RC Servo control from Duet 2 Expansion header.

JustinCase

Good afternoon,

I'm having some difficulty controlling a RC Servo from my Duet 2 expansion header.

Setup:
Duet 2
Firmware 2.05.1
Ethernet

In my config I disable heater pin for with the M307 H4 A-1 C-1 D-1 command.

The servo I'm using is a Hitec HS-322HD. I'm using an external power supply for the servo and I've connected the signal to pin 13 on the expansion header labelled 'Heater 4'.

When I send a M280 P4 I1 S90 command the servo only makes a small movement in a clockwise direction. I can keep sending the command and the servo will only make a small movement every time, it also has no holding power once the move is done the servo can be turned by hand without resistance.

Any help would be appreciated.

Regards,

Andre

Veti

@JustinCase

do you have a config overwrite?

that might reenable the heater.

JustinCase

@Veti I've checked and I don't. I type M307 H4 into my Console and it returns 'Heater 4 is disabled'

JustinCase

Turns out when I use Heater Pin 6 and Pin 7 it works. Not sure why Heater Pin 4 was not co-operating.

Cheers