Miller Electric D-74S Welder User Manual


 
OM-1500-6 Page 18
SECTION 6 OPERATION
6-1. Power Switch
1 Power Switch
1
Ref. 803 065
1 Left/Right Select Switch
Pressing the Left/Right Select
switch allows the operator to
choose which side of the unit’s con-
trols will operate.
6-2. Left/Right Select Switch
1
Ref. 803 048
6-3. Jog/Purge
Pressing the Jog/Purge switch allows the op-
erator to jog wire without energizing the weld
power or gas valve circuit.
The unit also provides the ability to jog the
wire feeder by means of the gun trigger,
however, the contactor is energized for 3
seconds.
If the welding arc does not initiate in 3 sec-
onds after the gun trigger is activated, the
unit will perform a jog operation for a maxi-
mum of two minutes. If the gun trigger is still
activated after two minutes, the jog opera-
tion is terminated to prevent complete des-
pooling of the wire, as in the case of a dam-
aged gun.
Jog speed can be adjusted with the Wire
Speed control when the unit is jogging
wire. If equipped with meters, the unit dis-
plays jog speed while the unit is being
jogged.
Pressing the Jog/Purge button also allows
the operator to purge gas lines before
welding and to preset gas pressure at the
regulator.
1
Ref. 803 048
2
1 Jog/Purge Push Buttons
2 Wire Speed Controls
3 Gun Trigger Receptacles
3