Controlling general purpose solenoids

[jwilo]

I need to control a simple low current solenoid on/off, without PWM control with a Duet 3 Mini 5+.

I have connected it to OUT_5, and configured OUT_5 using

M950 P5 C"solenoid"

And attempted to switch it on/off using

M42 P5 S1

and

M42 P5 S0

But the solenoid does not energise. I can confirm 24V (my VIN voltage) is present on OUT5+, and that the solenoid works when powered with 24V on the bench, so it must just be something to do with my configuration.

Hope somebody can help, many thanks.

[dc42]

@jwilo I think he meant:

M950 P5 C"out5"

[droftarts]

@jwilo said in Controlling general purpose solenoids:

M950 P5 C"solenoid"

'solenoid' isn't a valid pin name.

Try M950 P5 C"solenoid".

Try M950 P5 C"out5".
See https://docs.duet3d.com/User_manual/Reference/Gcodes#m950-create-heater-fan-spindle-or-gpioservo-pin

Ian

[jwilo]

@droftarts Thanks Ian, not sure I understand your reply. The bit I don't understand, if "solenoid" is not a valid pin name, why does your example use it too?

I've read the docs for M950, but must not be wrapping my head around it.

[dc42]

@jwilo I think he meant:

M950 P5 C"out5"

[jwilo]

@dc42 Perfect! Thank you, that's the key I was missing. I thought the P value referred to which output you're using, and the name was a name you wanted to assign to the pin.

I see now that P refers to the output you're creating, i.e. P1 is some solenoid, P2 might be a light etc, and the name is the name of the pin you want to map it to, great - all working now, thanks!

[droftarts]

@jwilo said in Controlling general purpose solenoids:

if "solenoid" is not a valid pin name, why does your example use it too?

Sorry! Copy/paste failure on my phone!

Ian

[jwilo]

@droftarts No problem, thank you!