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Hobart Welding Products
250 installation instructions
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Troubleshooting
Specifications
Poor Weld Bead Characteristics
Install
Parts list
Electrical Diagram
Symbol Usage
Threading Welding Wire
Warranty
Maintenance
Page 44
Image 44
Notes
OM-192
440 Page 40
Page 43
Page 45
Page 44
Image 44
Page 43
Page 45
Contents
OM-192 440W
Processes
Description
File MIG Gmaw
From Hobart to You
Table of Contents
Warranty
Symbol Usage
Marks a special safety message
Arc Welding Hazards
Electric Shock can kill
ARC Rays can burn eyes and skin
Welding can cause fire or explosion
Flying Metal can injure eyes
Buildup of GAS can injure or kill
California Proposition 65 Warnings
About Pacemakers
Principal Safety Standards
EMF Information
Indique un message de sécurité particulier
UNE Décharge Électrique peut entraîner la mort
LES Fumées ET LES GAZ peuvent être dangereux
LE Soudage peut provoquer un
Incendie ou une explosion
DES Particules Volantes peuvent blesser les yeux
DES Pièces Chaudes peuvent provoquer des brûlures graves
Risque D’INCENDIE OU D’EXPLO
LA Chute DE L’APPAREIL peut blesser
’EMPLOI Excessif peut SUR
DES Organes Mobiles peuvent provoquer des blessures
Principales normes de sécurité
En ce qui concerne les stimulateurs cardiaques
Specifications
Welding Power Source Duty Cycle And Overheating
Exceeding duty cycle can damage unit and void warranty
Overheating
Definition
Welding Gun Duty Cycle And Overheating
Volt-Ampere Curves
Installing Welding Gun
Connecting To Weld Output Terminals
Installing Work Clamp
Setting Gun Polarity For Wire Type
Installing Wire Spool And Adjusting Hub Tension
Installing Gas Supply
Rear Panel
Positioning Jumper Links
Volts
Electrical Service Guide
Hz Single
Input Voltage
Min Grounding Conductor Size In AWG
Selecting a Location And Connecting Input Power
Threading Welding Wire
Wood
Turn Off unit, and disconnect input power
Operation
Connecting Spool Gun To Welding Power Source
Turn Off unit
− Operation
Controls
While welding
Voltage switch position
Weld Parameters
Number on left of slash
To read settings
Example 2/40 =
Routine Maintenance
Disconnect power before maintaining
Supplementary Protectors
Months
Removing Knob From Front Panel
Replacing Drive Roll And Wire Inlet Guide
Turn Off power
Turn Off power before replacing contact tip
Replacing Gun Contact Tip
Turn off welding power source/wire feeder
Wire size stamped on tip − check and match wire size
Replacing Switch And/Or Head Tube
Welding Troubleshooting Table
Wire Drive/Gun Troubleshooting Table
Wire Drive/Gun Trouble Remedy
Welding Trouble Remedy
− MIG Welding Gmaw Guidelines
Typical MIG Process Connections
Typical MIG Process Control Settings
Wire Size Amperage Range
Thickness to Amperage a
Amperage
Holding And Positioning Welding Gun
Conditions That Affect Weld Bead Shape
Gun Movement During Welding
Poor Weld Bead Characteristics
Good Weld Bead Characteristics
Troubleshooting − Excessive Spatter
Troubleshooting − Porosity
Troubleshooting − Excessive Penetration
Possible Causes Corrective Actions
Troubleshooting − Burn-Through
Troubleshooting − Lack Of Penetration
Troubleshooting − Incomplete Fusion
Troubleshooting − Waviness Of Bead
Troubleshooting − Distortion
Troubleshooting Guide For Semiautomatic Welding Equipment
Wire does not feed
Common MIG Shielding Gases
Application
Welding arc not stable Wire slipping in drive rolls
OM-192 440
− Electrical Diagram
− Parts List
REGULATOR/FLOWMETER, 10−50 CFH ARGON/CO2
Center Baffle w/Components
Center Baffle w/Components -1Item
Rear Panel w/Components
Front Panel w/Components
M-25 Gun
Optional Spool Gun Switch
Description Remarks
Page
Assistance
Service
Support
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Hobart Welding Products