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SECTION 4
TROUBLE INDICATION
Incorrect wire feed speed.
Motor turns but wire does not
feed.
ITEM
QTY
1
1
2
1
3
1
4
2
5
1
6
1
7
2
8
2
9
1
10
1
11
1
12
1
13
1
14
A/R
15
1
16
2
17
A/R
OM-179 078
Check input signal (TP15 on Controller/Driver circuit board). Replace
speed pot or circuit board if necessary.
Verify that thumbscrew is fully seated. Exception: Back off one full turn
when using .020 in diameter wire.
Verify that correct drive rolls for wire diameter are installed (see Table
1.1).
Check roller surface; if excessively worn, slip of urethane wheels and
replace.
Verify that drive unit is connected to control.
Verify that all plugs are installed in the circuit board.
Check motor and cable continuity. It should be about 1.5 ohms from
pin A, D, E, and C referenced to pin B on motor connector. Repair or
replace if necessary.
Check motor current (speed less than 10 ipm = 80 to 110 mV between
TP7 and TP8. See Figure 4.2) Replace circuit board if necessary.
Loosen feed tension adjustment knob completely. Verify wire runs
smoothly off wire reel and through guides and conduit.
Verify thumbscrew is properly adjusted. Exception: Back off one full
turn when using .020 in diameter wire.
Verify correct drive rolls for wire diameter (see Table 1.1).
Check roller surface; if excessively worn, slip off urethane wheels and
replace.
TABLE 4.2 PARTS LIST FOR DRIVE ASSEMBLY
PART NMBR
179 168
179 169
–
179 170
–
–
179 171
179 172
179 173
179 174
179 175
–
–
–
179 176
–
–
MAINTENANCE AND REPAIR
REPAIR STEPS
DESCRIPTION
BOGIE ASSEMBLY, DWF–3
DRIVE MOTOR ASSEMBLY, DWF–3
COVER ASSEMBLY, DRIVE DWF–3
URETHANE ROLLER ASSEMBLY
HOUSING, WIRE FEEDER
RETAINER, DRIVE GEAR
BUSHING, GEAR SHAFT
SHAFT, BOGIE
GUIDE, WIRE – EXIT
GUIDE, WIRE – INLET
KNOB, SCREW
CLAMP, BACKSHELL
CONNECTOR, CIRCULAR STR PLUG
TUBING SHRINK, BLACK
SPRING COMPRESSION
STRAIN RELIEF – PLASTIC
TUBING SHRINK – BLACK
4-4
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