RTFM? What? What the hell is wrong with you LOL.

how does a topic get marked as solved?

sigh... its right in the help page that way too:

Fnnn Fan(s) to map fan 0 to (RepRapFirmware 1.16 and later)

Can you also post your tool definition e.g. M563

; Tools (0 hotend/extruder)
M563 P0 D0 H1 F1                               ; define tool 0 (P) uses extruder 0 (D), fan 1 (F), and heater 1 (H) (hot-end)
G10 P0 X0 Y0 Z0                                ; set tool 0 axis offsets
G10 P0 R0 S0                                   ; set initial tool 0 active and standby temperatures to 0C
M570 S600		              	    	       ; Increase to allow extra heating time if needed
M104 B285				                       ; set max temp for extruder hotend
M200 D1.75 				                       ; set all extruder filament diameters to 1.75mm
M592 D0 A0.015 B0.0012 L0.2	    			   ; non-linear extrusion (D)rive 0, (A) coefficient, (B) coefficient, (L)imit - default 0.2, (T)temp - future use```

summary:
having an issue with part cooling setup on prusa w/duet 2 running latest dwc/rrf.

problem:
as the item prints, I can see the "Tool Fan" slider increase in dwc (even though that fan is thermostatically controlled to on >50C) over the various layers (because of the cura config). I need the "part" fan to be the one cura controls. I can't figure out if my problem is cura not sending P with the M106 or if the latest version of duet fw/dwc is broken.

gcode output:
In the gcode that is being printed, the M106 lines in the code shows as M106 Snnn.n starting at 11.1 at layer 1 and working it's way to 255 at layer 23. This aligns with the cura config in the profile.. but why doesn't it have the fan # set in the M106 command (M106 P0 Snnn.n)?

hardware:
on the physical duet 2 lan board i have the part cooling fan (pwm) setup split between always on (+/-) and pwm on fan 0. the extruder fan is on fan 1.

I know the hw setup is correct because in dwc i can slide the slider and it adjusts the fan speed perfectly. the extruder fan comes on > 50C as expected.

setup - cura:
in cura, machine settings, extruder 1 (only extruder), Cooling Fan Number is set to 0.

setup - duet :

; fan 0 (part pwm fan)
M950 F0 C"!fan0" Q25000
M106 P0 S0 L0.2 X1.0 B1 I1 H-1 R1 C"part"

; fan 1 (hotend)
M950 F1 C"fan1" Q25000 (default freq for 2-pin fans)
M106 P1 S1.0 L0.0 X1.0 T50 H1 R1 C"extruder"

RTFM? What? What the hell is wrong with you LOL.

@droftarts
Duet Web Control 3.2.0-beta1+2
Board: Duet 2 WiFi (2WiFi)
Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 3.2-beta1 (2020-09-15b1)
Duet WiFi Server Version: 1.23

I'm assuming it's this?
https://duet3d.dozuki.com/Wiki/Duet_2_Maestro_12864_display_menu_system

I don't have a Maestro...

What is a "Menu File" under the "Menu Directory" in File Management? Was that there before? I don't remember seeing it.

installed

should the visualizer work when simulating a print? nothing shows up.