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Knocking sounds while printing  

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Roy
 Roy
(@roy-3)
Eminent Member
Knocking sounds while printing

FullSizeRender

Hello, I recently finished building a Prusa i3 MK3S+ and so far it’s printing really well. While printing however there’s a repetitive knocking sound, like some kind of traditional chant. This happens in particular when printing the diagonal fill lines. I’m attaching a video showing this behavior. Does anyone know what causes this and how it can be fixed? 

Posted : 14/07/2021 10:16 pm
Roy
 Roy
(@roy-3)
Eminent Member
Topic starter answered:
Embeded video doesn't work but the link does

Something seems to be wrong with the attached video, but the oddly named link on the top (FullSizeRender) works 🙂

Posted : 15/07/2021 9:31 am
Diem
 Diem
(@diem)
Illustrious Member
This is annoying

The slight knock on direction change is normal. 

You can try using stealth mode.

 If that's not enough go to Printer Settings > Machine limits Where you can set acceleration and jerk limits.

Cheerio,

Posted : 15/07/2021 11:23 am
Roy
 Roy
(@roy-3)
Eminent Member
Topic starter answered:
Thanks

Thank you. The knocking is not only on direction change, it happens also on straight motion when the machine makes diagonal lines. A second noise I was wondering about is a woosh when the Y axis moves slightly faster. The X axis doesn't make such a noise and I was wondering if this has to do with the belt tension or some rotating part that might be slightly touching a stationary part.

Posted : 15/07/2021 2:30 pm
jimmy
(@jimmy-3)
Active Member
think its okay

it's normal. always wondered why my mk3s is riding a horse 😀 when printing. think it has something to do how the steppers are powered or something. i use dry bearings so, it's not your bearings  at least. 

Posted : 15/07/2021 6:07 pm
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