Hobart Welding Products TM-944C manual 510, 600, 700

Page 27

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

 

 

 

 

 

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

Wire Speed And Drive Motor RPM Feeding Wire*

 

Voltage

 

 

 

 

Wire Diameter

Switch S2

Min.

Max.

Min.

Max.

And Type

Position

RPM

RPM

IPM

IPM

 

 

 

 

 

 

 

 

 

 

 

 

.030/.035 Solid

1

40

135

150

510

or Flux Core

2

50

160

190

600

 

 

3

70

190

260

700

 

4

90

205

340

800

 

 

 

 

 

 

*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.

Drive Motor RPM At No Load*

Voltage

Min.

Max.

Switch S2

Position

RPM

RPM

 

 

 

 

 

 

1

80

150

2

110

175

3

135

200

4

160

235

 

 

 

*All tests done with the pressure assembly open, not feeding wire. Values are nominal.

194 325-A

Handler 135 / 175

Return To Table Of Contents

TM-944 Page 25

Image 27
Contents TM-944C ProcessesDescription Table of Contents − Safety Precautions for Servicing Symbol UsageServicing Hazards Overuse can cause Overheating California Proposition 65 WarningsEMF Information Radiation can cause interference− Specifications SpecificationsVAC Model Output Amperes Duty Cycle And OverheatingOutput Duty Cycle %Volt-Ampere Curves Installing Welding Gun Installing Work Clamp − InstallationChanging Polarity Electrode Negative For Flux Core WireFor Solid Wire Process/Polarity TableInstalling Gas Supply Up to 200 ft 61 m Rating LabelGrounded Receptacle Volt, 20 ampere individualL2 L1 230 VAC Do not move or operate unit where it could tip18 in 457 mm of space for airflow = GND/PEReference 1996 National Electrical Code NEC Electrical Service Guide For 230 VAC ModelInstalling Wire Spool And Adjusting Hub Tension 230Reinstall contact tip and nozzle Threading Welding WirePressure Indicator Scale Be sure that tip matches wire diameterControls Voltage SwitchPower Switch − OperationWeld Parameter Chart For 115 VAC Model While Starting Value only − Wire Speed Setting Can beWire Speed Also Depends on Other variables Such Stick Out Electrode Positive For Solid WireWeld Parameter Chart For 230 VAC Model Metal Etc Listed Starting Value Only − Wire Speed Setting can be− Theory of Operation Polarity Block Wire Drive MotorStablizer L1 MainTroubleshooting Table − TroubleshootingClear blockage in gun GS1 if necessaryTM-944 V8/R5 V9/R6 V10 V11/R9640 030/.035 Solid585 Or Flux CoreHandler 135 Test Equipment Needed510 600700 Control Board PC1 Testing Information 115 VAC Model Circuit common Control Board PC1 Test Point Values 115 VAC ModelControl Board PC1 Testing Information 230 VAC Model Control Board PC1 Test Point Values 230 VAC Model Overload Protection Drive Motor Protection − MaintenanceRoutine Maintenance Disconnect power before maintainingChanging Drive Roll Or Wire Inlet Guide Turn Off power before replacing contact tipReplacing Gun Contact Tip Cleaning Or Replacing Gun Liner Disconnect gun from unitTo Reassemble Gun Replacing Switch And/Or Head Tube Model Serial Or Style Number Circuit Diagram Wiring Diagram − Electrical Diagrams194 324-C 194 325-A 196 637-A 196 655-A 195 890-A 195 891-A Handler 135 H-10 Gun 11 10 − Parts ListDia Part Mkgs Description Quantity Optional Optional Drive Rolls Options195 Hobart Welding Products