I'm looking for an extra line of Gcode to add to my end. code file that will retract the filament as soon as the print is finished before the nozzle lifts away from the print. As at the moment I get a bit of a bump from nozzle ooze at the end which isn't helping my finished top layer. Just having a look through some existing Gcode and I think it uses G1 F960 as the retraction would that be correct? I have highlighted the line in my end code in Red that I was hoping would solve this issue but it doesn't G91 G1 F70 G1 E-10 F30000 ;suck the filament back quickly to stop ooze #this line doesn't seem to work G1 Z7 F70 ;lifts nozzle 7mm from finished print surface G1 F2300 G1 X-10 Y100 F2300 ;moves bed out for easy job removal G90 M104 S0 ;turns extruder off https://reprap.org/forum/read.php?154,91783,91783#msg-91783 Mon, 13 Apr 2026 01:39:09 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?154,91783,92752#msg-92752 https://reprap.org/forum/read.php?154,91783,92752#msg-92752 NelsonRap Skeinforge Tue, 02 Aug 2011 19:34:43 -0400 https://reprap.org/forum/read.php?154,91783,92751#msg-92751 https://reprap.org/forum/read.php?154,91783,92751#msg-92751 forums.reprap.org]]]> jv4779 Skeinforge Tue, 02 Aug 2011 19:24:05 -0400 https://reprap.org/forum/read.php?154,91783,92638#msg-92638 https://reprap.org/forum/read.php?154,91783,92638#msg-92638 NelsonRap Skeinforge Mon, 01 Aug 2011 19:01:37 -0400 https://reprap.org/forum/read.php?154,91783,92636#msg-92636 https://reprap.org/forum/read.php?154,91783,92636#msg-92636 Sublime Skeinforge Mon, 01 Aug 2011 19:00:17 -0400 https://reprap.org/forum/read.php?154,91783,92632#msg-92632 https://reprap.org/forum/read.php?154,91783,92632#msg-92632
G91
G1 F70
G1 E-15 F30 ;suck the fillament back quickly to stop ooze
G1 Z7 F70 ;lifts nozzle 7mm from finished print surface
G1 F2300
G1 X-10 Y100 F2300 ;moves bed out for easy job removal
G90
M104 S0 ;turns extruder off

but for some reason SF41 will not put the line of code highlighted in red in. Not one of my sets of Gcode have that line yet it is in my end file]]> NelsonRap Skeinforge Mon, 01 Aug 2011 18:34:08 -0400 https://reprap.org/forum/read.php?154,91783,91970#msg-91970 https://reprap.org/forum/read.php?154,91783,91970#msg-91970
I agree with Sublime, your speed is probably too high. I'm using Skeinforge 41 and have a final retraction with feed rate of F3000, though I do it like this using absolute positioning, and don't raise the head:

G92 E0 ;reset extruder home
G1 E-10 F3000 ;retract to avoid ooze
G92 E0 ;reset extruder home
G1 X0 Y0 F4000.0 ;move to X Y home
M104 S0.0 ;Heater off]]> droftarts Skeinforge Tue, 26 Jul 2011 06:48:48 -0400 https://reprap.org/forum/read.php?154,91783,91929#msg-91929 https://reprap.org/forum/read.php?154,91783,91929#msg-91929 -------------------------------------------------------
> G1 E-10 F30000 ;suck the filament back quickly to
> stop ooze
>
> This should work except it is faster than your
> machine will move. 30000mm/m / 60 = 500mm/s so try
> something like:
>
> G1 E-10 F300 ;suck the filament back quickly to
> stop ooze

My thinking was leading me towards the speed being the issue, I'm going to reduce this substantially tomorrow and see what happens]]> NelsonRap Skeinforge Tue, 26 Jul 2011 00:46:12 -0400 https://reprap.org/forum/read.php?154,91783,91925#msg-91925 https://reprap.org/forum/read.php?154,91783,91925#msg-91925
This should work except it is faster than your machine will move. 30000mm/m / 60 = 500mm/s so try something like:

G1 E-10 F300 ;suck the filament back quickly to stop ooze]]> Sublime Skeinforge Tue, 26 Jul 2011 00:33:16 -0400 https://reprap.org/forum/read.php?154,91783,91924#msg-91924 https://reprap.org/forum/read.php?154,91783,91924#msg-91924 brnrd Skeinforge Tue, 26 Jul 2011 00:33:01 -0400 https://reprap.org/forum/read.php?154,91783,91917#msg-91917 https://reprap.org/forum/read.php?154,91783,91917#msg-91917 NelsonRap Skeinforge Mon, 25 Jul 2011 23:46:32 -0400 https://reprap.org/forum/read.php?154,91783,91783#msg-91783 https://reprap.org/forum/read.php?154,91783,91783#msg-91783
Just having a look through some existing Gcode and I think it uses G1 F960 as the retraction would that be correct? I have highlighted the line in my end code in Red that I was hoping would solve this issue but it doesn't



G91
G1 F70
G1 E-10 F30000 ;suck the filament back quickly to stop ooze #this line doesn't seem to work
G1 Z7 F70 ;lifts nozzle 7mm from finished print surface
G1 F2300
G1 X-10 Y100 F2300 ;moves bed out for easy job removal
G90
M104 S0 ;turns extruder off]]> NelsonRap Skeinforge Mon, 25 Jul 2011 00:38:54 -0400