Work Cable Routing Inside Unit; Process/Polarity Table; Changing Polarity - Miller Millermatic 140 Auto-Set Owner's Manual

4-3. Work Cable Routing Inside Unit

4-4. Process/Polarity Table

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

4-5. Changing Polarity

Electrode POSITIVE Electrode Positive
FOR SOLID WIRE FOR SOLID WIRE
W orkClamp W orkClamp
L ead L ead
1
.
A complete Parts List is available on-line at www.MillerWelds.com
2
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 terminal block.
C H A N G IN G P O L A R IT Y C H A N G IN G P O L A R IT Y
DCEP DCEP
Electrode Negative Electrode Negative
W ire Drive W ire Drive
L ead L ead
1
Cable To Gun
Connect to positive (+) out-
put terminal
Connect to negative (−)
output terminal
DCEN DCEN
Flux Core Wire Flux Core Wire
W orkClamp W orkClamp
L ead L ead
W ire Drive W ire Drive
L ead L ead
1 Work Cable
2 Output Terminal Block
Insert work cable through opening
in front panel and route along back
of front panel to output terminal
block.
Close door.
Cable Connections
Cable To Work
Connect to negative (−) output
terminal
Connect to positive (+) output
terminal
1 Lead Connections For Direct
Current Electrode Positive
(DCEP)
2 Lead Connections For Direct
Current Electrode Negative
(DCEN)
Always read and follow wire
manufacturer's recommended
polarity, and see Section 4-4.
Close door.
2
Ref. 203 501 / Ref. 802 982-
OM-225 311 Page 15
Ref. 802 982-A