PrusaSlicer is starting my first purge in mid air?
I'm trying to print a pretty simple model using the default profile for my MK4S MMU. The slicer visualisation shows that the purge is starting in mid air, and indeed the printer keeps thinking that the filament is stuck and therefore halting the print.
When I view the GCode, it seems the default start GCode is the problem because when the "extrude purge line" starts, the Z-axis position is still at Z15 from the "prepare for purge" section.
I don't understand how I didn't notice this until now, because it appears in my old modified version of the default profile, too.
Picture of my purge line and screenshot of prusaslicer attached.
; prepare for purge
M104 S{first_layer_temperature[initial_tool]}
G0 X0 Y-4 Z15 F4800 ; move away and ready for the purge
M109 S{first_layer_temperature[initial_tool]}
G92 E0
M569 S0 E ; set spreadcycle mode for extruder
T[initial_tool]
G1 E{parking_pos_retraction + extra_loading_move - 15} F1000 ; load to the nozzle
;
; Extrude purge line
;
G92 E0 ; reset extruder position
G1 E{(filament_type[initial_tool] == "FLEX" ? 4 : 2)} F2400 ; deretraction after the initial one before nozzle cleaning
G0 E7 X15 Z0.2 F500 ; purge
G0 X105 E36 F500 ; purge
RE: PrusaSlicer is starting my first purge in mid air?
The slicer visualisation shows that the purge is starting in mid air
That is expected behavior. Mk4, XL, Core, all start the purge in mid-air.
the printer keeps thinking that the filament is stuck and therefore halting the print.
Now that is not expected behavior. Why it does it, I don't know but it's not connected to the mid-air purge. *Is* is in fact stuck?
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: PrusaSlicer is starting my first purge in mid air?
I think the problem might have been because I was sometimes not cleaning the purge from the previous run. On my mk3S this wasn't an issue, but the blockage detection on the MK4S must think there is a problem because there is too much resistance to flow.
I have removed my custom GCode and I will come back here if I still have the problem when cleaning the purges and using the default GCode