Hotend heater "off"

Exerqtor

I've suddenly gotten the problem that my hotend heater goes to "off" and then the printer won't run a toolchange because the temp is to low. Which of course it is since it the heater has turned "off". Is it possible to downright disable the "off" state and just have "active" and "standby"?

I can't for the life of me get the machine to heat at all.

For reference i'm running RRF 3.2-beta4.1.

Phaedrux

Can you post your tool change files and sequence of macros?

Exerqtor

Sure, they have been working flawlessly since before i updated to 3.2. b4.1 (was running b4) befor that.

; tfree0.g
; Called when tool 0 is freed
; Tuned for a Mosquito hotend with MM adapter
;
; Rectraction
M98 P"CurrentsPrint.g"   ; Call Macro/Subprogram
;
; Unload hotend
M83                      ; Set extruder to relative mode
G1 E-5.00 F2000          ; Rapid retract
G4 P100.00               ; Cooling period
G1 E-20.00 F1500         ; Long retract (30mm på 3-1 adapter)
G1 E-25.00 F1500         ; Move to cooling moves location
;
; Cooling moves
G1 E5.00 F1000           ; Extrude 5mm filament
G1 E-5.00 F1000          ; Retract 5mm filament
G1 E5.00 F1600           ; Extrude 5mm filament
G1 E-5.00 F2000          ; Retract 5mm filament
G1 E5.00 F2000           ; Extrude 5mm filament
G1 E-5.00 F2000          ; Retract 5mm filament
G1 E5.00 F2000           ; Extrude 5mm filament
G1 E-5.00 F2000          ; Retract 5mm filament
M98 P"CurrentsNormal.g"  ; Call Macro/Subprogram
;
;Unload filament
M702                     ; Unload the previously loaded filament
;
; Turn off filament monitor
M591 D0 P1 C"e0stop" S0  ; Extruder 0 filament sensor: disabled

; tpost0.g
; Called after tool 0 has been selected
; Tuned for a Mosquito hotend with MM adapter
;
; Wait For Print Temperature
M116 P0                  ; Waits for temperatures associated with tool 0 to arrive at their set values
;
; Turn on filament monitor
M591 D0 P1 C"e0stop" S1  ; Extruder 0 filament sensor: enabled
;
; Set firmware retraction paramaters
M98 P"FWretraction.g"     ; Call Macro/Subprogram
;
; Load filament
M98 P"CurrentsPrint.g"   ; Call Macro/Subprogram
G1 E9.00 F1500           ; Prime, part 1
G1 E37.00 F3000          ; Prime, part 2 (47mm på 3-1 adapter)
G1 E4.00 F1500           ; Prime, part 3
;
; Unretract filament
G11                      ; Unretract

; tpre0.g
; Called before tool 0 is selected

My start gcode looks like this (snapped up from the print that i just tried to run):

;TYPE:Custom
; custom gcode: start_gcode
; Start G-code: START
M98 P"PrintStart.g" ; Call Macro/Subprogram
M140 S70 ; Set first layer bed temperature
M116 H0 S20 ; Waits for the bed to reach its temperature +-20 degC
G0 X0 Y0 Z0.3 ; Move X/Y0 & Z0.3
G10 P0 R275 S275    ; Set active and standby Purge line temps for T0
M116 P0 ; Waits for T0 to reach its temperature
T0 ; Select T0
M98 P"PrintPurge.g" ; Call Macro/Subprogram
G10 P0 R270 S270    ; Set active and standby first layer temps for T0
M116 P0 ; Waits for T0 to reach its temperature
; Start G-code: END
; custom gcode end: start_gcode
G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
; custom gcode: start_filament_gcode
; Filament specific start G-code: START
M701 S"CPE" ; Load filament for the active tool
M703 ; Load filament config.g fof the selected filament
; Filament specific start G-code: END
; custom gcode end: start_filament_gcode
;LAYER_CHANGE
;Z:0.2
;HEIGHT:0.2
; custom gcode: before_layer_gcode
; Before layer change G-code: START
G92 E0.0 ; Zero the extruded length
; Layer number 0 
; Before layer change Z-height was 0mm
; Before layer change G-code: END
; custom gcode end: before_layer_gcode

