Miller Electric DWF3 - Manual (Page 17)

SECTION 3 OPERATION
OM-179 078 3-1
3.1 PRECAUTIONS
Verify the following before connecting power to control unit.
1. Make certain the drive unit is grounded.
2. Check that all connections are secure and properly installed. All connections should be made to the
torch and power supply before applying power to the control unit.
3. Should the cover of the control unit be removed for any reason, be sure the AC line cord is
disconnected.
4. Check line voltage selector switch on rear panel for proper input voltage being used.
CAUTION
THE CONTROL UNIT CAN OPERATE ON EITHER 100/120 VOLTS OR 208/230 VOLTS AC, 50 OR 60 HZ.
BE SURE TO SELECT THE PROPER INPUT VOLTAGE ON THE REAR PANEL BEFORE CONNECTING
TO POWER.
3.2 CONTROL DESCRIPTION – DWF–3
Refer to Figure 3.1 for location of the following front panel controls.
ON–OFF: Switches primary line voltage to the control unit. When power is ON, the power indicator will be
illuminated.
MANUAL START – OFF – REMOTE START: In the center OFF position, a wire feed cannot be initiated; in the
up MANUAL START position, a wire feed cycle is started. If this switch is placed down, in the REMOTE
START position, a wire feed cycle can be initiated by applying an external signal to the proper pins of the
remote connector on the rear panel. (See Section 3.4 for complete details on REMOTE START.) The feed
cycle stops for the DWF–3 system when either the REMOTE START (if used) or the MANUAL START switch
is placed in the OFF position.
REVERSE – FORWARD JOG: Pressing the Jog Switch down, to the FORWARD position, will cause wire to
feed out of the wire drive unit at the rate of 102.4 inches per min (2601 mm/min); this speed is factory set and
cannot be changed. Pressing the Jog Switch up, to the REVERSE position, will cause wire to be pulled back
into the wire drive unit – also at 102.4 inches per min (2601 mm/min). Releasing the switch will cause it to
return to the center OFF position. In this way wire can be pre–positioned for the weld cycle.
Figure 3.1, DWF–3 FRONT PANEL