Process/Polarity Table; Changing Polarity - Miller Millermatic 190 Owner's Manual

5-7. Process/Polarity Table

Process
GMAW − Solid wire with shield-
ing gas
FCAW − Self-shielding wire −
no shielding gas

5-8. Changing Polarity

Tools Needed:
7/16 in.
DCEP
Electrode Positive
FOR SOLID WIRE
.
A complete Parts List is available on-line at www.MillerWelds.com
Polarity
DCEP − Reverse polarity
DCEN − Straight Polarity
.
Connection hardware must be tightened with proper tools. Do not
just hand tighten hardware. A loose electrical connection will
cause poor weld performance and excessive heating at the ter-
minal block. Output hardware is factory-tightened to 30 in lb (3.39
N·m). Do not overtighten hardware when changing polarity.
Cable Connections
Cable To Gun
Connect to positive (+) out-
put terminal
Connect to negative (−)
output terminal
DCEN
Electrode Negative
FOR FLUX CORE WIRE
Cable To Work
Connect to negative (−) output
terminal
Connect to positive (+) output
terminal
Always read and follow wire
manufacturer's recommended
polarity, and see Section 5-7.
Ref. 267 805-A / Ref. 267 825-A
OM-264761 Page 17