Milling motor control - Duet3/PWM Converter

[jay_s_uk]

@Nightowl thats where you'll be going wrong then as the header you're using is always on (i think). change numbers 3 and 4. it'll also probably explain why its always on at power up without that relay. i would just wire them to an out connector and switch your M950 accordingly.

[Nightowl]

@jay_s_uk
Forgive me, but aren't they 'just' the power supply to the converter? The switch operating the relay (to stop it the motor spinning) is on out7.

Also @dc42 posted earlier (I missed it, sorry) that I should connect PWM in -ve to GND (not 5V-Ext)

[jay_s_uk]

@Nightowl ah bugger, you're right. i looked at the diagram wrong

[Nightowl]

All sorted, thank you gentlemen!

It was in fact down to way the PWM converter was connected to the Duet board.

I'll amend my diagram and publish it here (and delete the earlier one!

[Nightowl]

Here's the updated connection diagram:

...and this is the code from the config.g file:

; Milling motor and relay configuration
M950 R0 C"vfd+out7" L4000:25000 Q1000	; enable router relay on out7
M563 P0 S"St George" R0 		; assign spindle 0 to tool 0 and name it St George
T0					; select tool 0
M5					; ensure motor is turned off

Note: I have used this relay to provide mains power to the milling motor, which is activated from Out7 in this case. I guess any Out could be used, but the code would need to be changed accordingly.

Many thanks to @dc42 and @jay_s_uk for helping me resolve this, and I hope this diagram will be of use to others.