Miller 300951 Owner's Manual - Page 21

Browse online or download pdf Owner's Manual for Welding System Miller 300951. Miller 300951 32 pages. Mpa drive assembly

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6-3. Troubleshooting

Trouble

Electrode wire feeding stops or feeds er-

ratically during welding.

Motor runs slowly.

Motor runs at full speed regardless of

wire speed setting.

Notes

Readjust hub tension and drive roll pressure.

Change to correct size drive roll.

Clean or replace dirty or worn drive roll.

Incorrect size or worn wire guides.

Replace contact tip or liner. See gun Owner's Manual.

Remove weld spatter or foreign matter from around gun nozzle opening.

Check and secure motor plug connection.

Have Factory Authorized Service Agent check drive motor.

Reduce load.

Check for correct input voltage.

Have Factory Authorized Service Agent check digital wire drive motor Tachometer board and encoder.

Remedy

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