Miller XR Python El manual del propietario descargar pdf (Pagina 13)

OM-1500-17 Page 9

SECTION 5 − MAINTENANCE & TROUBLESHOOTING

5-1. Routine Maintenance

Y Disconnect power

before maintaining.

. Maintain more often

during severe conditions.

Each Spool Of Wire

Blow Out Gun

Casing and Conduit

Clean

Nozzle

And Check

Contact Tip

3 Months

Replace

Damaged Or

Unreadable

Labels

Clean And

Tighten

Weld

Terminals

Replace Damaged

Gas Hose

Repair Or Replace

Cracked Cables

And Cords

5-2. Troubleshooting Guide

Y Disconnect power before troubleshooting.

To aid in troubleshooting problems with your welding equipment, it is best to understand the basic theory of operation

for this Push-Pull System. The push motor in the feeder runs at a fast, constant speed, but has very low torque. It

is always trying to feed more wire than the gun motor wants, and when the motor gets all it wants, it slows the push

motor, preventing a bird’s nest. Because of the low torque produced by the push motor, a brake system rather than

drag tension is used to prevent wire overrun when the motor stops. The drag adjustment in the feeder is used simply

to keep the wire slightly taut, to prevent wire overrun while feeding wire.

The high torque 24VDC gun motor is controlled by a solid state speed control located in the feeder, and a pot located

in the gun. The gun motor, potentiometer, and micro switch are connected to the cabinet/control box via a control cable

and Amphenol connector. If this cable becomes damaged, a variety of symptoms can occur, depending on which

wire(s) break. To test, check each wire for continuity and shorts.

Remember, the micro switch in the gun activates both the push motor and gun motor circuits in the cabinet. Therefore,

if the push motor and brake solenoid operate, but the gun does not, look more toward the gun motor’s 24VDC circuits,

speed control, control cable, or the gun motor. If nothing operates, look more toward the push motor’s input, micro

switch leads, or micro switch.

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Miller XR Python El manual del propietario Pagina 13

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