Hi! We’re getting a really weird issue on a part that I need a lot of. It’s a rough texture that I keep getting right after the seam, regardless of where the seam is placed. Here’s what we’ve found so far:
- It only happens on parts that have rounded edges where the sides slope upward.
- The effect appears to cascade with each layer.
- It’s not just the outer wall that does this - we stopped a print halfway through and discovered that this issue is found in the inner walls as well.
- It’s not a speed or acceleration issue - this occurs even when we print 10x slower than default
- Adjusting layer height has no effect
- This issue happens with any quantity - not just when we’re printing a lot of the part all at once.
- We doubt it’s an issue with the printer itself since we have five and the problem happens on all of them.
Other details:
- Slicer: Bambu Studio
- Settings: 0.28mm default
- Filament: Bambu ABS
- Printer: P1S
- AMS: Yes
Photos:
Problem from the side:
Less severe version of the issue:
Cross section (note that this is a different part than the last two photos - it’s happening with everything):
I cannot share the .3mf as these files are proprietary.
Any help on this issue would be much appreciated!
That’s a lot of walls. Have you tried dialing them it back a bit to see if that changes anything?
How are you drying your filament?
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We’re using lots of walls since these parts will be under a lot of stress, but we can test using fewer just to narrow things down.
We’re keeping our filament dry in the AMS. Checked the dessicant and it seems to be doing okay.
The AMS doesn’t dry filament. It is not safe to assume that filament comes “dry”. The AMS at best tries to keep filament from absorbing more moisture.
Noted. I still don’t think wet filament is the issue, since these parts were turning out fine just a week ago.
Are you using the same gcode file to print the problem version that was used on the good version or have you resliced?
How often do you clean the rods and retention the belts?
I’ve found that printing with ABS I need to clean the x rods when ripples start to show up.
We’re using a different gcode file from what we used for the ones that came out well, so that could very well be it. That would explain why it’s happening across all our printers instead of just one.
I follow the recommended maintenance plan, and on top of that, one of our printers is fresh out of the box. So it could very well be a slicer issue.
We’re running a couple batches of parts that are unaffected by this issue so I haven’t had the chance to troubleshoot anything today.
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