Issues with Test Print Tollerance

3D Printing!
1

Hello everyone. I’m new here and happy to be part of the community.

I just completed my first PETG test print and overall it came out great, except for the holes where the dowels sit inside the base.

The dowels are extremely loose, which causes the cube to fail.

Printer / Settings:
Bambu A1 (several machines) with a 0.4 nozzle
0.20 layer height

Filament:
Overture Matte PETG – Purple (dried)

I searched the forum but didn’t see much information about troubleshooting print tolerances.

As a caveat, I’m not new to 3D printing in general, but I am newer to dialing in tighter tolerances.

Any advice would be appreciated.

Here is a video of what I am seeing:
PETG .2 Test Fail

PETG_test1
PETG_test1576×1024 88.9 KB

1 Like
2

Are you using a known good filament profile for this? I haven’t used overture in a LONG time.

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3

Just went to their site and loaded the config to try another print :slight_smile:

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4

The fit is supposed to be loose. It looks like you need to add cooling for short layer times and/or increase the minimum layer time (the new profile should be a good starting point)

2 Likes
5

I too found this very much impossible. The pillar is printed fine, but once it hit the cube, the pillar would get loose and then the cube would get malformed due to the vibrations and shaking back and forth. I’m not sure exactly what this is trying to test, other than adhesion to the bed.

6

In regards to matte PETG, I can’t speak for Overture, but I found matte PETG from Jayo to be much weaker than standard PETG.

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7

thats what was happening to me but it was a bed adhesion issue. the pegs came loose which caused the top to fail

8

If you are printing on a bambu machine with the cool plate that might be part of your issue. I had nothing but problems getting PETG to stick to those. Went back to the PEI plate and its been great!

1 Like