External Perimeter Vertical Walls Flaking
On most of my initial prints for the enclosure (see more here: https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/factory-reset-slow-extrusion-of-filament-95100-flow ) this has happened. (See image below)
I have increased perimeters and also increased extrusion width for external & default perimeters. At the moment, the print has improved quality 3x, although I am still having trouble with the external walls flaking and not attaching to the internal perimeters.
The next print, I am going to increase extrusion width from .45mm to .55mm; on PrusaSlic3r the external perimeters noticeably have increased, although we will see results on the next print.
For semantics, I currently have:
- .4mm Nozzle
- Flowrate: 115-120
- Nozzle Temp: 250-255
- Bed Temp: 85-90
- Infill: 25%
- Material: Prusament PETG
- Room Temp: 75F
- Humidity: 50%
- Filament Age: < Week
RE: External Perimeter Vertical Walls Flaking
Update:
Increasing perimeters only creates an onion type effect for the vertical walls/shells. The only other option I have not fiddled with is the infill/perimeter overlap.
Has anyone else discovered the same results or is it only me?
RE: External Perimeter Vertical Walls Flaking
I changed perimeters to one and now we are groovy. Super strong Prusa Research quality part.
RE: External Perimeter Vertical Walls Flaking
Have you inspected that volumetric flow rates are within normal PETG limits? PETG intralayer adhesion problems are usually speed related.: print to fast and bonding strength suffers.