Hobart Welding Products TM-944C manual Stablizer L1, Main, Polarity, Block Wire Drive Motor, Work

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10
9	11	13
Range Switch	Main Rectifier	Stablizer L1
S2	SR1	Stablizer L1
Main	12
Transformer		Capacitor C1
T1		Capacitor C1
		14
		Polarity
		Changeover
		Block
			15
		Wire Drive
		Motor
			Welding Wire
			(Electrode)
			Work
			AC Or DC Control Circuits
			Weld Current Circuit
Handler 135 / 175	Return To Table Of Contents		TM-944 Page 19

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Contents TM-944C ProcessesDescription Table of Contents − Safety Precautions for Servicing Symbol UsageServicing Hazards EMF Information California Proposition 65 WarningsRadiation can cause interference Overuse can cause Overheating− Specifications SpecificationsVAC Model Output Duty Cycle And OverheatingDuty Cycle % Output AmperesVolt-Ampere Curves Installing Welding Gun Installing Work Clamp − InstallationFor Solid Wire Electrode Negative For Flux Core WireProcess/Polarity Table Changing PolarityInstalling Gas Supply Grounded Receptacle Rating LabelVolt, 20 ampere individual Up to 200 ft 61 m18 in 457 mm of space for airflow Do not move or operate unit where it could tip= GND/PE L2 L1 230 VACInstalling Wire Spool And Adjusting Hub Tension Electrical Service Guide For 230 VAC Model230 Reference 1996 National Electrical Code NECPressure Indicator Scale Threading Welding WireBe sure that tip matches wire diameter Reinstall contact tip and nozzlePower Switch Voltage Switch− Operation ControlsWeld Parameter Chart For 115 VAC Model Wire Speed Also Depends on Other variables Such Stick Out Starting Value only − Wire Speed Setting Can beElectrode Positive For Solid Wire While Weld Parameter Chart For 230 VAC Model Metal Etc Listed Starting Value Only − Wire Speed Setting can be− Theory of Operation Stablizer L1 Block Wire Drive MotorMain PolarityTroubleshooting Table − TroubleshootingClear blockage in gun GS1 if necessaryTM-944 V8/R5 V9/R6 V10 V11/R9585 030/.035 SolidOr Flux Core 640Handler 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 Routine Maintenance − MaintenanceDisconnect power before maintaining Overload Protection Drive Motor ProtectionChanging 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