Any way to group multiple fans to single M106?

Notepad

Im trying to set up a bank of auxiliary part cooling fans to be controllable via slicer output.
Most slicers appear to only have a single M106 command dedicated to Aux part cooling.

For Orca slicer in particular it is M106 P2 for Auxiliary fans and M106 P3 for chamber exhaust fans.

I currently have 4x Tacho enabled 4 wire aux fans

;Chamber Fans
M950 F4 C"!out4+out4.tach"                                              ;Chamber 12032 fans connected to 4 wire on mainboard
M950 F5 C"!out5+out5.tach"
M950 F6 C"!out6+out6.tach"
M950 F7 C"!out7+io7.in"                                                 ;Chamber 12032 fans connected to 2 wire output and io7 as input for tach on mainboard

Any ideas if this is possible?

From what I currently can see with the M106 inputs, a single Pnnn is used relating to the fan of the same number.
It would be nice to have a new optional input say Fnn:nn:nn where if the "F" is present, then it maps thsoe fans to a single fan tool.
This would also have the added affect of getting rid of lots of individual fan controls on DWC and instead having a single control for those grouped fans.

If this was done, then it could look something like this
M106 P2 F4:5:6:7 S0 B0.5 C"Auxiliary Fans"

dc42

@Notepad please log a feature request for these on Github Issues.

If it wasn't for the tachos you could just connect all 4 fans in parallel. As you would have 4 tachos on a single logical fan, how would you want to display the RPMs?

Notepad

@dc42

please log a feature request for these on Github Issues.

Understood! Ill get on that later today.

I'm mostly using the tacho output as a method of error checking and its going to be the start of a process of per print documentation for part validation. It is quite nice to see the tacho output in the DWC and great at determining overall airflow from its output, but, its not actually that important for end customers to see, other than it looking quite cool.

The main reason for the 4 wire 12032 fans is actually for the quality of the fans outshines that of the standard 2 wire fans. The ones I have on hand even have stall detection and speed/load control which are noticeably quieter and start up smother with less of an amperage spike from a partially stalled stator when the initial power up cycle begins.