Cura Start and End GCode?

Icthus

I've searched and I can't seem to find anything relevant to this and it could be my simple ignorance to this (As I'm new to the Duet and reprap firmware) but I can't seem to find anyone using 'Suggested' gcode start and end code?

Can I ask what all you lot out there are using in yours? I'm trying to work out what is needed and not needed now with my new setup.

This is what I am using now as it was what I used on my old printer

Start Code

G21 ;metric values
G90 ;absolute positioning
M82 ;set extruder to absolute mode
M107 ;start with the fan off
G28

End Code

M104 S0 ; turn off extruder
M140 S0 ; turn off bed
G1 X0 Y200 F1000 ; prepare for part removal
M107 ; Fan Off
M84 ; disable motors

I do get errors on start a print now but I'm not sure whats best to put in there? Should I do G29? As I have the mini IR sensor for auto leveling.

I'm curious to see what everyone else does for theres

Thanks

Gareth

darookee

My Start-script (using slic3r) is this:

M140 S[first_layer_bed_temperature] ; set bed temperature with 
;M104 S[first_layer_temperature]         ; set extruder temperature tool selection
M98 P/sys/before_print.g

The commented out M104 is so that slic3r thinks it's setting the extruder temperature, when it's actually not.

/sys/before_print.g looks like this:

M80 	; turn PSU on
T0      ; Select tool 0
M116	; Wait for tools

G32 	; call bed.g

; Purge line
G1 Z0.2
G1 Y2 X25 F15000        ; move out of build volume
G1 X175.0 E24 F1200     ; finish purge line
G4 P5000	        ; Wait to let the plastic cool a little 
G1 X100.0 Y100.0 F15000 ; Move to middle to rip plastic off tip
G92 E0                  ; reset extruder position to 0

and bed.g looks like this, so I probably could replace the G32 with G29 S1…

; Clear any bed transform
M561
; Home all axes
G28
; Grid compensation
G29 S1

What this all does is

Setting the bed temperature
Selecting the first tool (the printer only has one)
Waits for all the temperatures to be at the set point
loads the mesh compensation map
extrudes a bit of filament to the front of the bed

Icthus

Thank you very much darookee, can I ask what setup you have as well?

burtoogle

My cura start/end scripts for a kossel delta (using relative extrusion mode) are:

[[language]]
G28 ; home all axes
G1 X0 Y0 Z25 F8000 ; descend

and

[[language]]
M83 ; extruder relative mode
G1 E-2 F2000 ; retract
M104 S0 ; turn off extruder
M140 S0 ; turn off bed
M106 S0 ; turn off fan
G28 ; home
M84 ; disable motors

Please remember that in cura, the extrusion mode is set to absolute before the scripts are inserted even if relative extrusion mode is enabled in the cura settings. I know this is dumb but the cura devs insisted upon it.

darookee

@Icthus:

Thank you very much darookee, can I ask what setup you have as well?

My printer is a HyperCube-y CoreXY using the extruder of the Wanhao i3 I ripped apart…