4 pulses/rotation tacho output Fan RPM

[Kanyo]

Hey there.
I'm using this 5vfan for my hot end fans
I noticed that the fan was reading strangely high, so I checked the datasheet one more time and discovered that it was spec'd for 4 pulses/rotation.
I remember that normal fans are 2 pulses/rotation, so it makes sense that a 7000 rpm fan is always showing more than 13000 rpm on the DWC.

Here are the settings for this fan in config.g
M950 F1 C "fan1+^exp.pb6" Q500
M106 P1 C "ColdEndFan" S1 H1 T45

The connection is to PB6 via 1N4148 as @dc42 has explained many times in previous threads.

Is there any way to change the pulse per revolution setting?

[Kanyo]

Oh, I forgot to mention...
The board is Duet2 Ethernetv1.04, running RRF3.2.2 and DWC3.2.2.
The fan is of course powered by an external 5v supply.

[dc42]

@Kanyo it's been a long while, however the new K parameter in the M950 command used to create a fan will solve this.