I asked Bob Campbell, and he referred the question to james cullins, and james answered
"The THC 300 has a relay for firing the torch. You can use Bob's breakout board and the THC 300 that is all you need. Check out my web page
www.soundlogicus.com You can download the manual, install program and other useful files."
I may use the thc300, but want to try it without first to see if I am happy without it.
the cutmaster 51 does measure 10.85 volts across the two torch trigger terminals. It draws .02 amps on activation, when torch is arcing, it switches to -.05 on the multimeter.
Is there a way of testing how much current is ok on the bob ouput for the relay?
I have a relay sitting infront of me, and when tested, it pulls .16 or 160 milliamps. Is this way to much for the BOB output you think? It clicks, so it is not solid state, I am just having a hard time locating a proper solid state relay. In the THC300 manual, it says that when testing, you will hear the relay click, so it is not solid state, why is it ok for them to use, but not me, im confused?
Edit: Something like this may be the ticket...
http://www.mouser.com/Search/Product...BP7tkZuA%3d%3d
The TS3R1G or TS3R2G as shown on the data sheet seem good.