when should i use each with stick on mild steel ?
is it thin sheet DCRP and heavey plate DCSP ?
why do i want heat in the rod with DCRP ? is this for shielding purposes ?
Something that helped me remember is the + and - thing. Positive + (more) means more penetration. - (less) Negative means less penetration. Second thing ......... Straight Stinger Negative ........ I think of SSN (social security number) ........... Straight Stinger Negative to keep the confusion of +, -, straight, and reverse straight in my mind. DCSP (DC Straight Polarity) = Straight Stinger Negative, and the REVERSE (DC Reverse Polarity) is the other one (positive).
In a positive electrode, the arc goes away + from you, digging into the metal. In a negative electrode, the arc comes toward - you, melting the rod. In thick stuff, you want to melt the thick stuff. On thin stuff, you want the rod to melt.
The thicker (think +) the material, the more likely you will use stinger positive +.
The thinner (think -) the material, the more likely to use a negative - stinger.
This is only a general rule, and not absolute. But it helped me to get the jumble of "polarity" straightened out in MY mind until it became more familiar to me.