Filament ejecting after print...argh

I can't figure out why the filament is ejecting ALL THE WAY OUT of my bowden tube after a print finishes when i switched to the Duet/Dc42 firmware...

I thought it was these lines in the default "end gcode" for the cura slicer that repetier host uses:

;G91 ; Relative positioning
;{IF_EXT0}T0
;G92 E0 ; Reset extruder position
;{IF_EXT0}G1 E-1 ; Reduce filament pressure
;G92 E0 ; Reset extruder position

but as you can see i commented them out...and it still does it... very annoying.

Anyone have a clue why?

Ive checked the gcode files on the sdcard (from the github repo) but I don't see anything.

Edited 1 time(s). Last edit at 01/23/2016 10:01PM by thetazzbot.

Can you put together a small example gcode file that demonstrates the problem, and attach.it to a post?

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

Common issue with cura engine default end g-code used by cura engine.
Just put M83 right after G91 in end g-code.

As it is by default (w/out M83), it's actually telling the extruder motor to go back to *absolute* -1 position, hence the full unloading
I can only speculate that on other firmware, G91 implies relative movements of extruder motor too while that seems not to be the case with RRF.

Edited 1 time(s). Last edit at 01/24/2016 06:11AM by mandrav.