Bottom of a sphere not clean

Hi everyone and happy new year.

I’ve a strange problem with my P1S, and can’t find how to solve.

Material is eSUN PLA+ with eSUN profile.

I’m printing a sphere, and the “under” part is like melted. Difficult to explain.

The angle is not too high (30°) and i made an overhang test, the printer is doing fine with much more.

Looks like the filament is shiny on the bottom, just where the problem starts. Layers seems not straight. I was thinking of a temperature problem, or too fast layers, but realy not sure and don’t know how to solve that !

Ca someone help me ?



The part is a gear lever knob for my old Peugeot 307 car i made on F360.

Pommeau.3mf (372,1 Ko)

Did you turn off the fans? This looks like a cooling issue.

No i didn’t change the fan speed. I checked on BambuStudio and fans are 100% startying a layer 2.

Can you show a screenshot of the slicer in preview mode

Here it is.

PLA is not ideal for use in a car, it will deform in the heat. PLA generally needs plenty of cooling, P1s often need to print with door open for pla. I would suggest you callibrate the filament for your printer. Orca slicer has some useful test prints for setting temperature, overhangs, etc.

Too much overhang on the layers. I had a similar issue with a few Lithophane globes, had to change my layer height to .12 so it wasnt hanging off too far.

2 Likes

Thanks everyone for your answers.

@debonr i now PLA isn’t great in a car, but i often print my prototypes on PLA before going to ABS. I’m not very good with Fusion 360 and sometimes my pieces don’t fit on first try !

@Frank_Stanton i’ll try with smaller layers, but i’m surprised the angle isn’t so high. Anywayn, it’ll help with acetone smoothing on the final piece !