Always On Fan - Unsuccessful

tippmann32503

I've been rebuilding my printer and part of it includes upgrading my Duet 2 Wifi to RRF 3.4.5 and a Duex5. I've tried adding some fans which were originally on the Duet to the Duex as always on, but haven't been able to get them to work. I've confirmed the fans still work by plugging them into the always on pins on the Duet, so I'm thinking it may be a config issue? Below is my fan section of config which I thought was correct as well (fans in question are the ones plugged into duex.fan5), but evidently something is off...

; Fans
M106 P0 S0 I0 F500 H-1                             ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H1 T35                          ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P2 S1 I0 F500 H1 T35                          ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on
M950 F3 C"duex.fan5"				  
M106 P3 S1 H-1

Phaedrux

Have you tried any of the other headers on the Duex?

Maestro

@tippmann32503 You need to setup/create your fans first with M950, so based on this config only fan 3 exists.
Your first three M106 commands are incorrect under 3.x ; there are no "I" or "F" parameters anymore. See GCode dictionary for M106 setup.

Your last two lines look OK to me; get rid of those first M106s and I would think fan3 would work. I believe S<=1 will use 0-1 scale instead of 0-255 but if it still doesn't work maybe try S255 just to be sure?

tippmann32503

@Maestro thanks for the help, but still no go. Here's what I was running for reference. I also tried S1 and adding Q500 to no avail.

; Fans
;M106 P0 S0 I0 F500 H-1                             ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
;M106 P1 S1 I0 F500 H1 T35                          ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
;M106 P2 S1 I0 F500 H1 T35                          ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on
M950 F0 C"duex.fan5"				   ; SAV - Added to Duex 8/3/23
M106 P0 S255 H-1					   ; SAV - Added to Duex 8/3/23

tippmann32503

@Phaedrux I did try another header and changed the M950 in doing so, also unsuccessful.

Phaedrux

Can you post your full config.g? Also the results of sending M122 and M98 P"config.g" please.

deckingman

@tippmann32503 Also check the vfan header on the Duex5 and make sure that the jumper is in the correct position for your fan voltage.

tippmann32503

@deckingman It's always the dumbest things, isn't it...was missing the jumper. That solved it, thanks!