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NS20A & NS20N
Heavy Duty Floating Lift
Welding Guns

Instruction and
Maintenance Manual

Version 1.30
December 2008

Manual Part Number 729-110-024

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Содержание NS20A

Страница 1: ...NS20A NS20N Heavy Duty Floating Lift Welding Guns Instruction and Maintenance Manual Version 1 30 December 2008 Manual Part Number 729 110 024 ...

Страница 2: ...rded Nelson s personnel a reasonable opportunity to inspect and repair said equipment at buyer s facility or such other location as is mutually agreeable Notice to Nelson must be given within 30 days of such defect or failure and within ninety 90 days from the date the equipment was delivered No compensation or reimbursement for transportation costs of any kind will be allowed Please note that thi...

Страница 3: ...djustment 2 Lift Adjustment 3 Nelweld Power Sources 3 Series 4800 Series 5000 TR 1600 4 Series 6000 TR 2400 4 Series 3000 NS 20A HD 5 WELD INSPECTION 6 Visual Inspection 6 Physical Inspection 6 SEQUENCE OF OPERATIONS 7 Exploded View 8 Parts List 9 MAINTENANCE INSTRUCTIONS 10 Part Number Designation 10 Disassembly of Gun 11 Examination and Cleaning of Gun Parts 12 Reassembly of Gun 12 Installing Ne...

Страница 4: ...rrule Grip Leg Setscrews Leg Plunge 1 8 1 4 Figure 1 Gun assembly Plunge Adjustment 1 Adjust the leg and foot assembly so that the stud extends to beyond the end of the ferrule Figure 1 2 When plunge is adjusted tighten the leg screws so that the Foot Assembly cannot move Note It is necessary to adjust plunge when changing stud lengths Free Travel Adjustment With the free travel adjustment sleeve ...

Страница 5: ... time if desired the gun will lift a second time without an arc being established The gun will stay lifted for a short time the default setting is two seconds refer to the Nelweld Manual for instructions on how to change this time if desired 3 Measure the inward movement of the shaft extension This is the actual lift that will occur under the welding condition Note Triggering the gun in the air aw...

Страница 6: ...Replace rear cap on gun Adjust for proper weld time Recommended Lift Settings for Steel Studs For welding diameter studs or less 1 16 and diameter studs 3 32 Series 6000 TR 2400 1 Load stud and ferrule into gun with proper plunge setting for welding 2 Set weld time at approximately second 3 Place gun in normal welding position on a piece of wood or other insulated type surface 4 Depress trigger bu...

Страница 7: ...se the gun to lift The lift in open air will be greater than when the gun is in the actual or simulated weld condition Caution Erratic lift can be caused by low voltage therefore it is suggested that a minimum of 65 volts open circuit voltage be used when checking lift or operating the stud welding equipment To Change Lift Remove rear cap on gun loosen lock screw and position the adjustable core a...

Страница 8: ...ing spider legs Inadequate length reduction or burn off Fillet sits on top of the base material A hot weld made with too much time and or amperage is distinguished by Excessive spatter A washed out fillet Undercutting of the stud Burn through the base material Physical Inspection If after visually inspecting the welds a questionable weld is evident the weld should be physically tested Initial weld...

Страница 9: ...d ring locks on the lifting rod and the movable core assembly lifts or pulls back the entire assembly including the chuck and stud Figure 6 6 When the stud is lifted from the work an arc is initiated 7 The assembly remains lifted for a preset weld time 8 At the end of this time period the gun coil 2 is de energized 9 The movable core assembly 3 is returned to normal position by the core spring 7 1...

Страница 10: ...NS20A NS20N Heavy Duty Gun Page 8 Revision 1 20 2 19 08 MAINTENANCE INSTRUCTIONS Exploded View Figure 7 14 ...

Страница 11: ... 526 001 192 1 18c 18c 18c 18c Lifting Hook Movable Core Assy 751 535 026 1 18d 18d 18d 18d Lifting Ring 751 535 022 1 18e 18e 18e 18e Lifting Mech Stop 751 535 023 1 18f 18f 18f 18f Retaining Springs 717 881 003 1 19 19 19 19 Front Bearing 751 000 013 1 20 20 20 20 Wave Washer 717 844 001 1 21 21 21 21 Cable Spacer 751 004 007 1 22 22 22 22 Wire Splice 713 032 000 4 23 23 23 23 Trigger Button 751...

Страница 12: ...00 with 2 wire control Nelweld Power Sources with 2 wire Control Control Cable Description 6 pin 4 wire 4 pin 3 wire 3 Pin 2 Wire 3 Pin 2 Wire Control Cable Part Number 721 194 000 721 194 001 721 215 000 721 215 000 Control Connector Type Cannon R S Hubbell Hubbell Control Connector Part Number 714 083 002 714 061 000 714 174 000 714 174 000 Control Connector Boot N A N A 714 174 002 714 174 002 ...

Страница 13: ...sembly 18 from the gun body 1 6 Remove screw 35 and rear cover 3 Loosen setscrew 38 and unscrew adjustable core 9 Do not unscrew loosen or remove rear coil yoke 14 or gun coil 6 7 Disassembly of the lifting module assembly 18 is not routinely required If further disassembly is necessary consult Figure 8 In order to disassemble the lifting module the internal retaining ring 18f must be removed from...

Страница 14: ...nserting the hook through a window of the lifting ring 18d with the flat side of the ring towards the lifting hook and movable core assembly NOTE The lifting ring should be reinstalled rotated 180 from the position it was in when removed to distribute the wear evenly Insert the assembled lifting ring and lifting hook and movable core assembly into the lifting module housing 18a Place lifting modul...

Страница 15: ... and green coil lead as close as possible to the wire splice 4 Remove cable spacer 21 from old control cable and install on new control cable 5 Connect new cable as follows Black lead to Red gun coil lead using splice 713 006 000 to one terminal on switch White lead to the other terminal on switch Green lead to green gun coil lead Note Connect green coil lead with insulated wire splice 22 or solde...

Страница 16: ...support assembly 25 and remove cable 4 Install new cable into cable support assembly allowing 12 inches of cable to extend forward from the front face of the cable support to the centerline of the cable lug The end of the Neoprene tubing is to be flush with the cable support Reassemble the cable support 5 Install cable and cable support into gun handle Reinstall handle cover 16 and secure with scr...

Страница 17: ...dard legs and foot plus cable loop to cable spud 7 lbs 8 oz Working Weight Includes standard legs and foot plus four 4 feet of cable from gun handle Note Four 4 foot length of cable is normally supported by the operator when in working position 10 lbs 8 oz Shipping Weight Includes standard legs and foot plus approximately 7 feet of cable with connectors normally supplied with gun 14 lbs 8 oz ...

Страница 18: ...d hearing protection need Consult OSHA standard 29 CFR Part 1910 Subpart Q Welding Cutting and Brazing for additional information Protective Clothing The use of protective clothing is recommended The type of protection will vary with the stud welding process application weld position and stud size being welded but flame resistant clothing including high boots gloves apron leather leggings etc shou...

Страница 19: ...emmes Avenue Richmond VA 23225 Phone 800 635 9353 San Francisco 23765 Foley Street Hayward CA 94545 Phone 510 293 0660 800 635 9353 Fax 510 293 0677 Seattle Export 406 26th Avenue Place Milton WA 98354 Phone 253 874 3524 Fax 253 874 5748 Tampa Export P O Box 3990 Seminole FL 33775 Phone 727 596 9600 Fax 727 593 3494 Tampa US 9401 Ayleshire Place Riverview FL 33569 Phone 800 635 9353 Toronto 6199A ...

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