MAC TOOLS MW250 Owner's Manual
  1. Manuals
  2. Brands
  3. MAC TOOLS Manuals
  4. Welding System
  5. MW250
  6. Owner's manual
MAC TOOLS MW250 Owner's Manual

MAC TOOLS MW250 Owner's Manual

Mac tools welding system owner's manual
Hide thumbs Also See for MW250:
Table of Contents

Advertisement

Quick Links

See also: Owner's Manual
OWNER'S MANUAL
IMPORTANT: Read and understand the entire contents of this manual, with special emphasis on the safety
material throughout the manual, before installing, operating, or maintaining this equipment. This unit and these
instructions are for use only by persons trained and experienced in the safe operation of welding equipment. Do
not allow untrained persons to install, operate, or maintain this unit. Contact your distributor if you do not fully
understand these instructions.
cover1 5/92* − ST-157 072-A
December 1997
Effective With Serial No. KH511668
MW250
®
Form: OM-154 501G
PRINTED IN USA

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the MW250 and is the answer not in the manual?

Questions and answers

Related Manuals for MAC TOOLS MW250

Summary of Contents for MAC TOOLS MW250

  • Page 1 December 1997 Form: OM-154 501G Effective With Serial No. KH511668 MW250 ® OWNER’S MANUAL IMPORTANT: Read and understand the entire contents of this manual, with special emphasis on the safety material throughout the manual, before installing, operating, or maintaining this equipment. This unit and these instructions are for use only by persons trained and experienced in the safe operation of welding equipment.
  • Page 3 ARC WELDING SAFETY PRECAUTIONS WARNING ARC WELDING can be hazardous. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN AWAY. PACEMAKER WEARERS KEEP AWAY UNTIL CONSULTING YOUR DOCTOR. In welding, as in most jobs, exposure to certain hazards occurs. Welding is safe when precautions are taken. The safety information given below is only a summary of the more complete safety information that will be found in the Safety Standards listed on the next page.

  • Page 4: Table Of Contents

    CYLINDERS can explode if damaged. 3. Keep cylinders away from any welding or other electrical circuits. 4. Never allow a welding electrode to touch any cylinder. Shielding gas cylinders contain gas under high 5. Use only correct shielding gas cylinders, regulators, hoses, and pressure.

  • Page 5: Section 1 − Safety Information

    SECTION 1 − SAFETY INFORMATION mod1.1 2/93 Read all safety messages throughout this manual. Obey all safety messages to avoid injury. Learn the meaning of WARNING and CAUTION. Safety Alert Symbol Signal Word WARNING means possible death or serious injury can happen. WARNING CAUTION CAUTION means possible minor...

  • Page 6: Volt-Ampere Curves

    2-1. Volt-Ampere Curves The volt-ampere curves show the minimum and maximum voltage and amperage output capabilities of the welding power source. Curves of other settings fall between the curves shown. ssb1.1 10/91 − SB-049 424-D Figure 2-1. Volt-Ampere Curves 2-2. Duty Cycle CAUTION WELDING LONGER THAN RATED DUTY CYCLE can damage unit or gun and void warranty.

  • Page 7: Section 3 − Installation

    SECTION 3 − INSTALLATION 3-1. Installing Work Clamp Work Cable Boot Slide boot onto work cable. Route cable out front panel opening from inside. Negative (−) Output Terminal Connect cable to terminal and cover connection with boot. Hardware Work Clamp Route cable through clamp handle and secure as shown.

  • Page 8: Installing Gas Supply

    3-2. Installing Gas Supply WARNING CYLINDERS can explode if damaged. BUILDUP OF SHIELDING GAS can harm • health or kill. Keep cylinders away from welding and other • electrical circuits. Shut off shielding gas supply when not in use. • Never touch cylinder with welding electrode.

  • Page 9: Gun Polarity Connections

    3-3. Gun Polarity Connections 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 Wire Drive Assembly Shown As Shipped − Set For Electrode Positive (DCEP) For Solid Steel Or Positive (+) Output Terminal Aluminum Wires (GMAW Process).

  • Page 10: Connecting Input Power

    Table 3-1. Electrical Service Requirements Input Voltage Input Amperes At Rated Output Max Recommended Standard Fuse Or Circuit Breaker Rating In Amperes Min Input Conductor Size In AWG/Kcmil Max Recommended Input Conductor Length In Feet (Meters) 89 (27) 117 (36) Min Grounding Conductor Size In AWG/Kcmil Reference: 1996 National Electrical Code (NEC).
  • Page 11 B. Connecting Input Power Have only qualified persons make this installation. Line Disconnect Device Of Proper Rating 230 Volts AC Wall Receptacle Input Conductors Grounding Conductor Select size and length using Table 3-1. Conductor rating must comply with national, state, and local electrical codes.

