controling 2 SSR to control on/off clamps

martin7404

HI
I am building a custom machine with duet wifi 2 axis and 2 sets of pneumatic clamps. The valves that I have 220 V coils, so I will use SSRs.
Can I use heater outputs on duet wifi:

M307 H0 A-1 C-1 D-1                     ; disable heater on PWM channel for BLTouch - 1 elektromagnit
M307 H1 A-1 C-1 D-1                     ; disable heater on PWM channel for BLTouch - 1 elektromagnit

and then
M42 P0 s1 to switch on and M42 P0 S0 to switch off
this is RRF 2

o_lampe

@martin7404
Did you read the infos about RRF2 I/O pin allocation on Duet2? It might not be neccessary to use heater pins, unless your SSRs need such HV signal level.

I'm not sure about M42 P0 S1 . It could be seen as 1 from 255 PWM levels, which is very low.
Better use M42 P0 S1.0 to make sure it is read as floating value between 0.0 and 1.0 (or use S255 to switch on)

martin7404

@o_lampe heaters are just easy as far it is on screw terminals
This is not 3d printer just automated drill pres to make series of holes on 6 m alu profile
Thanks for 0 and 255
It will be more prone to errors this way