Question about fan control

Phaedrux

Does the fan work anywhere? Do any of the fans work? It's possible you've blown the fan fuse.

You've only got 1 fan defined in your config. and It's setting the Fan0 port as if it were the hotend fan.

It's recommended you connect the part cooling fan to Fan0, Hotend to Fan1, and maybe a case fan to Fan2.

Here's my config as an example.

M106 P0 S0 H-1 C"Part Cooling"      ; Set fan 0 (Part cooling blower) G-code controlled. Thermostatic control is turned off
M106 P1 F30000 S1 H1 T45 C"Hotend Fan"   ; Set fan 1 (Hotend fan) Thermostatic control. Turns on when hotend reaches 45c
M106 P2 F30000 L0.0 X0.05 B0.5 T45:70 H100:101:102 C"Duet Fans" ; monitors MCU temp and driver flags

jtroutt19

@phaedrux

Ok Yes I figured I would just let the hotend fan run whenever the power was on so i connected to always on. It spins just fine. Just cant get the part cooling fan to work

jtroutt19

@phaedrux

Ok so for the hell of it I hooked both the hotend and part cooling fan0 and fan1. Both dont work

I've checked all three fuses and they are ok

Phaedrux

Try again, but this time change your fan commands in config.g to look like this

M106 P0 S0.5 H-1
M106 P1 S0.5 H-1
M106 P2 S0.5 H-1

That should turn all 3 fan ports on at 50% for testing.

jtroutt19

That worked

jtroutt19

@jtroutt19 OK they are working with temp now. Not sure what I was doing wrong. I need to take a break seems like

Phaedrux

Ok, so if you plug the fans into the recommended ports and follow the fan config example I posted above you should be good to go.

Part cooling on Fan0, Hotend on Fan1
M106 P0 S0 H-1 C"Part Cooling"
M106 P1 S1 H1 T45 C"Hotend Fan"

jtroutt19

@phaedrux

Yip So the firmware config tool sets them up like this

M106 P1 S1 I0 F500 H1 T45

So exactly like you showed. I removed the "I" and the "F" and they started working like they should.

Thank you very much for you help.

jtroutt19

@phaedrux
One more thing right quick the Part cooling fan is not shutting off when temp drops below 45°c. Hotend fan does

Phaedrux

That's because the part cooling fan isn't thermostatically controlled. It's controlled by the slicer in the gcode, or manually with the slider in DWC.

jtroutt19

@Phaedrux

Ok I see it now. Right on thanks again