TimothyMoulder
Member
A little OT, but since PLCs are used on welding machines, not too far off...
We have a dual-head machine that uses plasma arc welders for fusion welding. We are replacing one of these with a TIG welder to handle some more delicate parts and reduce the cost of ownership over the plasma.
My concern - brought to me yesterday by one of the maintenance guys, since I know next to nothing about welding - is that the plasma torch uses a negative ground, and the TIG welder uses a positive ground.
Now, in my experience, when you connect positive to negative, bad things can happen. The maintenance guy says, and I quote, "Yeah, it's called 'welding'".
With all due respect to my good friend of 18 years, I don't want a short-circuit to fry $20k worth of welding equipment, so I thought I'd seek some additional opinions on the wisdom of this.
By the way, the chucks on both welders are separated by 14k ohms of resistance. No idea if that's enough.
Thanks in advance,
TM
We have a dual-head machine that uses plasma arc welders for fusion welding. We are replacing one of these with a TIG welder to handle some more delicate parts and reduce the cost of ownership over the plasma.
My concern - brought to me yesterday by one of the maintenance guys, since I know next to nothing about welding - is that the plasma torch uses a negative ground, and the TIG welder uses a positive ground.
Now, in my experience, when you connect positive to negative, bad things can happen. The maintenance guy says, and I quote, "Yeah, it's called 'welding'".
With all due respect to my good friend of 18 years, I don't want a short-circuit to fry $20k worth of welding equipment, so I thought I'd seek some additional opinions on the wisdom of this.
By the way, the chucks on both welders are separated by 14k ohms of resistance. No idea if that's enough.
Thanks in advance,
TM