I have looked around through the posts, and although I expect that this has been covered before, I cannot find anything on it. I am still doing some of the final touches on my build, and I just hooked up the router. I am driving a set if relays with Pin 14.
Pin 14 tied directly to a solid state relay (Magnecraft 861 style). 3-32VDC Control, 24-280VAC load.
That relay is tied to a pair of contactors (1 for the 12amp router, the other to be used for a dust collector). That relay is a 120VAC control, 120VAC SPST electromechanical relay.
Everything appears to work fine when the system is booting and when Mach3 is loaded. The relay stays off - just like it is supposed to. When I request the router to activate using gcode, the led on the SSR turns on, the electromechanical relay turns on, and the router turns on. When I request the router to turn off, everything turns off.
HOWEVER, when I shutdown Mach3, the relays fire momentarily. Long enough to visually see the LED turn on, and hear the electromechanical relays fire. In total, it is less than a second - but they definitely fire.
I do not know if this is an issue, but I am using the Smooth Stepper board.
Help.