Lincoln Electric IM467-B manual Overload Protection, Auxiliary Power, ALL Machines

Page 35

B-20

B-20

OPERATION

11.Hold the Arc Start switch down until an arc is established. At this point, the Arc Start Switch can be released, and the weld will continue. Press and release the Arc Start switch a second time to stop the arc. When the Afterflow timer completes the cycle, the gas and water valves close. To make another weld, repeat steps 10 and 11.

Note: Starting difficulties may often be due to not pressing the Amptrol far enough. When the Amptrol is just “cracked,” the minimum current (2 amps) is pro- duced. Pressing the Amptrol more at the start of the weld will often solve starting problems.

OVERLOAD PROTECTION

The Square Wave TIG 355 has thermostatic protection from overloads, loss of cooling, and high ambient tem- peratures. When the welder is subjected to an over- load or loss of cooling, a thermostat will open.

If the secondary thermostat opens, the effect will be the same as pushing the Stop power pushbutton: the power will go off, the pilot light and meters will go out, and the fans will stop. Pressing the Start power push- button after the thermostat cools and resets will restart the welder.

If the primary thermostat opens, the power will stay on (pilot light and meters on and fans running), but no more than 5 amps DC output current will be available. This allows the fans to cool the machine. Depending on the amount of welder overload, the thermostat should reset within five minutes with the fan motors running. When the primary thermostat cools and resets, normal output current will be available.

AUXILIARY POWER

ALL MACHINES

The Square Wave TIG 355 provides 15 amps of 115 volt AC power at a standard NEMA 5-15R receptacle, located on the lower case back of the machine. This circuit is protected from shorts and overloading by a 15 amp circuit breaker, located next to the receptacle. The auxiliary circuit is intended for running water cool- ers and small power tools, whose current draw is with- in the 15 amp rating.

CAUTION

Note that some types of equipment, especially pumps and motors, have starting currents significantly higher than their running currents. These higher starting cur- rents may cause the circuit breaker to open. If this sit- uation occurs, the user should avoid using the Square Wave TIG 355 auxiliary for that equipment.

SQUARE WAVE TIG 355

FEB97

Page 34 Page 36
Image 35
Page 34 Page 36
Contents Square Wave TIG Safety Electric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Thank You Table of Contents P196 Series Section CSection D Section ETechnical Specifications Square Wave TIG InstallationHigh Frequency Interference Protection Safety PrecautionsSelect Suitable Location Electric Shock can kill Input ConnectionsGround Connection Input Supply ConnectionFigure A.2 Input Supply Connections Reconnect ProcedureVolt/Freq AC Output AWG Copper Cond Table A.1 Recommended Input Wire and Fuse SizesTable A.2 Recommended Input Wire and Fuse Sizes Volt/Freq Nameplate AWG Copper Cond100 ft 30 m 30 to 61 m 61 to 76 m Output ConnectionsTIG Torch Connection Lengths up to 100 to 200 ft 200 to 250 ftStick Electrode Cable Connection Operating Instructions Safety InstructionsRecommended Processes Operational Features and ControlsDesign Features and Advantages General DescriptionLimitations Welding CapabilityUpper Case Front Controls Controls and SettingsUpper Case Front Control Panel Mode SwitchSTEP/4-STEP Switch High Frequency SwitchAuto Balance LED VOLTS/AMPS SwitchPeak Current Control AC Wave BalanceStart Controls Spot ControlsPulse Controls Crater Fill Controls Figure B.2 Status Indicator Light Sequence Square Wave TIGOperation Figure B.3 Lower Case Frontcontrols Square Wave TIG Lower Case Front ControlsOperation Hand and Foot Amptrol Operation Operation TIG Welding Guidelines Welding OperationInitial START-UP Stick WeldingTable B.1 Specific Effects of Controls Illustrated in the 2-Step Mode for clarityOFF Crater Fill Switch onSpot Switch on Start Switch onPulse Switch on Crater Fill Switch on Spot Switch OFFDcen Dcep + Unbalanced Wave Balanced Wave Table B.2 Typical Current RANGES1 for Tungsten ELECTRODES2Polarity Switch TIG Welding Sequence Operation 2-STEP ModeTIG Welding Sequence Operation 4-STEP Mode Table B.3 Recommended Settings for TIG WeldingALL Machines Auxiliary PowerOverload Protection OPTIONS/ACCESSORIES AccessoriesInput Power Factor Capacitor Discharge Procedure MaintenanceRoutine and Periodic Maintenance Figure D.2 General Component Locations General Machine Trouble Troubleshooting GuideSymptom Cause and Remedy Troubleshooting Guide Stick WeldingTroubleshooting Guide TIG Welding TIG Welding Lower Panel Controls K870 Foot Amptrol or K963 Hand Amptrol AccessoriesDiagrams Dimension Print Square Wave TIG355 Equipment MANUFACTURER’S Certification Equipment Installation CertificationPage Precaucion Aviso DE
Top Page Image Contents