4-7. Installing Welding Gun
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1Drive Assembly
2Gun Securing Knob
3Gun End
Loosen securing knob. Insert gun end through opening until it bottoms against drive assembly (make sure gun end does not touch drive rolls). Tighten knob.
4 Gun Trigger Plug
Insert plug into receptacle, and tighten threaded collar.
Close door.
803
4-8. Setting Gun Polarity For Wire Type
Changing Polarity |
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| 1 | Polarity Changeover Label | |
Wire Drive | Work Clamp Lead |
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| Always read and follow manufac- | |
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| ture’s recommended polarity. | |||
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Assembly Lead |
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D
D
+Positive Terminal - Negative Terminal
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 |
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terminals from that shown above for gasless flux core wires |
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(FCAW). Drive assembly becomes negative. | 3/4, 11/16 in |
Ref. 190
