/diy/ - Do It Yourself

Reposting from last thread:
First printed the cube on the left with a custom designed extruder, had some severe underextrusion, axes weren't calibrated, some other minor problems. Mostly ghosting resulting from that inconsistent extruder.
Calibrated the axes properly, and installed a Bondtech QR. Set E-steps to their recommended value (not sure if that's a good idea without calibrating E-steps, but hey), and printed the cube on the right. Ghosting due to the extruder is gone, but with the X-Y bed it's still got some scruffy looking corners - so I'm going to do some acceleration tuning next. what's the deal with the top surface though? The ''outlines'' are perfect, but the middle square is extremely rough. Overextrusion with the nozzle dragging through it? Anybody got an idea here?
>Yes I read the sticky
>No Simplify doesn't have a solution

>Printer make & model: Custom built, X,Y-bed with a Z-head for research purposes
>Filament type/brand: Nylon 12, unknown brand
>Bed & extruder temperature: 265C head, 80C bed, 0 cooling, no enclosure (yet)
>Print speed: 30mm/s max
>Nozzle size: 0.8mm
>Layer height: 0.2mm
>Wall number: 3
>Top/bottom layers: 8
>Infill: 30%
>Retraction: 0.5mm @ 10mm/s
>Brim lines: 10 (8mm total)

PRevious suggestions: overextrusion (solved with E-step calibration), too many top layers (solved by reducing top layers). Any other ideas while I test the latter theory?

First printed the cube on the left with a custom designed extruder, had some severe underextrusion, axes weren't calibrated, some other minor problems. Mostly ghosting resulting from that inconsistent extruder.
Calibrated the axes properly, and installed a Bondtech QR. Set E-steps to their recommended value (not sure if that's a good idea without calibrating E-steps, but hey), and printed the cube on the right. Ghosting due to the extruder is gone, but with the X-Y bed it's still got some scruffy looking corners - so I'm going to do some acceleration tuning next. what's the deal with the top surface though? The ''outlines'' are perfect, but the middle square is extremely rough. Overextrusion with the nozzle dragging through it? Anybody got an idea here?
>Yes I read the sticky
>No Simplify doesn't have a solution

>Printer make & model: Custom built, X,Y-bed with a Z-head for research purposes
>Filament type/brand: Nylon 12, unknown brand
>Bed & extruder temperature: 265C head, 80C bed, 0 cooling, no enclosure (yet)
>Print speed: 30mm/s max
>Nozzle size: 0.8mm
>Layer height: 0.2mm
>Wall number: 3
>Top/bottom layers: 8
>Infill: 30%
>Retraction: 0.5mm @ 10mm/s
>Brim lines: 10 (8mm total)