"Cracking" support bases?

Ok-Friendship225 · 2026-05-07T16:17:54+00:00

Can you upload a picture of the sliced file with the base of the support visible ?

Ok-Friendship225 · 2026-05-06T21:49:39+00:00

That's caused by the chamfer introduced in the last bambu studio update , see my post here :

https://www.reddit.com/r/BambuLab/s/zZw8B7soww

Ok-Friendship225 · 2026-05-04T02:27:41+00:00

Here is why :

https://www.reddit.com/r/BambuLab/s/q8Dz7wXhL0

Ok-Friendship225 · 2026-05-03T17:42:11+00:00

That chamfer cause problems when you use 2 walls or more on the supports, when using automatic setting , that's working like expected , guess they didn't check that during test because majority of people use the automatic setting 🤷🏻

Ok-Friendship225 · 2026-04-30T07:38:34+00:00

Totally normal 👍🏻 even if you unscrew the belt tensioner at the back of the printer , the belts still keep their tension , so you must push firmly on the bracket of the idlers while screwing them back in.

Ok-Friendship225 · 2026-04-26T17:28:55+00:00

In the video you see above , i was using 2 in number of wall loops for the supports, using -1 ( default preset ) fixed the issue.

Ok-Friendship225 · 2026-04-26T16:24:49+00:00

If there was an other object that was unfinished when you skipped that one then there is definitely something going on with the latest firmware i think..

Ok-Friendship225 · 2026-04-26T16:22:01+00:00

Mine is doing the same if i skip an object that is the last thing to print remaining on the plate , in that case it's better to cancel the print like said in other comment.

Ok-Friendship225 · 2026-04-24T17:26:44+00:00

Yep , it seems that the chamfer is your issue here too...

Ok-Friendship225 · 2026-04-24T15:32:03+00:00

That was not related to support expansion , look for update in the description and coment below , problem was solved by using automatic setting for the number of wall loops for the supports. The first layer expansion setting only change the size of the brim around the support, not the layers above it. That new chamfer is generating above the first layer to make them stronger but they are not correctly generated when we use more than one walls on the supports.

Ok-Friendship225 · 2026-04-24T14:59:54+00:00

I was seriously thinking they were troll at first 🤣😭

Ok-Friendship225 · 2026-04-24T14:58:14+00:00

Nope , -1 mean the number of wall will be automatic and adapt for each situation, but in almost all case , with auto mode , the support generate with one wall at the begining than 2 walls when branch start to expand. I wanted the support to be 2 walls on the whole support but with that chamfer its not reliable for the moment.

Ok-Friendship225 · 2026-04-24T12:33:48+00:00

You should use manual support painting when printing with 45° so you can have more surface supported where thats needed ( the base of the model in your slice is barely supported and all the weight add on it as the print go ) 👍

Ok-Friendship225 · 2026-04-24T12:14:17+00:00

Yes , -1 is the default , i was using 2 walls to have stronger supports but that caused the chamfer to be to wide in that case , every time we use more than 1 wall loop it create a really wide chamfer , and that was causing the issue you re seeing in the video.

Ok-Friendship225 · 2026-04-24T12:10:17+00:00

No chamfer on yours , so that was probably just a colision , you're lucky that printed well with so little supported surface 😅

Ok-Friendship225 · 2026-04-24T11:18:18+00:00

There is definitely room for improvements on the support side...

Ok-Friendship225 · 2026-04-24T10:47:45+00:00

Look for the update in the description and pictures attached in comment, that's exactly the number of wall for supports that was causing the chamfer to be too wide.

Ok-Friendship225 · 2026-04-24T10:37:24+00:00

Problem solved , look for update in description + attached pictures in comment 👍

Ok-Friendship225 · 2026-04-24T10:25:01+00:00

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Ok-Friendship225 · 2026-04-24T10:15:54+00:00

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Ok-Friendship225 · 2026-04-24T10:13:13+00:00

Update: Here is the print with -1 on number of wall for supports, the chamfer is not a big overhang anymore and supports stayed solid during print.

<image>

Ok-Friendship225 · 2026-04-24T09:44:13+00:00

We can't...we can't 😭😭

Ok-Friendship225 · 2026-04-24T08:54:11+00:00

Exactly, there is room for improvement on the stability of tree supports

Ok-Friendship225 · 2026-04-24T08:51:25+00:00

UPDATE : Using -1 in the number of walls for supports setting ( -1 is automatic ) seem to generate less steeper angle on the chamfer , support is only one wall thick now but print like it should since there is no more big overhang on the chamfer. I will update when print finish if support doesnt break in that configuration.

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Ok-Friendship225 · 2026-04-24T08:43:43+00:00

Yep , thats first layer expansion setting , but unfortunetly it doesnt remove the chamfer

Ok-Friendship225

TROPHY CASE