I hope I can find some information about my problem here. It’s about my print. I always have these rough spots at a certain height, as you can see in the picture. I’ve attached the 3mf. As I gathered from Bambustudio, the speed is the same everywhere. The flow is the same. What’s strange is that it doesn’t just affect this component, but several other models as well. The printer only has about 50 printing hours on the clock, so it’s practically new. I can’t imagine extrusion problems, since the prints lower down and everything above are great. That’s why such phenomena do surprise me.
I’ve seen a similar problem in another post and the tips didn’t help either: https://forum.bambulab.com/t/rough-spots-on-sides-of-surface-with-silk-pla/126888
Have any of you had any experience with this print problem?
Here are the specifications:
Printer: Bambulab P1S Combo with Bambulab anti-vibration feet.
Filament: Sunlu PLA Black Matte (dried and calibrated)
Object orientation: Vertically facing the door and 250mm high. (3mF)
Print speed of wall contours: 250 - 260mm/s
AMS: Used regular AMS and not AMS2
Upgrades: No upgrades or mods except for the Bambu PTFE Guide toolhead from Makerworld.
Thanks in advance for any suggestions and possible solutions. Test_Holdplate.3mf (100,0 KB)
I checked your file and found no noticible issue with speed, layer times, etc…
Do you have this issue with this specific print or all of them at the same height?
If with the print, there are some tweaks you may try, as different infill and number of walls…
If this is a systematic error, i.e. occurs with any print at the same height, I would start by opening a TT with the BL support team.
Are the rough spots facing the aux fan? If so, try winding it down to 10%. You could turn it off completely but I figure 10% helps with cooling (of the entire chamber, not the model) as it will draw colder air from the bottom
no, interestingly, the rough surface is always on the unfacing side, or even toward the door. But never toward the auxiliary fan or the back of the printer. Since the print bed also moves downward, if this were to occur, the phenomenon would have to move vertically over a much larger area.
thank you.
I’ll try a different wall count in combination with a different infill. Maybe that will help.
I’ll definitely do a few more test prints with a large cube model in the next few days to see if the problem is limited to a specific area of the objects and a specific area on the print bed. I’ll report back.
