Thank you so much, I'll try with the expansion connector.

Thank you for the reply, but i'm not shure I understood.

The esc pwm imput must be connected to the negative of the fan and at the same time should be connected to the positive of the same fan with a resistor.

Did i misunderstood?

Hello,

I'm trying to build a 3dprinter/cnc machine with the Duet wifi but i can't manage to control the spindle.

The cnc spindle is made by an esc and an rc motor, i tested the esc with a servo tester and it is fully working but when i connect it to the fan header i get no movement.

Here's what i did:

Connect the esc using only signal and ground wires to the fan2 pin

Disabled the pwm fan 2
M106 P2 I-1

Load a new tool
M563 P2 S"Spindle"

Set the board to CNC mode using pwm fan 2 as servo output
M453 P22 R15000

Using M3 or M280 command doesn't produce any movement in the motor.

The esc is a skywalker 80A UBEC and it works with 5v signals, the fan jumpers are set to internal 5v.

Am i doing anything wrong?

Can PWM fans output 5v PWM signal?