What a great idea! I wanted to print top vents for my P1S in Bambu PETG-CF and it started out as a pretty cursed filament. With the help of content in this thread and others I managed to improve the quality drastically:
To do this I used the settings below. Critically once the settings are in place run a full calibration on the filament. Both flow dynamics and flow rate. My K value barely changed at 0.017, but the flow ratio was way off in the stock profile. I’ve ended up with a flow ratio of 1.0707. I think the built-in profile is designed specifically for the X1 with the idea that automatic calibration will set these values correctly.
I’ve also tweaked the temperature down to 255 from 250. 260 would work as well. Based on the temperature tower I printed, 255 was a halfway house between 250 and 260 in terms of advantages and disadvantages. I ended up preferring 250.
For me I had to print with glass top off and front door open.
Anyway, on to the settings:
Filament
Temperature: 250
Flow Ratio: 1.0707 (calculate your own)
Filament Cooling
Min fan speed: 40%, 30 layer time
Max fan speed: 90%, 10 layer time
Keep fan always on
Slow printing down
Force cooling for overhangs & bridges
Overhang threshold: 10%
Fan speed for overhangs: 100%
Aux fan: 30%
Exhaust fan: 70%
Filament Advanced
Add to the bottom of start G-code:
; Change Z offset
G29.1 Z0.03
Quality
Precise wall (experimental)
Avoid crossing walls
Max detour length: 200%
Strength
Top / bottom shell layers: 6
Infill: Gyroid (shouldn’t matter)
Speed
Outer wall: 100
Inner wall: 150
Sparse infill: 150
Internal solid infill: 150
Top surface: 100
Gap infill: 150
Bridge: 50 external, 150% internal
Normal acceleration: 5000
First layer (acceleration): 1500
I also used the Z offset gcode.
I’m just printing the actual parts now, we’ll see if they turn out OK or not. I’m sure there can be more tweaks made, but I need to get this stuff printed!