Miller Electric HF-251D-1, HF-251-2 manual Adjusting Spark Gaps

Page 22

5-2. Adjusting Spark Gaps

 

 

 

 

 

 

 

Turn Off unit and welding power

 

 

 

source and disconnect input power.

 

 

Rear Of Unit

Loosen screw on spark gap access

 

 

 

 

 

 

door and open.

 

 

 

1 Tungsten End Of Point

 

 

 

Do not clean or dress tungsten.

 

 

 

Replace point if tungsten end

 

 

 

disappears.

 

 

 

2

Spark Gap

 

 

 

Normal spark gap is 0.008 in (0.203

 

 

 

mm).

 

 

 

If spark gaps are okay, reinstall

 

 

 

door. If adjustment is needed, con-

 

 

 

tinue as follows:

 

 

 

3

Adjustment Screws

 

 

 

Loosen screws. Place gauge of

 

 

 

proper thickness in spark gap.

 

 

 

4

Pressure Point

 

 

 

Apply slight pressure at point until

 

 

 

gauge is held firmly in gap. Tighten

 

 

 

adjustment screws to 12 in/lbs

 

 

 

torque (overtightening will deform

 

 

 

plastic base). Repeat gauge adjust-

 

 

 

ment with other gap.

1

2

 

Close access door.

 

 

 

 

 

 

 

3

4

 

 

 

Tools Needed:

 

 

 

 

5/32 in

0.008 in

 

 

 

(0.203 mm)

 

 

 

 

 

 

 

Ref. 098 956-G

OM-611 Page 18

Return To Table Of Contents

Page 21 Page 23
Image 22
Page 21 Page 23
Contents Processes OM-611Description From Miller to You Table of Contents Page Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killCalifornia Proposition 65 Warnings EMF Information Principal Safety StandardsAbout Pacemakers Identifie un message de sécurité particulier − Consignes DE Sécurité − À Lire Avant UtilisationLES Pièces Chaudes peuvent cau- ser des brûlures graves LE Soudage peut causer un incen- die ou une explosionLES Particules Projetées peu- vent blesser les yeux LE Bruit peut affecter l’ouïe’EMPLOI Excessif peut Faire Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser LES Pièces Mobiles peuvent cau- ser des blessuresInformation sur les champs électromagnétiques Principales normes de sécuritéConsignes relatives aux stimulateurs cardiaques Specifications − InstallationTypical Process Connections Installing Gas Supply IN-GAS-OUTPower Source Plug Information And Connections Amperage ControlOperator Control Receptacle Socket Information Operator Control Receptacle Information And ConnectionsSocket Connecting To Weld Output Terminals Electrode Electrode OUT Work INPUT/OUTPUTConnecting Input Power − Operation High Frequency SwitchHigh Frequency Selector Switch ControlsHigh Frequency Intensity Control Power Switch And Pilot LightPostflow Timer Shielding Gas− Maintenance & Troubleshooting Routine Maintenance MonthsAdjusting Spark Gaps Troubleshooting Trouble Remedy− Electrical Diagrams Circuit Diagram For 115 Volts ModelCircuit Diagram For 230 Volts Model Welding Processes Requiring High Frequency Incorrect Installation− High Frequency Weld ZoneMetal Building Correct InstallationMetal Building Requirements Amperage Range Gas Type Polarity AC − Argon AC − Argon −Positioning The Torch − Guidelines for TIG Welding GtawPreparing Tungsten Electrode For Welding Preparing Tungsten For Conventional AC WeldingTungsten Without Filler Rod Torch Movement During WeldingPositioning Torch Tungsten For Various Weld Joints Tungsten With Filler RodReturn To Table Of Contents − Parts List Complete Assembly Part 1 of 2 115V ModelComplete Assembly Part 1 Complete Assembly Part 2 of 2 115V Model Complete Assembly Part 2 Page Page Page Service SupportOwner’s Record Miller Electric Mfg. Co
Top Page Image Contents