Lincoln Electric WIRE-MATIC SVM 117-A User Manual
Wire-matic 250, Service manual, Svm 117-a
WIRE-MATIC 250
SERVICE MANUAL
Sales and Service through Subsidiaries and Distributors Worldwide
22801 St. Clair Ave. Cleveland, Ohio 44117-1199 U.S.A. Tel. (216) 481-8100
World's Leader in Welding and Cutting Products
Premier Manufacturer of Industrial Motors
SVM 117-A
December 1995
Safety Depends on You
Lincoln arc welding and cutting
equipment is designed and built
with safety in mind. However,
your overall safety can be
increased by proper installation
... and thoughtful operation on
your part. DO NOT INSTALL,
OPERATE OR REPAIR THIS
EQUIPMENT WITHOUT READ-
ING THIS MANUAL AND THE
SAFETY PRECAUTIONS CON-
TAINED THROUGHOUT. And,
most importantly, think before you
act and be careful.
For use with machines having Code Numbers:
WIRE-MATIC 250
20
18
16
14
22
24
26
28
VOLTS
300
250
200
150
350
400
450
500
WIRE SPEED
100
550
50
600
1
ON
0
OFF
9799,
9800,
10003,
10004.
RETURN TO MAIN INDEX
Document Outline
- Master TOC
- Safety
- Section A Installation
- Section B Operation
- Section C Accessories
- Section D Maintenance
- Section E Theory of Operation
- Section F Troubleshooting & Repair
- Symptoms
- Major Physical or Electrical Damage is Evident
- Machine is dead- No Open Circuit Voltage output and No Wire Feed when gun trigger is pulled.
- No Open Circuit Voltage output but wire feeds normally when gun trigger is pulled.
- Wire feeds but welding output is low causing wire to "stub". Welds are "cold". Machine cannot obtain full...
- The output voltage and wire feed is present continuously or pulsing when gun trigger is NOT activated.
- No control of arc voltage. Wire feeding is normal.
- There is no gas flow when gun trigger is pulled. Wire feeds and weld voltage is present.
- The machine stops feeding wire while welding.
- No control of wire feed speed. Other machine functions are normal.
- There is no wire feed when gun trigger is pulled. Normal open circuit voltage is present.
- The arc is unstable and or "hunting".
- Weld bead is narrow or ropy. May have porosity with electrode stubbing into plate.
- The contact tip seizes in the gas diffuser.
- The welding arc is variable and sluggish.
- The arc striking is poor.
- Section G Electrical Diagrams