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UM2 Not purging filament before print


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Posted (edited) · UM2 Not purging filament before print

Hey guys and gals;

I've been printing with my UM2 for a while now and its always purged a bunch of filament before the print starts but now for some reason it doesn't. Did I accidentally change something in my settings or in Cura? I updated Cura and firmware to no avail.

Thanks, Ryan

EDIT: Factory reset of the printer has fixed the issue... wierd.

Edited by Guest
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    Posted · UM2 Not purging filament before print

    The purge distance is in the firmware, maybe your Teflon is a bit deformed and that the filament has a hard time to get passed it at the beginning....

    Are you experiencing underextrusion?

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    Posted · UM2 Not purging filament before print

    I see then you are probably printing in reprap gcode and not UltiGCode.

    This setting can be changed in the printer settings.

    You need reprap to use octoprint for example but if you print for the sdcard then better to use UltiGcode

    In reprap mode you have a start and end gcode where you need to specify the purge sequence

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    Posted · UM2 Not purging filament before print

    I see then you are probably printing in reprap gcode and not UltiGCode.

    This setting can be changed in the printer settings.

    You need reprap to use octoprint for example but if you print for the sdcard then better to use UltiGcode

    In reprap mode you have a start and end gcode where you need to specify the purge sequence

     

    Cura was set to UltiGcode in machine setting and generated this gcode:

     

    ;FLAVOR:UltiGCode;TIME:4958;MATERIAL:13747;MATERIAL2:0;NOZZLE_DIAMETER:0.400000;NOZZLE_DIAMETER2:0.400000;Layer count: 88;LAYER:0M106 S255G0 F9000 X81.398 Y83.907 Z0.250G0 X81.798 Y83.708;TYPE:SKIRTG1 F1200 X82.986 Y82.521 E0.16794G1 X89.416 Y82.521 E0.81094

     

    When I tried changing to RepRap Marlin/Sprinter just then it was like this

     

    M190 S70.000000M109 S210.000000;Sliced at: Wed 18-05-2016 23:49:42;Basic settings: Layer height: 0.25 Walls: 1.2 Fill: 20;Print time: 1 hour 14 minutes;Filament used: 2.011m 17.0g;Filament cost: 0.77;M190 S70 ;Uncomment to add your own bed temperature line;M109 S210 ;Uncomment to add your own temperature lineG21        ;metric valuesG90        ;absolute positioningM82        ;set extruder to absolute modeM107       ;start with the fan offG28 X0 Y0  ;move X/Y to min endstopsG28 Z0     ;move Z to min endstopsG1 Z15.0 F9000 ;move the platform down 15mmG92 E0                  ;zero the extruded lengthG1 F200 E3              ;extrude 3mm of feed stockG92 E0                  ;zero the extruded length againG1 F9000;Put printing message on LCD screenM117 Printing...;Layer count: 88;LAYER:0M106 S255G0 F9000 X81.398 Y83.907 Z0.250G0 X81.798 Y83.708;TYPE:SKIRTG1 F1200 X82.986 Y82.521 E0.02457G1 X89.416 Y82.521 E0.11865

     

    Should the UltiGCode look like that? It seems to be missing all the initialization stuff?

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