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Uneven/wavy walls. Caused by belts on idlers?  

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GuyH
 GuyH
(@guyh)
Reputable Member
Uneven/wavy walls. Caused by belts on idlers?

I printed a large part and placed it diagonally on the bed as it would only fit corner to corner. Ended up with wavy walls from what I think is the belts based on the pattern. Anyone else experienced this? 

Publié : 08/01/2024 7:42 am
blauzahn
(@blauzahn)
Reputable Member
RE: Uneven/wavy walls. Caused by belts on idlers?

Yes, on the MK3S+ in x- or y one can observe the same pattern. That is exactly the tooth pitch of both gt2 belts. At a core-xy it is at  an angle of 45 degrees instead.

Publié : 08/01/2024 9:49 pm
GuyH a aimé
MME
 MME
(@mme)
Reputable Member
RE: Uneven/wavy walls. Caused by belts on idlers?

Lately I have discovered something that might help. I was printing with perimeters first. I was testing without printing perimeters first. Printing without perimeters first seem to give me a better outer finish and even better no skipped extruding spots on prints. I am on my 3rd 8 hour + print printing without perimeters first. This was how I printed my enclosure and they were all perfect prints.

Publié : 10/01/2024 3:53 pm
GuyH et Nikhil S. ont aimé
GuyH
 GuyH
(@guyh)
Reputable Member
Topic starter answered:
RE: Uneven/wavy walls. Caused by belts on idlers?

So are you printing infill, inner then outer? 

Publié : 11/01/2024 10:49 pm
MME
 MME
(@mme)
Reputable Member
RE:

This is from the online guide. I am doing the inverse. I haven't seen any dimensional issues. I printed my entire enclosure this way. I believe this was the default when I received my printer. Inside perimeter first also pretty much eliminated the seams on the outside. you might also want to add a extra perimeter thickness for larger prints.

"External perimeters first

Perimeters will be printed from the outermost to the innermost ones instead of in the inverse order.

This parameter may help with dimensional accuracy since the outer perimeter is laid down first and any extra filament extruded when printing following perimeters is pressed back away from the outer wall. On the other hand, the surface may be slightly less smooth."

Posted by: @guyh

So are you printing infill, inner then outer? 

 

Publié : 12/01/2024 1:54 pm
GuyH
 GuyH
(@guyh)
Reputable Member
Topic starter answered:
RE: Uneven/wavy walls. Caused by belts on idlers?

Looking at the belt paths all the smooth idlers have the belt smooth side to them except these, where the teeth are against the smooth face. I believe this is the cause of the ripples I see. It’s the same as the Bambu X1C printers. Why can’t this be a toothed idler? 

 

Publié : 16/01/2024 9:03 pm
blauzahn
(@blauzahn)
Reputable Member
RE: Uneven/wavy walls. Caused by belts on idlers?

Good question. Since it it the same on the MK3S which has been out in the wild for years, perhaps you can find in that forum area posts telling the experience from users who have changed their idlers (x or/and y) into toothed ones. I have not looked for this topic so far.

Publié : 16/01/2024 11:11 pm
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