@dc42 case closed!

@dc42 Got it, so in my setup, the fan would always be on. So I need to move these to GND and out1 pins.

Well, I'm an idiot...

I was using this picture as a reference from your blog:

But then I just realized, there are two pictures in the guide...

Hello Duet,

I have a ToolChanger with 4x 1LCs and am having issues controlling out1 on two separate tools. After discovering the issue with the Hemera motors stalling BLDC fans, I assumed that was part of my problem.

I'm using 12v 2 pin fans, not using PWM control.

I'm still reviewing each tool, but I have found at least two completely dead fans, and two out1 headers that appear to be holding open 12V no matter what variation of M106 I send.

Tools B20 and B22 have 12V on the +VOUT pin of out1 constantly.

My config is posted here: https://github.com/aunixsystem/ToolChanger-Duet3-Configs/blob/main/sys/config.g

; Tool 0 heater
M308 S1 P"20.temp0" Y"thermistor" A"T0" T100000 B4725 C7.060000e-8 	; Set thermistor
M950 H1 C"20.out0" T1					; Extruder 0 heater
M143 H1 S300 							; Set temperature limit for heater 1 to 300C

; Tool 1 heater
M308 S2 P"21.temp0" Y"thermistor" A"T1" T100000 B4725 C7.060000e-8 	; Set thermistor
M950 H2 C"21.out0" T2
M143 H2 S300 							; Set temperature limit for heater 2 to 300C

; Tool 2 heater
M308 S3 P"22.temp0" Y"thermistor" A"T2" T100000 B4725 C7.060000e-8
M950 H3 C"22.out0" T3
M143 H3 S300 							; Set temperature limit for heater 3 to 300C

; Tool 3 heater
M308 S4 P"23.temp0" Y"thermistor" A"T3" T100000 B4725 C7.060000e-8
M950 H4 C"23.out0" T4
M143 H4 S300 							; Set temperature limit for heater 4 to 300C

; Fans
M950 F1 C"20.out2+out2.tach" 			; Tool 0 hot end fan with tacho
M950 F2 C"20.out1" 						; Tool 0 print cooling fan, no tacho
M950 F3 C"21.out2+out2.tach" 			; Tool 1 hot end fan with tacho
M950 F4 C"21.out1" 						; Tool 1 print cooling fan, no tacho
M950 F5 C"22.out2+out2.tach" 			; Tool 2 hot end fan with tacho
M950 F6 C"22.out1" 						; Tool 2 print cooling fan, no tacho
M950 F7 C"23.out2+out2.tach" 			; Tool 3 hot end fan with tacho
M950 F8 C"23.out1" 						; Tool 3 print cooling fan, no tacho
M106 P1 S255 H1 T50 					; Tool 0 hot end
M106 P2 S0 B0.5							; Tool 0 PCF
M106 P3 S255 H2 T50 					; Tool 1 hot end
M106 P4 S0 B0.5							; Tool 1 PCF
M106 P5 S255 H3 T50 					; Tool 2 hot end
M106 P6 S0 B0.5							; Tool 2 PCF
M106 P7 S255 H4 T50 					; Tool 3 hot end
M106 P8 S0 B0.5							; Tool 3 PCF

It has changed a bit because of some errors, but the tool and fan code reflect what I'm currently running.

I'm running 3.5.0beta2 on a Duet 6HC V1.02.

I have no issues with out2 on any of the tools.