Miller And M-25 Gun Manuale d'uso - Pagina 16
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2-8. Setting Gun Polarity For Wire Type
Wire Drive
Assembly Lead
+
Shown as shipped – Electrode Positive (DCEP): For
solid steel, stainless steel, aluminum, or flux core with
gas wires (GMAW).
Electrode Negative (DCEN): Reverse lead connections
at terminals from that shown above for gasless flux core
wires (FCAW). Drive assembly becomes negative.
2-9. Installing Gas Supply
6
OM-1320 Page 12
Changing Polarity
D
-
Positive Terminal
4
OR
7
5
Tools Needed:
Work Clamp Lead
D
Negative Terminal
1
2
3
Argon Gas
8
9
CO
Gas
2
1-1/8, 5/8 in
1
Polarity Changeover Label
Information
Always read and follow manufac-
ture's recommended polarity.
1
3/4, 11/16 in
Ref. 190 821-A
Obtain gas cylinder and chain to
running gear, wall, or other station-
ary support so cylinder cannot fall
and break off valve.
1
Cap
2
Cylinder Valve
Remove cap, stand to side of
valve, and open valve slightly. Gas
flow blows dust and dirt from valve.
Close valve.
3
Cylinder
4
Regulator/Flowmeter
Install so face is vertical.
5
Regulator/Flowmeter Gas
Hose Connection
6
Welding Power Source Gas
1
Hose Connection
Connect customer supplied gas
hose between regulator/flowmeter
gas hose connection, and fitting on
2
rear of welding power source.
7
Flow Adjust
Typical flow rate is 20 cfh (cubic
feet per hour). Check wire man-
3
ufacturer's recommended flow
rate.
8
CO
Adapter (Customer Sup-
2
plied)
9
O-Ring (Customer Supplied)
Install adapter with O-ring between
regulator/flowmeter
and
cylinder.
Ref. ST-148 265-B / ST-802 028
CO
2