I’m new to Bambu and don’t know what to expect in terms of dimensional accuracy. After printing several square/rectangular parts, I calculated my shrinkage value to be 99.4% for Polymaker ABS, red color. The ABS was dried before testing and has been sitting in the AMS2 at 7% humidity.
The round section of my part is consistently too small but the square portion is dimensionally correct. How do I make the round section bigger without affecting the square section?
I’ve tried:
- Changing the shrink factor (makes the square too big)
- Auto circle contour hole compensation (not much difference)
- X-Y contour compensation (makes the square too big)
- Slower print speed (made problem worse)
- Bigger in CAD model (best solution but harder to manage)
I see other folks mentioning the same thing at:
https://www.reddit.com/r/BambuLab/comments/19clhfh/dimensional_accuracy_off_in_circles_not_squares/
https://github.com/bambulab/BambuStudio/issues/3972
https://www.reddit.com/r/BambuLab/comments/15kw4oc/bambulab_p1p_dimensional_accuracy_issue/