Miller Electric XR A - Manual (Page 40)

OM-1581 Page 36
6-10. Adjusting Hub Tension
Turn On welding power source and
wire feeder to make this
adjustment.
1
Wire Speed Control
Adjust control to wire speed for
welding.
2
Jog Switch
Push up, and then release Jog
switch. Hub tension is okay if wire
unwinds freely, but wire does not
backlash when Jog switch is
released.
3
Cap Screw
Turn cap screw to adjust hub ten-
sion. Do not overtighten. Turn Off
welding power source and wire
feeder. Close and latch door.
151 666-E / Ref. 802 536 / Ref. 176 700-A
Tools Needed:
1
3
7/16 in
2
6-11. Overload Protection
Ref. 151 779-A / Ref. 800 185-A
3
Turn Off wire feeder and welding
power source.
If F1 opens, the unit shuts down. To
check or change F1, proceed as
follows:
1
Fuse Holder Cover
2 Fuse F1 (See Parts List For
Rating)
Insert new fuse into cover, and in-
stall fuse with cover by pressing and
turning cover clockwise.
3
Circuit Breaker CB1
If CB1 opens, the gun drive motor
and contactor will not operate, but
gas flows when trigger is pulled. The
gun drive motor operates in the Jog
mode with CB1 open.
Check for blocked gun liner.
Check for jammed wire, binding
drive gear or misaligned drive rolls
in feeder. Correct problem.
Allow cooling period and manually
reset breaker. Close and latch door.
1
2
Push And Turn
Pull Out And Replace F1
Push And Turn
6-12. Water Flow Switch (Optional For Water-Cooled Models)
The water flow switch protects the gun from overheating. If coolant flow rate drops below 1 qt/min, the water flow
switch opens and stops the welding wire from feeding. See Section 6-13 for remedies to this trouble.