I have a syncrowave 250, and I just bought a WC-115a control box for a spoolmatic 30a gun. I set the machine up according to the WC book, and I cant get it to weld a bead. I am getting arc from the gun, but it wont stay steady. I checked all connections and consumables cleaned the **** outof the aluminum and still no stable arc. This is how I have it connected : 
+ from welder to WC115 control box
- from welder to work piece
Argon & regulator directly to the spool gun
3 prong 115v plug for WC control plugged into grounded plug recepticle
I see a second setup that provides 115v power through the 14-pin plug and use of a voltage sensing clamp. I have used another WC-115 and spoolgun on my machine that used the 14-pin setup and it worked fine. So my question is does this sound like the way I should wire my WC box, or am I overlooking something on my initial setup?
According to the manual and a Miller Tech, the 14-pin plug only provides power in lieu of the normal 115v 3 prong plug. Any help would be appreciated greatly!
Confused Coastie

+ from welder to WC115 control box
- from welder to work piece
Argon & regulator directly to the spool gun
3 prong 115v plug for WC control plugged into grounded plug recepticle
I see a second setup that provides 115v power through the 14-pin plug and use of a voltage sensing clamp. I have used another WC-115 and spoolgun on my machine that used the 14-pin setup and it worked fine. So my question is does this sound like the way I should wire my WC box, or am I overlooking something on my initial setup?

According to the manual and a Miller Tech, the 14-pin plug only provides power in lieu of the normal 115v 3 prong plug. Any help would be appreciated greatly!
Confused Coastie
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