Hobart Welding Products TM-944C User Manual
Page 27
TM-944 Page 25
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Voltage Readings
a)
Tolerance −
±
10 % unless
specified
b)
Wiring Diagram − see Section 8
V1
230 volts ac with power cord plugged in
V2
230 volts ac with Power switch S1 On
V3
24 volts ac with Power switch S1 On
V4
30 volts dc with Power switch S1 On
V5
27 volts dc with gun trigger pressed
V6
230 volts ac with gun trigger pressed
V7
230 volts ac with gun trigger pressed
V8,
13.9 volts ac with Voltage switch S2
V9
in position 1
16.5 volts ac with Voltage switch S2
in position 2
19.1 volts ac with Voltage switch S2
in position 3
21.7 volts ac with Voltage switch S2
in position 4
V10
18.9 volts dc with Voltage switch S2
in position 1
22.6 volts dc with Voltage switch S2
in position 2
25.1 volts dc with Voltage switch S2
in position 3
29.8 volts dc with Voltage switch S2
in position 4
V11
7.0 to 17.5 volts dc from min. to max. of
Wire Speed control R1 with
Voltage switch S2 in position 1
10.0 to 20.5 volts dc from min. to max. of
Wire Speed control R1 with
Voltage switch S2 in position 2
12.7 to 24.0 volts dc from min. to max. of
Wire Speed control R1 with
Voltage switch S2 in position 3
15.5 to 27.0 volts dc from min. to max. of
Wire Speed control R1 with
Voltage switch S2 in position 4
Voltage
Switch S2
Position
Min.
RPM
Max.
RPM
Min.
IPM
Max.
IPM
1
2
3
4
40
50
70
90
135
160
190
205
150
190
260
340
510
600
700
800
Wire Diameter
And Type
*All tests done with .030-.035 liner in H-10 model 10 foot welding gun, smooth
groove drive roll.
Values are nominal depending on drive roll pressure and spool hub tension.
Resistance Values
a)
Tolerance −
±
10% unless specified
b)
Turn Off unit and disconnect input
power before checking resistance
R1-R6 All values for T1 are less than 1 ohm
R7
Less than 1 ohm at minimum position of
Wire Speed control R1; 55k ohms at
maximum position of Wire Speed control R1
R8
Less than 1 ohm
R9
Less than 2 ohms with wire feed motor
disconnected from circuit
.030/.035 Solid
or Flux Core
194 325-A
Wire Speed And Drive Motor RPM Feeding Wire*
Min.
RPM
Max.
RPM
1
2
3
4
80
110
135
160
150
175
200
235
*All tests done with the pressure assembly
open, not feeding wire. Values are nominal.
Drive Motor RPM At No Load*
Voltage
Switch S2
Position