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Rat Rig Community [Unofficial]•2y ago•

25 replies

DSPuzzles

V-Minion - Consistent perimeter print errors (Single wider layer + void)

Hey everyone!

My V-Minion has been great, I'm super happy with it, but it's still in a fine-tuning phase to get to its full potential. Most of the things I've printed come out great, but for some reason, this part (and variations on it) have two consistent print issues on every print, and I can't seem to be able to get fully rid of them.

I have attached a photo showing both, and I'll provide some more photos from different prints below.

The first problem (red box) is that I get a void in that exact spot every time, no matter how many perimeters I use. The second issue (Black box) is that I get a single wider layer on the exact same spot every time.

I have tried many things in order to get rid of these issues, but nothing seems to be helping.

Things I've tried:
- Changing speeds:
If slowed down to extremely slow speeds, it helps but doesn't fully fix the issue

- Changing temperatures:
No effect.

- Changing cooling:
No effect.

- Adding perimeters:
No effect.

Disabling pressure advance:
Setting

pressure_advance: 0.0

pressure_advance: 0.0

does not help, but I', not sure if that fully disables pressure advance.

Relevant information:
Material: PETG @ 225 °C
Hotend: Rapido 2 UHF
Nozzle: Chinese CHT nozzle, 0.6mm
Extruder: LGX Lite
Supports: Custom designed in CAD, with settings override for less perimeters and infill. Red box defect happens exactly at the height supports end at.

Please let me know if any other info would be helpful.

Thank you in advance for any help you can provide, it's super appreciated!