Miller 907731001 Owner's Manual - Page 40

Browse online or download pdf Owner's Manual for Welding System Miller 907731001. Miller 907731001 48 pages. With auto-line, arcreach, xmt 350 fieldpro and polarity reversing ce

Print Page

6-9.

Carbon Arc Gouging

Electrode Holder

Choose correct electrode holder for the

process.

Air Stream

The air stream should be in line with the

electrode and positioned between the

electrode and the workpiece.

Carbon Electrode

Choose the correct electrode size for the

desired gouge.

Gouging Arc

6-10. Restoring Factory Defaults

A factory reset of the power source can be accomplished by pressing the Stick and TIG buttons simultaneously for more than four seconds.

The display will show fSt and then go to dashes when the reset is complete.

6-11. Viewing Software Revision

Press and hold the Electrode and In Use buttons simultaneously to view the system software revision level.

While still holding down the Electrode push button, press the In Use push button again to display the User Interface software revision level.

6-12. Optional Low Open Circuit Voltage (OCV) Welding Modes

Low OCV Operation

The unit can be optionally configured for low open circuit voltage (OCV) operation in OUTPUT ON: Wire, Stick, Lift-Arc TIG modes. When the

unit is configured for low OCV operation a lower sensing voltage is present between the electrode and the workpiece prior to the electrode touch-

ing the workpiece. Consult a Factory Authorized Service Agent for information regarding how to configure the unit for low OCV welding operation.

OM-282217 Page 32

Direction Of

Travel

Keep the arc short.

Workpiece

Start air compressor and adjust regulator

to correct setting. Use the lowest air

pressure that will blow away the molten

metal. Ensure that the electrode point is

shaped correctly and insert it in the

electrode holder. The electrode should

extend no more than 7 in. (178 mm) and no

less than 2 in. (51 mm) from the electrode

holder. Strike the arc, then open the air

valve. Use proper arc and travel speed to

create the desired shape and condition of

the gouge.

Always cut away from the operator as

molten metal sprays some distance from

the workpiece.

Ensure that everyone in the work area is

not in the path of the spray.

Remove all combustible material from the

work area. Place metal deflection plates in

front of the operation.

258443-A