Cannot get Hot End Fan to Work

[alexanderhendrickson]

I've got almost all my configuration done, but for the life of me I cannot get my hot end fan to work. I have the part cooling fan mapped to OUT8 and the hot end fan to OUT7 on a 6HC. I also have a 3HC attached as well, but those fans are obviously on the 6HC.

The fan works - if I set it up as the part cooling fan, it will turn on when commanded. Both OUT7 and OUT8 work. But when it's set up to be a hot end cooling fan it just will not work. It never turns on when it heats up, and I am completely stumped.

; Configuration file for Duet 3 MB 6HC (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.13 on Sun Oct 16 2022 17:13:48 GMT-0500 (CDT)

; General preferences
G90                                     ; send absolute coordinates...
M83                                     ; ...but relative extruder moves
M550 P"zanderCROSS"                     ; set printer name

; Wait a moment for the CAN expansion boards to start
G4 S2

; Network
M552 P0.0.0.0 S1                        ; enable network and acquire dynamic address via DHCP
M586 P0 S1                              ; enable HTTP
M586 P1 S0                              ; disable FTP
M586 P2 S0                              ; disable Telnet

; Drives
M569 P0.0 S1                            ; X0 physical drive 0.0 goes forwards
M569 P0.1 S0                            ; Y0 physical drive 0.1 goes backwards
M569 P0.2 S0							; X1 physical drive 0.2 goes backwards
M569 P0.3 S1							; Y1 physical drive 0.3 goes forwards
M569 P0.4 S1							; extruder motor
M569 P1.0 S1							; front left Z motor
M569 P1.1 S1							; rear Z motor
M569 P1.2 S1							; front right Z motor
M584 X0.0:0.2 Y0.1:0.3 Z1.0:1.1:1.2 E0.4  ; set drive mapping
M671 X-10:200:410 Y-10:410:-10 S10		; leadscrews are at (-10,-10), (200,410), (410,-10)
;M671 X-44:200:444 Y-10:444:-10 S0.5	; leadscrews are at (-44,-10), (200,444), (444,-10)
M350 X16 Y16 Z16 E16 I1                 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z1600.00 E420.00		; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00     ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z500.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00     ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E300 I20            ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1                        ; set axis minima
M208 X400 Y400 Z400 S0                  ; set axis maxima

; Endstops
M574 X1 S1 P"io0.in+io2.in"  			; configure active high endstop switch for low end on X
M574 Y1 S1 P"io1.in+io3.in"  			; configure active high endstop switch for low end on Y

; Z-Probe
M950 S0 C"io7.out" 						; servo/gpio 0 is io7.out pin
M558 P9 C"io7.in" H5 F1000:100 T6000 A5 S0.05	; enable Z probe and set dive height, probe speed and travel speed
G31 P25 X51 Y14 Z2
M557 X60:340 Y60:340 S70                ; define mesh grid

; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B3950 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0 Q10                       ; create bed heater output on out0 and map it to sensor 0
M307 H0 B0 S1.00                             ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                      ; map heated bed to heater 0
M143 H0 S120                                 ; set temperature limit for heater 0 to 120C
M308 S1 P"temp1" Y"pt1000" 		; configure sensor 1 as pt1000 on pin temp1 for hotend
M950 H1 C"out1" T1                           ; create nozzle heater output on out1 and map it to sensor 1
M307 H1 B0 S1.00                             ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S280                                 ; set temperature limit for heater 1 to 280C

; Fans
M950 F0 C"0.out8" Q250                       ; create fan 0 on pin out8 and set its frequency
M106 P0 S0 H-1  
M950 F1 C"0.out7” Q250			 ; create fan 1 on pin out7 and set its frequency
M106 P1 T40:50 H1				  ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 F0                           ; define tool 0
G10 P0 X0 Y0 Z0                         ; set tool 0 axis offsets
G10 P0 R0 S0                            ; set initial tool 0 active and standby temperatures to 0C

[moth4017]

@alexanderhendrickson said in Cannot get Hot End Fan to Work:

; FansM950 F0 C"0.out8" Q250 ; create fan 0 on pin out8 and set its frequencyM106 P0 S0 H-1 M950 F1 C"0.out7” Q250 ; create fan 1 on pin out7 and set its frequencyM106 P1 T40:50 H1

not too familiar with the hc6 but should they be like this?
; Fans
M950 F0 C"out8" Q250 ; create fan 0 on pin out8 and set its frequency
M106 P0 S0 H-1
M950 F1 C"out7” Q250 ; create fan 1 on pin out7 and set its frequency
M106 P1 T40:50 H1

[Phaedrux]

@moth4017 The 0 is implied if it's left off, so 0.out8 would be correct, but optional.

@alexanderhendrickson Can you please send M122 and M98 P"config.g" in the gcode console and copy paste the results here?

How do you have the Low Current Output Voltage selection jumper set for Out7-9?

Are you able to control the fan if you send M106 P1 H-1 S1? That should make it turn on at 100%.