Start heating bed and extruder and level bed at the same time

[JazekerXX 0]

yep, just checked it works, NICE!
 

the bed and nozzle heat up at the same time, nozzle pre-heats to 180C and after the bed reached the set temp then the nozzle heats further to set temp.

 

thx ahoeben for the help!

[athlon1400 0]

As I found a bug in this code.

 

Problem : If bed temp reached target before nozzle, it will start printing right away.

Solution : Double check by add code;

 

M104 S{material_print_temperature} ; start heating nozzle but don't wait

M190 S{material_bed_temperature} ; start heating the bed to target temp and wait

M109 S{material_print_temperature} ; heating nozzle and wait until target temp then start printing

 

[Miotch 1]

I've had luck with below since bed always reaches temp before nozzle on mine. No wait for bed then wait for nozzle. I put this before G28 Auto Home/G29 ABL for the extra time to level temp and get better bed leveling.  If temps not level by G28 I believe you could add a G4 after to wait until steady but seems to work w/o so far. 

 

Quote

M140 S{material_bed_temperature} ; start heating the bed to what is set in Cura

M109 S{material_print_temperature} T0 ; start heating hotend to what is set in Cura and WAIT

 

[twideman 0]

This works well in my Cura 4.8 but not Creality Slicer 1.2.3. For some reason the Creality Slicer 1.2.3 ignores the M140 and M104 commands completely. I have tried different variations (e.g. "M140 S60" "M140 S{material_bed_temperature}" "M140 S{material_bed_temperature_layer_0}" and none work with Creality Slicer 1.2.3. Does anyone have a similar experience or fix for the M104 and M140 commands in Creality Slicer 1.2.3?

[dunca17 0]

hi, i am complete new to g codes and 3d printing, I've set my glass hot bed and have a blt sensor, I am trying to get the bed to heat up first before the hot end as I seem to have a lot of leakage from the nozzle during the auto level process, also i keep having to alter the z offset every time I reset the printer 

 

this is the code i have, ive tried to follow this post

 

M140 S{material_bed_temperature} ; start preheating the bed WITHOUT wait to what is set in Cura

M104 S{material_print_temperature} T0 ; start preheating hotend WITHOUT wait to what is set in Cura

 

M280 P0 S160 ; BLTouch alarm release

G4 P100 ; delay for BLTouch

 

; Ender 3 Custom Start G-code

G92 E0 ; Reset Extruder

G28 ; Home all axes

G29 ; Auto bed-level (BL-Touch)

G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position

G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line

G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little

G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line

G92 E0 ; Reset Extruder

G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

G1 X5 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish

 

thanks

[bluefirevortex 0]

On 1/1/2022 at 6:08 PM, dunca17 said:

hi, i am complete new to g codes and 3d printing, I've set my glass hot bed and have a blt sensor, I am trying to get the bed to heat up first before the hot end as I seem to have a lot of leakage from the nozzle during the auto level process, also i keep having to alter the z offset every time I reset the printer 

 

this is the code i have, ive tried to follow this post

 

M140 S{material_bed_temperature} ; start preheating the bed WITHOUT wait to what is set in Cura

M104 S{material_print_temperature} T0 ; start preheating hotend WITHOUT wait to what is set in Cura

 

M280 P0 S160 ; BLTouch alarm release

G4 P100 ; delay for BLTouch

 

; Ender 3 Custom Start G-code

G92 E0 ; Reset Extruder

G28 ; Home all axes

G29 ; Auto bed-level (BL-Touch)

G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position

G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line

G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little

G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line

G92 E0 ; Reset Extruder

G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

G1 X5 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish

 

thanks

 

You almost had it, but forgot to move the g28 and g29 up to after the G4 P100.  This is the way because it starts the autoleveling before your nozzle gets too hot to start oozing.  Option 1 should be the fastest way to get your prints going, the second option I gave will take a bit longer, while providing debatably more "level" prints. 

