I have had a bambu labs P1S for about a year now.
Recently about 4-5 months ago at the time of this posting I have been having issues with my P1S. I have been having issues when I print anything that a 90°/right angle corner I get this rounded bulge on it. This only starts after the first few layers.I have checked belt tensions, x, y, z axis belts, calibrations, print calibrations, etc…
I am not sure how to resolve this, any assistance would be helpful.
Please do a flow dynamics calibration on the filament and try again
Hello OE3D I did a dynamics flow and it did not correct the issue. Do you have any other suggestions that may assist?
Some suggestions here on this post by @3dsurfr
What I haven’t seen mentioned in this thread is whether you’ve tried recalibrating the filament. It’s easy to assume the hardware needs maintenance, but more often than not, the filament is the simpler thing to adjust. Also, if you’re not experienced with hardware maintenance or lack the proper tools, you can sometimes make things worse. That’s why I suggest starting with the easy fixes before jumping to hardware adjustments.
The issues you’re experiencing could be hardware-related, but even in those cases, they can often be addressed through slicer settings and calibration.
I hope this doesn’t come across as a lecture, but before you proceed with these steps, please do yourself (and all of us) a favor: dry your filament properly. Don’t just say, “I dried it for X hours.” Weigh it before drying, then dry it, and weigh it again to confirm if there’s moisture present. Bambu claims PLA doesn’t need drying, and usually it doesn’t, but we’ve seen too many instances posted by members here where even PLA has been affected by humidity when left out in the open.
I also tried to recreate what’s likely happening with your model. It seems like your pressure advance needs tuning. Here are examples of the effects of different pressure advance settings.
Here’s a another view.
Try changing your pressure advance but don’t presume that 0.020 is correct for your setup. Or better yet, use the pressure advance PA Pattern test in Orca slicer to best calibrate your filament and then test it on a section of your model using the cut tool and refine it further from there if you seek perfection.
This is what a PA Test calibration pattern will yield and what you want to look for.
The way you use this test is to note which corners and edges yield the largest gap-free results. Often you’ll find that it isn’t one set of lines but more like a “vote” between competing results. In that case, you just pick a value between the two PA numbers. In this example, conveniently 0.010 seems to be the best. Also, use your camera to take a picture and zoom in, it will be easier to spot results.
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Thank you for this, I apologize for the delayed response I had something come up. I am currently doing this and trying to dial in my pressure advancing. I am doing test prints on that V style pattern and then on blocks to get an idea.
I will report back when I have figured it out
