Miller Multimatic 255

To Next Page

To Previous Page

OM-278174 Page 11

Complete Parts List is available at www.MillerWelds.com

Wire Type

Gas Metal Arc

Welding (GMAW)

Gas Metal Arc

Welding (GMAW)

MIG/Gun Control

Self Shielded Flux

Cored Arc Welding

(FCAW)

Wire Feed Spool

Gun

Gas Postflow

Gas Preflow

Cold Jog (Inch) To-

ward Workpiecel

Pulse

Main Page

Table of Contents3
Section 1 - Safety Precautions - Read before Using5
Symbol Usage5
Arc Welding Hazards5
Additional Hazards for Installation, Operation, and Maintenance7
California Proposition 65 Warnings8
Principal Safety Standards8
EMF Information8
Section 2 - Consignes de Sécurité - Lire Avant Utilisation9
Symboles Utilisés9
Dangers Relatifs au Soudage à L'arc9
Symboles de Dangers Supplémentaires en Relation Avec L'installation, le Fonctionnement et la Maintenance11
Proposition Californienne 65 Avertissements13
Principales Normes de Sécurité13
Informations Relatives aux CEM13
Section 3 - Definitions14
Additional Safety Symbol Definitions14
Miscellaneous Symbols and Definitions14
Section 4 - Specifications16
Serial Number and Rating Label Location16
Software Licensing Agreement16
Information about Default Weld Parameters and Settings16
Unit Specifications for MIG (GMAW)16
Unit Specifications for Stick (SMAW)16
Unit Specifications for TIG (GTAW)16
Environmental Specifications17
Dimensions and Weight17
Duty Cycle and Overheating for MIG18
Duty Cycle and Overheating for Stick19
Duty Cycle and Overheating for TIG20
Static Characteristics20
Section 5 - Installation21
Selecting a Location21
Electrical Service Guide22
Connecting 1-Phase Input Power23
Wiring Optional 240 Volt Plug (119172) for Connection to Miller Welder/Generator with Split-Phase 240 Volt Auxiliary24
Power24
Generator or Inverter Requirements25
Selecting Cable Sizes25
Weld Output Terminals26
Process/Polarity Table26
MIG Welding Connections27
MIG Gun Connection Inside Unit28
Stick Welding Connections29
TIG Welding Connections DCEN (Direct Current Electrode Negative)30
Connecting Shielding Gas Supply31
Installing Wire Spool and Adjusting Hub Tension32
Threading Welding Wire33
Connecting Spoolmatic34
Or 30A or Spoolmate 200 Gun34
Connecting XR-Aluma-Pro or XR-Aluma-Pro-Lite35
Threading Welding Wire for XR-Aluma-Pro or XR-Aluma-Pro Lite36
Threading Welding Wire for Spoolmate 20037
Threading Welding Wire for Spoolmatic 15/30A38
Calibrating Spoolgun39
Section 6 - Operation40
Controls40
Special Features41
Using Auto-Set42
Elite42
Using Manual Mode43
Manual MIG Set-Up Mode44
Manual Stick Set-Up Mode45
Manual TIG Set-Up Mode46
Setting Crater Time47
Manual Program Mode48
Using Optional MDX-250 EZ-Select49
Gun in Program Mode49
Pulsed MIG Auto-Set Mode50
Pulsed MIG Manual Mode51
Pulsed TIG Manual Mode52
System53
Support54
Welding Parameter Chart - MIG56
Welding Parameter Chart - Stick and TIG58
Section 7 - Maintenance and Troubleshooting60
Routine Maintenance60
Changing Drive Roll or Wire Inlet Guide60
Overheating60
Aligning Drive Rolls and Wire Guide61
Error Messages62
Troubleshooting64
Section 8 - Parts List65
MDX-250 MIG Gun Consumables and Recommended Spare Parts65
Drive Roll and Wire Guide Kits65
Section 9 - Electrical Diagrams66
Section 10 - Gmaw Welding (Mig) Guidelines68
Typical GMAW (MIG) Process Connections68
Typical GMAW (MIG) Process Control Settings68
Holding and Positioning Welding Gun69
Troubleshooting - Excessive Spatter72
Troubleshooting - Lack of Penetration73
Section 11 - Stick Welding (Smaw) Guidelines76
Section 12 - Selecting and Preparing a Tungsten for DC or Ac Welding with Inverter Machines84
Selecting Tungsten Electrode84
Preparing Tungsten Electrode for DC Electrode Negative (DCEN) Welding or AC Welding with Inverter Machines85
Warranty87

Miller Multimatic 255 - Page 15

Table of Contents

Related product manuals