The macros look like:

; PrintStart.g
; Called when starting a print
; Used to configure print parameters
;
G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
G28 X Y ; Home X & Y axis
G28 Z ; Home Z axis
M561 ; Clear any bed transform that might be in place  
G29 S1 ; Load & turn on bed height map
M593 F43 ; Cancel ringing at 43Hz
M376 H5 ; Set bed compensation taper to 5mm
M204 P400 T3000 ; Set printing and travel accelerations (mm/s²)
M98 P"CurrentsPrint.g" ; Call Macro/Subprogram

; PrintPurge.g
; Called when starting a print
; Used to purge the nozzle
;
G92 E0.0 ; Zero the extruded length
G0 Z0.3 ; Lift bed to nozzle -0.3mm
G1 X164 E50 F400 ; Extrude 50mm of filament in a 164mm long line
G92 E0.0 ; Zero the extruded length
G10 ; Retract
G1 X160 F4000 ; Quickly wipe away from the filament line

; FWretraction.g
; Called when "M98 P"FWretracton.g"" is sent 
; Used to set default firmware retraction length, extra un-retract lenght, retract speed, unretract speed & zlift 
;
M207 S3.000 R0 F3600 T3600 Z0.100 ; Set firmware retraction length, extra un-retract lenght, retract speed, unretract speed & zlift

; CurrentsPrint.g
; Called when printing*
; Used to set motor currents for printing
;
M913 X85 Y85 Z85 E85	 ; Set X Y Z E motors to x% of their max current

And my end code looks like:

;TYPE:Custom
; custom gcode: end_filament_gcode
; Filament specific end G-code: START
; Filament specific end G-code: END 
; custom gcode end: end_filament_gcode
; custom gcode: end_filament_gcode
; Filament specific end G-code: START
; Filament specific end G-code: END 
; custom gcode end: end_filament_gcode
; custom gcode: end_filament_gcode
; Filament specific end G-code: START
; Filament specific end G-code: END 
; custom gcode end: end_filament_gcode
; custom gcode: end_gcode
; End G-code: START
M98 P"PrintEnd.g" ; Call Macro/Subprogram
; End G-code: END

; PrintEnd.g
; Called when ending a print
; Used to configure printer does after a print is ended
;
M140 S0 ; Turn off heatedbed
G91 ; Relative positioning
G1 Z5.000 F3000 ; Lower bed 5mm
T-1 ; Deselect all tools and set them on standby
G10 P0 R0 S0 ; Set active and standby temps for T0 to 0 degC
G10 P1 R0 S0 ; Set active and standby temps for T1 to 0 degC
;G10 P2 R0 S0 ; Set active and standby temps for T2 to 0 degC
G90 ; Absolute positioning
G1 X1 Y1 ; Move to X1 and Y1
G91 ; Relative positioning
G0 H1 X-500 Y-500 ; Move to X/Y endstops
M107; Turn off the print cooling fan
G90 ; Absolute positioning
M98 P"CurrentsNormal.g" ; Call Macro/Subprogram
M84 ; disable steppers

dc42

When the problem happens, does the heater show the status as "fault" in DWC?

Exerqtor

@dc42 When it happens i've tried to "re-activate" the tool, and because it don't achieve the temp as fast as the firmware except it to according to the tunned heater profile it throws an error.

If i've reset the heater fault and tried again it dosn't help. I have been forced to power toggle the printer to get back on to it.

I've gone thru my macros etc. many times now and i can't for the life of me see a reason for it to happen.

What makes it even harder is that the problem is intermittent ‍️

Exerqtor

I'm about to do some max flow tuning on some filaments now. So i want to turn on the hotend to the designed temp, it's currently in "off" state after the last print job.

Shouldn't it be enough for me to send the following gcodes in the console to make it heat up the hotend?

G10 P0 R235 S235
M116 P0

Because if that's the case something is fubar, because other than deploying the active and standby temps nothing happens.

Something fundemental i'm missing?

Phaedrux

I believe you'd need to send a T command to activate the tool you want.

Exerqtor

Looks like this was a hardware issue after all, the crimp inside the hotend heater connector had gone bad so it was loosing conntact sporadicly.

Redid the crimps and no error's or issues so far