Miller Electric XR A, XR W manual Voltage Sensing Lead Connections, Reinstall right side panel

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4-10. Voltage Sensing Lead Connections

2

3

			3
			1
			5
4	6
	RC5		E D C B A
	RC5
	3	2	1
	EXT		INT

Tools Needed:

1/4 in

Unit is factory set for constant volt- age (CV) welding. To set unit for constant current (CC) welding, proceed as follows:

1Terminal Strip 2T

2Strain Relief

Loosen screws of strain relief.

3 Voltage Sensing Lead

Route ring terminal end of lead through strain relief, and connect ring terminal to terminal A of terminal strip 2T. Tighten screws on strain relief.

4Motor Speed Control Board PC1

5Jumper Plug

6Receptacle RC5

For constant voltage (CV) welding, place jumper plug in INT. position. Do not connect voltage sensing lead clamp to workpiece.

For constant current (CC) welding, place plug in EXT. position. Connect clamp end of voltage sensing lead to workpiece.

Reinstall right side panel.

Ref. 151 772-B

OM-1581 Page 17

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Contents Processes OM-1581137 532YDescription File MIG GmawFrom Miller to You Table of Contents Spot Controls Optional TroubleshootingMarks a special safety message Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion ARC Rays can burn eyes and skinFlying Metal can injure eyes Buildup of GAS can injure or killCalifornia Proposition 65 Warnings Principal Safety Standards EMF InformationAbout Pacemakers UNE Décharge Électrique peut entraîner la mort LES Fumées ET LES GAZ peuvent être dangereuxIndique un message de sécurité particulier Incendie ou une explosion LE Soudage peut provoquer unDES Particules Volantes peuvent blesser les yeux DES Pièces Chaudes peuvent provoquer des brûlures gravesLA Chute DE L’APPAREIL peut blesser Risque D’INCENDIE OU D’EXPLO’EMPLOI Excessif peut SUR DES Organes Mobiles peuvent provoquer des blessuresEn ce qui concerne les stimulateurs cardiaques Principales normes de sécuritéWire Feeder Specifications − SpecificationsGun Specifications Duty Cycle And Overheating− Installation Constant Voltage CV Weld- ing Power Source Plug Removing Top Cover Of Pistol Grip Gun Top Cover Triangular BossPush door back into original posi- tion to close Air-Cooled Gun Connections Water-Cooled Gun Connections Regulator Air-Cooled Feeder ConnectionsTop View Rear Panel Water-Cooled Feeder ConnectionsReturn Fitting On Supply Fitting On RegulatorVoltage Sensing Lead Connections Reinstall right side panel11 VAC/Contactor Control Plug Information Or -4, install 5-pin or Pins a & B of PLG5Receptacle on welding power Source, and install plug ontoInstalling Wire Spool Threading Welding Wire Through Feeder Coolant Guidelines Threading Welding Wire Through GunAdjusting Wire Feed Starting Speed − Operation Safety EquipmentFront Panel Controls Of Feeder Air-Cooled Model Shown Work And Voltage Sensing Cable ClampsJog Switch Voltage/Wire Speed Switch And Meter OptionalRun-In Speed Control Power Switch Spot Controls OptionalRemote Voltage Control Optional Internal Controls Flowmeter OptionalShielding Gas Gun ControlsCoolant Supply For Water-Cooled Models Only Sequence Of Gas Metal Arc Welding Gmaw − Continuous Or SpotRoutine Maintenance − Maintenance & TroubleshootingTurn Off all power before maintaining MonthsChanging Or Cleaning Gun Drive Roll Changing Feeder Drive Roll And Wire Inlet Guide Close pressure roll assembly. Close and latch door Removing Diffuser In Air And Water-Cooled Pistol-Grip Guns Changing Gun Contact TipReplacing The Liner Turn Off welding power source and wire feederSplit End Drive Roll Collet NutClose gun pressure roll assembly and reinstall gun cover Replacing Hub AssemblyAdjusting Hub Tension Water Flow Switch Optional For Water-Cooled ModelsOverload Protection Wire Feeder Trouble TroubleshootingReinstall current pick-up tab if applicable see Section Filter, and clean fittings see SectionGun Trouble Circuit Diagram For Wire Feeder − Electrical DiagramsCircuit Diagram For Gun OM-1581 − Parts List 12 13 9 10 17 18 1745 46 Dia Part Description Quantity Mkgs CB1 Includes Items Motor & Wire Drive -1 ItemPanel, Front w/Components Water-Cooled Model Illustrated Panel, Front w/Components -1 Item 38Fig Items 24Includes PLG20 136 Head Tube Assembly Of Pistol-Grip Gun Number − Parts List Including ConsumablesHeavy Duty FasTiptContact Tips Extra Heavy Duty FasTiptContact TipsTapered FasTipt Contact Tips Insulators Gas DiffusersBarrel Assemblies Head Tube AssembliesService Your distributor also givesSupport Miller Electric Mfg. Co To locate a Distributor or Service Agency visitFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s