Lincoln Electric WIRE-MATIC SVM 117-A User Manual
Wire-matic 250, Service manual, Svm 117-a
Table of contents
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