RRC[

Rat Rig Community [Unofficial]•3y ago•

7 replies

im too uncreative

Large gaps in first layer, unsure what to try next (V-Core 3.1 400mm)

Hi everyone,

I did my first test print yesterday, following the commissioning guides closely. As seen in the images, I have large gaps in my first layers, except strangely for the corner it begins printing first (second photo, top right of print). I strongly believe my nozzle / Z is offset correctly.

What I have kept constant:
- eSun PLA+ (210-230 C), (45-60 C bed)
- Rapido hotend, 0.4mm nozzle with 4028 fan
- 7x7 mesh before every print
- My mesh is within 0.27mm
- 40mm max print speed

What I have changed (admittedly in no real scientific fashion):
- Print temp (200 - 220 C)
- Bed temp (60 - 65 C)
- First layer line width (0.52 - 0.60)
- Fan speed (50 - 0 %) --> Changing this has made the biggest difference, although nothing amazing)
- Pressure advance (0.05 - 0)

Regarding pressure advance, I believe this is my largest issue (based on photos of similar looking first layers), although I don't properly understand how to change it, or where to find out how to change it. I have looked at ellis3dp's info on pressure advance, to no avail.

Initially I believed pressure advance to be off, based on "printer.cfg" commenting out,
"#pressure_advance: 0.05",
although when starting a print I noticed in the console it would print,
"pressure_advance: 0.05"
"pressure_advance_smooth_time: 0.04"

I couldn't find where to change pressure advance in SuperSlocer, although I believe it is possible, instead I typed in the console,
"SET_PRESSURE_ADVANCE ADVANCE=0"
it responded,
"pressure_advance: 0"
"pressure_advance_smooth_time: 0.04"
This, I believed pressure advance was now off, although I am not certain.

In short, I believe this terrible first layer to be due to pressure advance, what do you people think?
Can I change pressure advance within SuperSlicer, if so, where?

I am not looking for perfection yet, but I really haven't seen any real progress in my attempts to fix this issue. Thanks for any help.