When changing colors mid-print, the filament oozes out of nozzle after purge
When I'm in the middle of a print on my Core One and changing colors for the next layer, after purging the filament continues to ooze out for several seconds and I have to manually remove it before the print continues or it will drag it across my print. I'm assumed I could insert custom gcode to do the retraction between color changes and after the purge but I don't see a way to do that in PrusaSlicer. Something like this:
M83 ; set to relative G1 E-4 F900 ; retract 4mm at 15mm/sec
Best Answer by Steve:
Hello,
If I understand your inquiry correctly you are looking to insert custom G-code for filament changes in Prusaslicer. First, you must be in "expert mode" in the slicer (pull down selection in the top, right corner of the application window. In expert mode navigate to the "Printers" tab and select "Custom G-code from the column on the left. Scroll down and you will see a box labeled "Color Change G-code". By default Prusa includes the tool change command M600 as well as a line to purge additional filament before resuming. I personally remove the line for additional purge as it creates a problem similar to what you describe. This is where you would insert your G-code for the retractions. Once instantiated here, any model sliced using this "custom" printer will have that code inserted any time there is a tool (color) change.
Hope this helps,
Steve
RE: When changing colors mid-print, the filament oozes out of nozzle after purge
Hello,
If I understand your inquiry correctly you are looking to insert custom G-code for filament changes in Prusaslicer. First, you must be in "expert mode" in the slicer (pull down selection in the top, right corner of the application window. In expert mode navigate to the "Printers" tab and select "Custom G-code from the column on the left. Scroll down and you will see a box labeled "Color Change G-code". By default Prusa includes the tool change command M600 as well as a line to purge additional filament before resuming. I personally remove the line for additional purge as it creates a problem similar to what you describe. This is where you would insert your G-code for the retractions. Once instantiated here, any model sliced using this "custom" printer will have that code inserted any time there is a tool (color) change.
Hope this helps,
Steve
RE:
Thanks. I was in expert mode but neglected to scroll down. I spoke to tech support over chat last night and they informed me that they are not allowed to discuss custom gcode changes but I'm miffed that they didn't tell me were to look for the "Color Change G-code". I guess if I remove this code I should be OK and don't need to retract the filament.
G1 E0.3 F1500 ; prime after color change