Bed heats to temp initially then turns off

General Discussion
1

Basic Information:

Printer Model: CR6-SE
MCU / Printerboard: Stock Creality 4.5.2
klippy.log
klippy.log (1.8 MB)

Hi All,

I seem to be having an issue where the bed will heat up initially, but then wont turn back on to maintain the bed temp. I have tried to look into the log file, but frankly I only started printing back in march and I think I’ve hit the point where more knowledge than I can find is needed. If there is a topic already covering this, I’m all ears. Thanks

2

I had a look in your klippy.log

You use a bunch of macros.

I would go with this Failed to Load Crowsnest Extension - #4 by Sineos.

Sorry, probably no help. You may read the last point.

Good luck, hcet14

3

A lot of those macros are from the base klipper config that i grabbed, which was a premade config for my printer. A few are from the recommended setup of other parts.

That being said, that is a good perspective. I may just take some time to go through the macros and make sure i know all of what they are doing. Would you know any good resources to look at that list gcode that klipper can/can’t read? Thanks man.

4

Hello,

What does your start print macro look like?

Blake

5

Sorry for the late reply, i was away from my printer for a while.

After staring at it for longer than is probably healthy, all i can come up with is to replace the SET_HEATER_TEMPERATURE with M190. Do you thing that will change anything?

Here is the start code:

[gcode_macro START_PRINT]
# put the following in the Cura start code and remove everything else:
# start_print HOTEND_TEMP={material_print_temperature_layer_0} BED_TEMP={material_bed_temperature_layer_0}
gcode:
	{% set toolTemp = params.HOTEND_TEMP|int %}
	{% set bedTemp = params.BED_TEMP|int %}
	SET_GCODE_OFFSET Z=0
	{% if toolTemp >= 221 %}
		SET_GCODE_OFFSET Z=0.03
	{% endif %}
	SET_HEATER_TEMPERATURE HEATER=heater_bed TARGET={bedTemp}
	SET_HEATER_TEMPERATURE HEATER=extruder TARGET=150
	M82 								# absolute extrusion mode
	M220 S100 							# Reset Feedrate
	M221 S100 							# Reset Flowrate
	SET_VELOCITY_LIMIT VELOCITY=200 ACCEL=1000 ACCEL_TO_DECEL=500 SQUARE_CORNER_VELOCITY=5

	#home all axis and leave printhead in center of the bed for quick Z homing once the bed is 15 degrees below its target
	G28
	SET_HEATER_TEMPERATURE HEATER=extruder TARGET=150
	TEMPERATURE_WAIT SENSOR=heater_bed MINIMUM={bedTemp -15}	# wait for bed to be over 50
	TEMPERATURE_WAIT SENSOR=extruder MINIMUM=140
	SET_HEATER_TEMPERATURE HEATER=extruder TARGET=0
	G28	Z							# home all axes
	SET_HEATER_TEMPERATURE HEATER=extruder TARGET={toolTemp -70}

	#move to the side, wait untill the bed is within 10 deg from target heat the hotend
	G90
	G0 Z20
	G0 X0 Y0
	TEMPERATURE_WAIT SENSOR=heater_bed MINIMUM={bedTemp - 10}
	SET_HEATER_TEMPERATURE HEATER=extruder TARGET={toolTemp}
	TEMPERATURE_WAIT SENSOR=extruder MINIMUM={toolTemp - 1}	#start printing 1 deg before reaching setpoint

	# And we can now draw our purge line
	G92 E0 								#Reset Extruder
	G1 Z2.0 F3000 						#Move Z Axis up
	G1 X0 Y20 Z0.28						#Move to start position
	G1 X0 Y200.0 Z0.28 E15   			#Draw the first line
	G1 X0 Y200.0 Z0.28 					#Move to side a little
	G1 X0.5 Y20 Z0.28 E30 				#Draw the second line
	G92 E0 								#Reset Extruder
	G1 Z2.0 F3000 						#Move Z Axis up
6

@NewHandle

Please put all the code between code braces.

Format

The way you did it messes up the code, spaces are lost and it is of no use.

7

Done, although I think I found the issue. I had old custom gcode in cura, probably because I updated cura in the middle of my klipper foray and put the klipper start code into the old version of cura accidentally.

Update: that was exactly the problem, Cura was using old start gcode. thanks all for the help, especially the one that suggested keeping it simple

1 Like