Miller Electric Bobcat 225 manual Operating the Welding Generator, Front Panel Controls

. A complete Parts List is available at www.MillerWelds.com

SECTION 6 − OPERATING THE WELDING GENERATOR

6-1. Front Panel Controls

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1 Engine Control Switch

Use switch to start engine, select speed, and stop engine. In Run/Idle position, engine runs at idle speed at no load, and weld/power speed under load. In Run position, engine runs at weld/power speed.

.Place switch in Run position to operate most MIG equipment.

2 Engine Choke Control

Use control to change engine air-fuel mix.

To Start: pull out choke and turn Engine Con- trol switch to Start position. Release switch and slowly push choke in when engine starts.

.If the engine does not start, let engine

come to a complete stop before attempt- ing restart.

To Stop: turn Engine Control switch to Off position.

3 Engine Hour Meter/Idle Control

Hour Meter: With engine off, place Engine Control switch in Run/Idle position to view en- gine hours.

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Oil Change Interval: With engine off, place En- gine Control switch in the Run position to see hours before next oil change. Oil hours start at 100 and count down to 0 (zero) (oil change due).

.Negative hours indicated when past rec- ommended oil change interval.

To reset, cycle Engine Control switch from Run/Idle to Run three times within five sec- onds (engine off).

4Weld Process Selector Switch NOTICE − Do not switch under load. Use switch to select type of weld output.

Wire (GMAW) Welding: Use a positive (+) position for Direct Current Electrode Positive (DCEP) and a negative (−) position for Direct Current Electrode Negative.

Stick (SMAW) and TIG (GTAW Welding): Use a positive (+) position for Direct Current Elec- trode Positive (DCEP) and a negative (−) posi- tion for Direct Current Electrode Negative. Use AC position for alternating current.

5 Coarse Range Switch

2 Ref. 228 199-A

NOTICE − Do not switch under load.

Use switch to select weld amperage range when Weld Process Selector switch is in Stick/ Tig position, or voltage range when switch is in Wire position.

.For best arc starts and when using weld and generator power together, use a low Coarse Range setting with the Fine con- trol set at 7 or higher.

6 Fine Control

Use control to select weld amperage (Stick/ Tig) or voltage (Wire) within the range selected by the Coarse Range switch. Control may be adjusted while welding.

Set control at 10 for maximum generator power.

Weld output would be about 110 A DC based on control settings shown (80% of 70 to 150 A). Settings shown are typical for welding with a 7018 (1/8) electrode.

.See Sections 6-3thru 6-5for typical pro- cess connections and control settings.

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