Miller Electric XR Control manual Internal Controls, Gun wire feed speed

6-2. Internal Controls

1	5
2	6
	7
3
4

Open left side door.

1 Run-In Speed Control

Use this control to set run-in wire feed speed before arc initiation.

After arc initiation, weld wire feed speed is controlled by the wire speed setting on the welding gun (see Section 6-3).

The scale around the run-in speed control is a percent of weld wire feed speed.

Maximum run-in wirefeed speed is approximately one half of weld wirefeed speed.

Minimum run-in wirefeed speed is approximately 40 inches per minute (1 mpm).

.The gun wire feed speed

control adjusts wire speed from minimum to maximum setting on Wire Speed Control.

2Burnback Time Control (Optional)

Use control to adjust time (up to

0.25seconds) that the welding wire is electrically energized after the wire stops feeding.

If welding wire sticks in the weld puddle, increase burnback time. If wire burns back into the gun contact tip, decrease burnback time.

The scale around the control is marked in fractions of a second.

3 Spot Time Control (Optional)

Use control to set spot weld time. Welding wire feeds at speed selected on the gun Wire Speed Control. Spot time starts at arc initiation.

Rotating switch fully counterclockwise until it clicks selects an untimed continuous weld, all other positions will provide various timed spot welds.

The scale around the control is marked in seconds.

4 Time Range Switch

Use switch to select spot weld time range.

5Fuse F1 See Section 7-11.

6Circuit Breaker CB1 See Section 7-11.

7Motor Torque Switch

Use switch to select the force used to push wire. The up position is for high force, or torque. The down position is for low force, or torque.

Use Low position for .030 wire size and High position for all other wire sizes.

Close and latch door.

Ref. 801 578

OM-1594 Page 28