u/CatalinMinzat

Hi! I have a p1s from bambu

Even after a big number of flow calibration done, pressure advance and Volumetric speed adjustments, I can't get a smooth top surface, even if in the beginning i got pretty nice top surfaces from the same filament.

What can cause this?

Middle looks smoother, wall side looks pretty bad.

Tried a 0.1 layer height, better results, but at a closer look, same look as with the 0.25 layer.

K is 0.035

Best flow was 1.015 based on calibration

0.25 layer height

0.4 top surface width

0.4 nozzle

Bambu slicer

I've used this printer for the past year, and got good results lately after a good rebuild with new rollers, new extruder wheels, a better direct drive sistem, bigger fan for the mobo, high speed fan for the extruder, AliExpress extruder mechanism and a well optimized marlin 2 firmware.

I got excellent results with pla, petg, abs and tpu.

And after this, i turned on the speed, by curiosity.

It found its limits at:

3000mm/s(xy) Printing acceleration( from 450 stock)

1400(z)

5500(e)

5000(travel)

200mm/s max outer walls and top layers

350mm/s max inner walls

0.25 layer height

265-270c extruder temp

0.45mm outer lines

0.5mm inner ones

0.42 top layer

About 30 mm³/s volumetric on inner walls and 23 for other layers

I will post in the comments the results. Never thought this can be achieved by this printer

Some data

The part i printed took 43 minutes with solid infill with speed settings

And 3h and 48m with normal setting i got used to.

Usually 35-50mm/s speed and 10 volumetric flow

No ants were hurt in the making of this video