 

; Ender 3 Custom Start G-code
M140 S{material_bed_temperature} ; start preheating the bed WITHOUT wait to what is set in Cura

M104 S{material_print_temperature} T0 ; start preheating hotend WITHOUT wait to what is set in Cura

M280 P0 S160 ; BLTouch alarm release

G4 P100 ; delay for BLTouch

G28 ; home

G29 ; auto bed leveling

M190 S{material_bed_temperature} ; start heating the bed to what is set in Cura and WAIT

M109 S{material_print_temperature} T0 ; start heating hotend to what is set in Cura and WAIT

G92 E0 ; Reset Extruder

 

G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position

G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line

G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little

G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line

G92 E0 ; Reset Extruder

G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

G1 X5 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish

 

 

 

Some people have discussed leveling before the bed is hot. If that is a concern, and you want the bed to get hot, but not the nozzle to prevent nozzle ooze, I suppose you could always put this; It should heat up your print bed to temp. Then start to heat up your nozzle while running the home and autoleveling process. It should finish the auto leveling before any real amount of ooze starts. However, if you notice alot of oozing try moving the

"M104 S{material_print_temperature} T0 ; start preheating hotend WITHOUT wait to what is set in Cura"

to behind the

"G28 ; home" 

That would allow it a few extra seconds before starting to heat up the nozzle. 

 

; Ender 3 Custom Start G-code
M190 S{material_bed_temperature} ; start heating the bed to what is set in Cura and WAIT

M104 S{material_print_temperature} T0 ; start preheating hotend WITHOUT wait to what is set in Cura

M280 P0 S160 ; BLTouch alarm release

G4 P100 ; delay for BLTouch

G28 ; home

G29 ; auto bed leveling

M109 S{material_print_temperature} T0 ; start heating hotend to what is set in Cura and WAIT

G92 E0 ; Reset Extruder

G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position

G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line

G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little

G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line

G92 E0 ; Reset Extruder

G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

G1 X5 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish

[GregValiant 1,307]

Sometimes you will set up Cura to have a different temperature for the first layer.  That requires a different keyword.  Folks who have auto-levelers don't like having the nozzle drool during leveling.  Gcode is a simple step-by-step language and so the order that the commands are in is important.

This is a variation of my StartUp Gcode for PLA (I don't AutoLevel but I've altered this for an auto-level system).

;

; Greg's Start G-code

;

M82      ;Absolute Extrusion

G90      ;Absolute Movement

M140 S{material_bed_temperature_layer_0} ;Start heating the bed to "Initial Layer Bed Temperature"

M109 S165 ;Warm up the hot end and wait for it to hit the temp.

G92 E0      ; Reset E

G28     ; Home XYZ axes.  This would be G28 X Y if you don't home the Z for some reason.

G29      ;Auto Level command

G0 Z10.0 F3000      ; Move Z

G0 X1 Y1 F6000      ;Move back near the left front corner

M109 S{material_print_temperature_layer_0}      ;Finish heating the hot end to "Initial Layer Print Temperature"

M190 S{material_bed_temperature_layer_0}      ;Just in case the bed hasn't gotten up to temperature yet.

G0 X1.0 Y20 Z0.3 F5000.0      ; Move

G1 X1.0 Y200.0 Z0.3 F2400.0 E15      ; First purge line

G0 X3.0 Y200.0 Z0.3 F5000.0      ; Move

G1 X3.0 Y20 Z0.3 F2400.0 E30      ; Second purge line

G1 E28 F1800      ;2mm retraction

G92 E0      ; Reset Extruder

G0 Z10.0 F3000     ; Move Z Axis up

G0 X20 Y35 Z10 F5000.0      ; Move over to prevent blob squish

M220 S100        ;reset feedrate to 100%

M221 S100     ;reset flowrate to 100%

;

;End of StartUp

;

 

I print PLA fairly quickly, PETG at about 1/2 my PLA speed, and TPU at 12mm/sec.  The purge line speeds are hard coded into the startup gcode and are kinda fast for PETG and way to fast for TPU.  My fix was to install 2 additional Ender 3 Pro's in Cura.  The TPU printer has the purge line speeds at 10mm/sec and the PETG printer has the purge lines at 25mm/sec.  The PLA startup gcode is the one above and you can see that the purges go own at 40mm/sec as they are very high flow.

Edited March 23, 2022 by GregValiant