MAC TOOLS MW150K Owner's Manual
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MAC TOOLS MW150K Owner's Manual

MAC TOOLS MW150K Owner's Manual

Welding power source
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Read and follow these instructions and all
safety blocks carefully.
Have only trained and qualified persons
install, operate, or service this unit.
Call your distributor if you do not understand
the directions.
cover 8/92 – ST-155 663-A
OWNER'S
MANUAL
MW150K
May 1994
Form: OM-154 500B
Effective With Serial No. KD436311
Give this manual to the operator.
For help, call your distributor
PRINTED IN USA

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Summary of Contents for MAC TOOLS MW150K

  • Page 1 May 1994 Form: OM-154 500B Effective With Serial No. KD436311 OWNER’S MANUAL MW150K Read and follow these instructions and all Give this manual to the operator. safety blocks carefully. Have only trained and qualified persons For help, call your distributor install, operate, or service this unit.
  • Page 2 The following safety alert symbol and signal words are used throughout this manual to call attention to and identify different levels of hazard and special instructions. WARNING WARNING statements identify procedures or practices which must be followed to avoid serious personal injury or loss of life.

  • Page 3: Table Of Contents

    5. Watch for fire, and keep a fire extinguisher nearby. WELDING can cause fire or explosion. Sparks and spatter fly off from the welding arc. The 6. Be aware that welding on a ceiling, floor, bulkhead, or partition flying sparks and hot metal, weld spatter, hot can cause fire on the hidden side.

  • Page 4: Section 1 - Specifications

    SECTION 1 – SPECIFICATIONS Table 1-1. Welding Power Source Specification Description Type Of Output Direct Current/Constant Voltage (DC/CV) Rated Weld Output 120 Amperes, 21 Volts DC, 30% Duty Cycle Type Of Input Power Single-Phase; 60 Hz; At 230 Volts AC Input Amperes At Rated Output KVA/KW Used At Rated Output 4.7 kVA/3.9 kW...

  • Page 5: Section 2 - Installation

    SECTION 2 – INSTALLATION 2-1. Installing Work Clamp Insulator Bolt Smaller Hole Work Clamp Tabs Tools Needed: Bend tabs around work cable. Work Cable From Unit 3/8, 7/16 in Ref. ST-025 190-C Figure 2-1. Installing Work Clamp 2-2. Installing Gas Supply WARNING CYLINDERS can explode if damaged.

  • Page 6: Gun Polarity For Wire Type

    2-3. Gun Polarity For Wire Type WARNING ELECTRIC SHOCK can kill. Do not touch live electrical parts. Turn Off welding power source, and disconnect input power before inspecting or installing. swarn1.1 2/93 Polarity Changeover Label STRAIGHT REVERSE Polarity Jumper Links POLARITY POLARITY For Solid...
  • Page 7 WARNING ELECTRIC SHOCK can kill. Do not touch live electrical parts. Turn Off welding power source, and disconnect input power before inspecting or installing. Have only qualified electrician install unit. Installation must meet National Electrical Code and all other codes. swarn3.1* 10/91 Have only qualified persons make this installation.

  • Page 8: Threading And Feeding Welding Wire

    2-6. Threading And Feeding Welding Wire WARNING CYLINDERS can explode if damaged. WELDING WIRE can cause puncture wounds. Keep cylinders away from welding and other electrical circuits. Do not press gun trigger until instructed to do so. Never touch cylinder with welding electrode. Do not point gun toward any part of the body, other people, or any metal when threading welding wire.

  • Page 9: Section 3 - Operation

    SECTION 3 – OPERATION READ SAFETY BLOCKS at beginning WARNING of manual before proceeding. MOVING PARTS can cause injury. Keep away from pinch points such as drive rolls. Keep all doors, panels, covers, and guards closed and securely in place. ARCING can damage switch.
  • Page 10 Wire Speed Adjustment Control Use control to select a wire feed speed. As Voltage Adjustment switch setting increases, wire speed range also increases. The numbers around the control are not a wire feed speed (see Table 3-1). Voltage Adjustment Switch Use switch to select an arc voltage.
  • Page 11 Table 3-1. Suggested Welding Settings Material Thickness Wire Type, Wire Operator Shielding Gas, Diameter Control 3/16 in. 1/8 in. 1/4 in. And Flow Rate (inch) Settings (3.2 mm) 14 ga. 16 ga. 18 ga. 22 ga. 24 ga. (6.4 mm) (4.8 mm) Voltage –...

  • Page 12: Section 4 - Maintenance & Troubleshooting

    SECTION 4 – MAINTENANCE & TROUBLESHOOTING WARNING ELECTRIC SHOCK can kill. MOVING PARTS can cause injury. Do not touch live electrical parts. Keep away from moving parts. Turn Off welding power source, and disconnect Keep away from pinch points such as drive rolls. input power before inspecting, maintaining, or servicing.

  • Page 13: Drive Assembly Maintenance

    B. Motor Fuse F1 CAUTION STATIC ELECTRICITY can damage parts on circuit boards. Put on grounded wrist strap BEFORE handling boards or parts. fwarn5.1* 9/91 Turn Off and unplug unit. Unlatch door, and remove door/wrapper. Motor Control Board PC1 Fuse F1 (See Parts List For Rating) If F1 opens, wire does not feed.

  • Page 14: Gun Maintenance

    4-4. Gun Maintenance READ SAFETY BLOCKS at start of WARNING Section 4 before proceeding. FLYING METAL CHIPS AND DIRT can cause injury and damage equipment. Point gun away from people and in a safe direction when blowing out with compressed air. swarn10.1 10/91 Turn Off and unplug unit.

  • Page 15: Section 5 - Electrical Diagrams

    Wire Drive/Gun Trouble Remedy Section Electrode wire feeding stops during Straighten gun cable and/or replace damaged parts. welding. Adjust drive roll pressure. Readjust hub tension. Replace contact tube if blocked. Clean or replace wire inlet guide or liner if dirty or plugged. 4-3, 4-4 Replace drive roll or pressure bearing if worn or slipping.
  • Page 16 OM-154 500 Page 13...

  • Page 17: Section 6 - Parts List

    SECTION 6 – PARTS LIST OM-154 500 Page 14...
  • Page 18 Parts For Main Assembly NOTE: All items indented by a dot(s) are included with the item listed directly above. Item Part Item Part Item Part Description Description Description 089 899 Latch 157 044 Circuit Card 156 340 · Chain 602 384 ·...
  • Page 19 Notes...

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