Start Extruder Heating After Bed Leveling

Has anyone been able to find the settings or find a solution to start the extruder heating after the bed leveling is complete?
The extruder typically gets to the desired temperature before the first row of leveling is done and beings to drip filament and gunk up the nozzle. If possible, I would like to eliminate bed leveling every time, or delay the extruder heat time to after the bed leveling.

 

I was having problems with oozing and strings being pulled into the start of the print. Here's what I did. Put this into your "Before print job starts". You may want to copy your original script before modifying so you can get back to stock. Works pretty well, but your mileage may vary... I used these to try and get the extruder and bed to arrive at temp at the same time.

M190 S45 ;preheat to 45 bed and wait (starts bed heating since it takes awhile)
M140 S60 ;heat bed to 60 and continue
M104 S150 ;preheat extruder to 150 and continue (lower temp to avoid dripping)
; set to millimeters
G21
; set to absolute mode
G90
; zero extruder
G92 E0
; turn off fans
M107
; home all axis
G28
; probe for bed autolevel plane
G29
;pause for 2 secs
; G4 S2
; move bed down 15mm
G1 Z15 F300
; move to front left corner
G1 X1 Y1 F7200
; move bed to printing position before reaching extruder temp to eliminate ooze
G1 Z0.3
; heat to priming line temp
M140 S60
M109 S195
; print priming line
G1 X155 E10.0 F500 ;Stop extruding early to eliminate strings
G1 X194 F500 ;continue without extruding to eliminate strings
; move bed down and out to break string
G1 Z30 X150 Y20 F7200
; zero extruder
G92 E0
; set movement speed
G1 F7200

 

That, and I had an issue this morning where the autolevel failed to see the bed at one step and thus drove it right into the hot extruder, obviously marking the surface.

So I've reviewed my code in Cura to the following (no startup code in octoprint):

Code:

; START GCODE

; Set to millimeters
G21
; Set to absolute mode
G90
; Zero extruder
G92 E0
; Turn off fans
M107
; Start heating bed
M140 S{material_bed_temperature}
; Home all axis
G28
; Probe for bed autolevel plane
G29
; Pause for 2 seconds
G4 S2
; Move bed down 15mm
G1 Z15 F300
; Move to front left corner
G1 X1 Y1 F7200
; Start heating extruder - optional, save some time
M104 S{material_print_temperature}
; Wait for bed to finish heating if necessary
M190 S{material_bed_temperature}
; Wait for extruder to finish heating if necessary
M109 S{material_print_temperature}
; Move bed to printing position
G1 Z0.3
; Print 190mm priming line
G1 X190 E15.0 F500
; Move bed down
G1 Z15 F300
; Zero extruder
G92 E0
; Set movement speed
G1 F7200

; end of START GCODE

 

Thanks for the input, but where do I find those settings for the R2 or Cura. I haven't modified any code yet with the new printer.

 

In Cura settings->printer->manage->machine settings. On the printer itself it's on the Octoprint web interface in settings -> Gcode scripts.

 

Temp profile at print start from cold with my new setup looks great:



Bed starts heating first thing so it's already got 3 mins to work with during the homing and bed leveling sequences. Once that's done the extruder moves to the corner and heats up (and potentially oozes there in a "safe" place), before starting the priming line and printing. At 190/50 both get ready at about the same time so wasted time is minimal.