estimable Member
RE: Prusa mini, Loud Stepper Motors

I watched the video. Hard to estimate how fast the printer is working, but when x and y are moving simultaneously a lot, like diagonal movement, the sound is at its worst also on my Mini. If the printer is directly on table, the sound is amplified quite a bit. To get sound down, lower the speed and/or put a noise cancellation material on concrete tile. I have about 30x30 cm and 5 cm thick concrete tile which is covered with STP's Black magic (a car noise silencing material of which I had little pieces lying around). Now the printer sound level is acceptable even when printing diagonally in draft. When it was directly on Ikea Lack -table, I thought there was something wrong with the Mini as it was so loud and I was expecting quite printer.

There's somewhere quite a lot of discussion about silencing the Mini, use the search. The concrete tile -method will come up. Even bare concrete tile will help as it is so massive that it won't resonate with Mini's sound frequencies. Best part of the concrete tile is that they are cheap and usually easily available.

This post was modified 2 months ago by Lupin
Posted : 15/08/2021 7:02 pm
mrstoned
(@mrstoned)
Estimable Member
It's stock profile-speeds for Draft

I have some space-restrictions i need to work around, but i'm sketching for a full enclosure for both printers.

Probably in 2020-alu extrutions with greenhouse plastic insulated walls. They are around 4-6mm thick.

Right now it's directly on a loose wood plank on another HDF-sheet. Only stock foam-feet's on the mini.

Tevo Nereus.
Prusa Mini+ kit. BondTech extruder....
Posted : 15/08/2021 7:12 pm
Lupin
(@lupin)
Estimable Member
RE: It's stock profile-speeds for Draft

Hard wood can resonate quite badly and thus amplify the sound. I have Ikea lack "tower", but currently without walls. PETG does not need them and the sound is now low enough (concrete tile under the printer) even when running on draft (I also use stock profiles, mostly).

Posted : 15/08/2021 7:17 pm
mrstoned
(@mrstoned)
Estimable Member
For abs and the likes

I've started printing abs to a fair bit as of lately (got 8kg premium abs for only 40 euro on a sale) as well as easy-abs and asa.

Some of my larger (about 1/3 bed fill on mini) warps, just ever so slightly in the corners so i want an enclosure. Not only for prints, but also for dust-control.

I live in a rural area with large forests and fields around. There's always some kind of dust in the air.

Tevo Nereus.
Prusa Mini+ kit. BondTech extruder....
Posted : 15/08/2021 7:54 pm
cwbullet
(@cwbullet)
Illustrious Member
tiles

 

Posted by: @lupin

Hard wood can resonate quite badly and thus amplify the sound. I have Ikea lack "tower", but currently without walls. PETG does not need them and the sound is now low enough (concrete tile under the printer) even when running on draft (I also use stock profiles, mostly).

The Lack tables are great for printers.  I have My Predator and Chiron on one each.  I have my Prusa printers in lack enclosures stack 3 high.  They work very well and are amazingly stable.  To avoid resonance, I have a 18  x 18 inches floor tile under them.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 15/08/2021 9:06 pm
cwbullet
(@cwbullet)
Illustrious Member
adhesion

 

Posted by: @mrstoned

I've started printing abs to a fair bit as of lately (got 8kg premium abs for only 40 euro on a sale) as well as easy-abs and asa.

Some of my larger (about 1/3 bed fill on mini) warps, just ever so slightly in the corners so i want an enclosure. Not only for prints, but also for dust-control.

I live in a rural area with large forests and fields around. There's always some kind of dust in the air.

Large prints in ABS, ASA, and PC Blend warp quite a bit.  The best thing you can do it keep prints small or use a brim to promote adhesion.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 15/08/2021 9:08 pm
Lupin
(@lupin)
Estimable Member
re: adhesion
Posted by: @cwbullet

Large prints in ABS, ASA, and PC Blend warp quite a bit.  The best thing you can do it keep prints small or use a brim to promote adhesion.  

Do walls help with the warping with PC Blend and ASA?

I'm interested to try out PC Blend (have a roll of "Urban Grey" waiting to be used). Now that there is the carbon mix variety, I'll likely try that one too. No rush though, I need to get the walls for Lack Tower and maybe I need to consume some of the PETG stack away first to free some storage space.

Posted : 16/08/2021 1:01 pm
cwbullet
(@cwbullet)
Illustrious Member
size matters

 

Posted by: @lupin
Posted by: @cwbullet

Large prints in ABS, ASA, and PC Blend warp quite a bit.  The best thing you can do it keep prints small or use a brim to promote adhesion.  

Do walls help with the warping with PC Blend and ASA?

I'm interested to try out PC Blend (have a roll of "Urban Grey" waiting to be used). Now that there is the carbon mix variety, I'll likely try that one too. No rush though, I need to get the walls for Lack Tower and maybe I need to consume some of the PETG stack away first to free some storage space.

Yes, to an extent.  Draft shields help also.  I have also increased my success with the perfect Z offset and a brim.  Regardless, I think always induce warping by increase the size of the print.  I think it is size-dependent.  I could be wrong but that is my experience.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 17/08/2021 10:16 am
Torc Torr
(@torc-torr)
New Member
Make your Mini+ much quieter:

If you place your Mini+ on a paver that helps massively, then use some squishy rubber sheet/bubble wrap/old bicycle innertube to isolate the paver from the desk that helps even more.

To help reduce vibrations/sounds being transmitted via air, enclose the printer, and if you want an addtional -30dB reduction double skin it. For optimal sound reduction make the cavity 100-150mm wide and make sure its as air tight as you can get it.

For ventilation, use a labyrinth design with sound absorbent rubber to baffle the sounds or fill with loose hollow fibre (old cushion).

There's nothing worse than living with unwanted noises.

Hope this helps so we all live in harmony!

 

Posted : 29/08/2021 11:15 am
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