  • Page 12: Installing Wire Spool And Adjusting Hub Tension

    3-6. Installing Wire Spool And Adjusting Hub Tension Turn Off unit. Wire Spool Gun Contact Tip If necessary, cut welding wire off at contact tip, and retract wire onto spool and secure. Retaining Ring Compression Spring Remove ring and pull off spool. Compression spring is used with 8 in (200 mm) spools.
  • Page 13 Wire Spool Tools Needed: Welding Wire Inlet Wire Guide Pressure Adjustment Knob Drive Roll Outlet Wire Guide Gun Conduit Cable Lay gun cable out straight. 4 in 6 in (102 mm) (150 mm) Open pressure assembly. Pull and hold wire; cut off end. Push wire thru guides into gun;...

  • Page 14: Section 4 − Operation

    SECTION 4 − OPERATION WARNING ELECTRIC SHOCK can kill. ARC RAYS can burn eyes and skin; • NOISE can damage hearing. Always wear dry insulating gloves. • • Wear welding helmet with correct shade of filter. Insulate yourself from work and ground. •...
  • Page 15 Wire Speed Control Use control to set wire feed speed. Voltage Control Use control and Voltage Range Se- lector (see Figure 4-2) to set arc voltage. Step 6 of Low range and Step 1 of High range overlap. Pilot Light Power Switch Use switch to turn unit On and Off.

  • Page 16: Section 5 − Maintenance & Troubleshooting

    SECTION 5 − 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 17: Overload Protection

    5-2. Overload Protection READ SAFETY BLOCKS at start of WARNING Section 5 before proceeding. A. Circuit Breaker CB1 Circuit Breaker CB1 Pilot Light If CB1 opens, pilot light goes out, and wire feed stops. Check gun lin- er for blockage or kinks, and check for jammed wire, binding drive gear, or misaligned drive rolls.

  • Page 18: Changing Drive Rolls And Wire Inlet Guide

    5-3. Changing Drive Rolls And Wire Inlet Guide Securing Screw Inlet Wire Guide Loosen screw. Slide tip as close to drive rolls as possible without touching. Tighten screw. Anti-Wear Guide Install guide as shown. Drive Roll Install correct drive roll for wire size and type.

  • Page 19: Gun Maintenance

    5-5. Gun Maintenance READ SAFETY BLOCKS at start of WARNING Section 5 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 unit and disconnect input power.

  • Page 20: Troubleshooting

    5-6. Troubleshooting READ SAFETY BLOCKS at start of WARNING Section 5 before proceeding. Welding Trouble Remedy Section No weld output; wire does not feed. Secure power cord plug in receptacle. Reset circuit breaker CB1. Replace fuse F1 and/or F2. Replace building line fuse or reset circuit breaker if open. Secure gun trigger plug in receptacle or repair leads, or replace trig- ger switch.

  • Page 21: Section 7 − Parts List

    SECTION 7 − PARTS LIST FIG 7−2 FIG 7−4 ST-155 610-D Figure 7-1. 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 146 168 Enclosure Panel 009 970 ·...
  • Page 22 Fig 7-3 ST-155 609-C Figure 7-2. Baffle w/Components (Fig 7-1 Item 2) 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 174 861 Drive Assembly, (Fig 7-3) 186 998 Kit Capacitor 165 745...
  • Page 23 See Table 7-1 for Drive Roll & Wire Drive Kits ST-148 529-C Figure 7-3. Wire Drive And Gears (Fig 7-2 Item 1) Item Part Item Part Item Part Description Description Description 602 009 Screw, .250-20 x 1.25 151 828 Cotter Hair Pin 173 620 Bushing 172 075...
  • Page 24 Item Part Description 110 793 Handle Assembly 110 780 Nut, M 10 x 1 175 180 Head Tube 175 177 Diffusor 175 175 Holder, tip recessed ♦ 175 176 Holder, tip flush ♦ 175 230 Contact Tip, .025 (10pk) ♦ 175 231 Contact Tip, .030 (10pk) 175 232...
  • Page 25 Notes OM-154 501 Page 22...
  • Page 26 Notes OM-154 501 Page 23...
  • Page 27 Warranty Effective January 1, 1997 (Equipment with a serial number preface of “KH” or newer) This limited warranty supersedes all previous manufacturers Limited Warranty shall not apply to: warranties and is exclusive with no other guarantees or Items furnished by manufacturer, but manufactured by warranties expressed or implied.
  • Page 28 Owner’s Record Please complete and retain with your personal records. Model Name Serial/Style Number Purchase Date (Date which equipment was delivered to original customer.) Distributor Address City State Resources Available Always provide Model Name and Serial/Style Number. Welding Supplies and Consumables Contact your Distributor for: Options and Accessories Personal Safety Equipment...

Table of Contents