Mini Hotend fan turns off once part fan is turned on

gallaghersart

Some weird fans stuff.

Hotend fan turns on and off related to correct temp settings.
Hotend fan turns off once part fan is turned on. regardless of hotend temp.
From manual control with hotend fan working if I change fan speed to 100% the hotend fan stops, and part fan spins. If I lower the fan speed to 60% both fans spin. I can raise it up to 80%, any higher then hotend fan stops and I have to go back to 60% to get both spinning again.

gcode on 2nd layer m106 S255, part fan spins, hotend fan stops

below is my code from config
thanks
`mike


; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B3950 A"BED" ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0                           ; create bed heater output on out0 and map it to sensor 0
M307 H0 B0 R0.689 C611.8 D6.50 S1.00 V24.2                           ; 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" R2200 A"HOTEND"           ; configure sensor 1 as PT1000 on pin temp1
M950 H1 C"out1" T1                           ; create nozzle heater output on out1 and map it to sensor 1
M307 H1 B0 R2.960 C214.9 D8.99 S1.00 V24.2                            ; 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"out3" Q255                         ; create fan 0 on pin out3 and set its frequency
M106 P0 S0 H-1 C"Part Fan"                             ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out4" Q255                         ; create fan 1 on pin out4 and set its frequency
M106 P1 H1 T40 C"Hotend Fan"                             ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"out5" Q255                         ; Case fan
M106 P2 S255 C"Case Fan"

chrishamm

@gallaghersart Please share the line starting with M563 from your config.g as well. Perhaps you have both fans mapped to the heater, so M106 attempts to control both of them.

gallaghersart

@chrishamm
Thanks, re-reading M563 again, below is current config. If I figure it out I'll post right back.

M563 P0 D0 H1 F0
G10 P0 X0 Y0 Z0
G10 P0 R0 S0

Should ?
M106 P0 S0 H-1 C"Part Fan"

be
M106 F0 S0 H-1 C"Part Fan" or M106 F0 S0 H1 C"Part Fan"

Thanks

gallaghersart

Think I fixed it, same original config codes. I just bumped the NEW part fan wire and the fan stopped. so I took it off.. both solders had excess wire that were in contact.

re-soldered and installed all worked now, and both fans will run when I change the part fan speed no matter the speed.

Glad the Duet Mini board did not get fried ....

thanks

T3P3Tony

@gallaghersart glad its fixed. once you are happy then please mark the topic as solved

gallaghersart

@t3p3tony how do I "mark the topic as solved"?

T3P3Tony

@gallaghersart I have done it, you first mark as question, then as solved.