heathenx

Daid, You, sir, are brilliant! The G92 E0 worked like a charm. BIG BIG thanks! Problem solved.

Thanks for the reply, Daid. My starting and ending gcode is identical on all slicers that I've tried. Here's what I have in Cura right now. Starting: ;Sliced at: {day} {date} {time} ;Basic settings: Layer height: {layer_height} Walls: {wall_thickness} Fill: {fill_density} ;Print time: {print_time} ;Filament used: {filament_amount}m {filament_weight}g ;Filament cost: {filament_cost} ;M190 S{print_bed_temperature} ;Uncomment to add your own bed temperature line ;M109 S{print_temperature} ;Uncomment to add your own temperature line ;G21 ;metric values ;G90 ;absolute positioning ;M82 ;set extruder to absolute mode ;M107 ;start with the fan off ;G28 X0 Y0 ;move X/Y to min endstops ;G28 Z0 ;move Z to min endstops ;G1 Z15.0 F{travel_speed} ;move the platform down 15mm ;G92 E0 ;zero the extruded length ;G1 F200 E3 ;extrude 3mm of feed stock ;G92 E0 ;zero the extruded length again ;G1 F{travel_speed} ;Put printing message on LCD screen ;M117 Printing... ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; G28 ; home all axes ; ***start of purge line*** ;M320 acceleration enabled for all commands that follow (DISABLED TEMPORARILY) ;M201 X850 Y850 Z200 E10000; limit acceleration (ENABLED TEMPORARILY) G1 Z0.2 F6000.000; move to first layer height G1 X90 Y-90 F10000.000; move to front of build plate G1 X-90 Y-90 E24 F1000.000; extrude a purge line on the build plate G4 P2000; wait for ooze to slow G1 Z0.0 F6000.000; lower nozzle height to bed G1 X-90; wipe nozzle G1 Z0.2 F6000.000; move to first layer height G1 F10000; ensure fast travel to first print move ; *** end of purge line*** Ending: ;End GCode ;M104 S0 ;extruder heater off ;M140 S0 ;heated bed heater off (if you have it) ;G91 ;relative positioning ;G1 E-1 F300 ;retract the filament a bit before lifting the nozzle, to release some of the pressure ;G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more ;G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way ;M84 ;steppers off ;G90 ;absolute positioning ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;####Rostock Max#### M104 S0 ; turn off temperature M140 S0 G28 ; home X axis M84 ; disable motors M106 S0; turn off cooling fan if on (M106 S255 = 100% on) You'll notice from the starting gcode that I try to run an "anchor" line across my plate to help purge filament before I run the skirt and then my part. I understand it isn't necessary but it's a little extra purge.

I have this very same problem on my Rostock Max v2 but I'm unable to fix it. My printer just refuses to lay down a skirt before my print starts. It's like my extruder is starving for filament. Right now I have to play games with it if I want to use Cura (which I really like Cura by the way). Basically I run my skirt about 20mm outside of my part and run about 6 or 7 paths. By the time it finishes the skirt I've just barely squeaked out some filament and my print begins. This behavior doesn't happen if I use Simply3D, Slic3r, or MatterControl's Cura engine. It has me baffled. Once the actual print begins I get wonderful results. This issue is the only thing keeping me from running Cura on a regular basis.