Newbie-> Using G Code to turn a relay on

[Delanoman]

I have a relay BOB that i bought off of ebay. i wanna use this board to turn my plasma torch on and off. So far I have enabled 1 output under pin 17 (the pin which controls this relay). How do i get mach3 to know that this pin should be controlled every time my G-code tells it plasma on/ off. I made my G-code using lazycam.... If anyone can help me out thanks!

[fizzissist]

Why not just use the M7/M9 (spray mist on/off) function? Most machines will have a regular 110V outlet powered by the command, which could be used to power a relay.

An OPTO22 solid state relay is great for 5V signals, btw, and they're cheap.

[H.O]

It depends on which M-code you want to use to operate the relay. M3 sounds like a good option since that is spindle ON (CW) normally.

Got to Config->Ports & Pins, Spindle Setup tab. Upper left corner, uncheck the Disable Spindle relays checkbox and set the Clockwise (M3) Output # to 1 - done.

Now M3 will turn on the relay and M5 will turn it off.

/Henrik.

[Delanoman]

Yeah i made sure the the spindle wasn't disabled. As for using different commands aside from M3 and M5 i have yet to try. here is a link to the relay board i bought off of ebay. http://cgi.ebay.com/CNC-PLASMA-ROUTE...4.c0.m14.l1262

[srmurugavel]

May i know what for code G64 is been used?