Miller Auto-Axcess E Digital, Owner'S Manual

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General
OM-257 675 Page 45
9-10. 30 Points Of Mechanics In MIG Welding
1. Check primary power connection at line disconnect switch or receptacle and/or cord plug.
2. Check primary power connection at welding power source.
3. Check secondary weld output connections at welding power source.
4. Inspect condition and routing of positive weld cable to wire drive motor.
5. Check connection of positive weld cable to wire drive motor.
6. Inspect condition and routing of negative weld cable to fixture.
7. Check connection of negative weld cable to fixture.
8. Inspect condition of any rotary grounds, grounding shoes or other auxiliary grounds.
9. Check gas hose connection to shielding gas supply regulator.
10. Check shielding gas flow rate.
11. Check gas hose routing.
12. Check gas hose connection at wire drive housing.
13. Inspect condition of dereeler. Check for wear at quick-connect coupling and replace if necessary.
14. Check placement of payoff pack or drum for smooth feed path.
15. Inspect condition and routing of input conduit.
16. Check installation of quick-connect coupling at rear of wire drive so that it does not contact drive rolls. Check for wear and replace if necessary.
17. Check drive rolls and replace if worn.
18. Check for drive roll tension setting.
19. Check intermediate guide for proper size to match wire size and replace if worn.
20. Check gun connection at wire drive and be sure O − rings seal at drive housing.
21. Check installation, routing and condition of welding gun.
22. Check for proper length of liner at both ends and be sure it is cut without burrs.
23. Check liner for proper size to match wire size.
24. Check liner for wear and clean out to prevent plugging.
25. Check contact tip for proper size to match wire size.
26. Check contact tip for wear and change at regular intervals.
27. Check contact tip for a tight fit and secure installation at gun.
28. Check condition of gas diffuser.
29. Check condition of nozzle.
30. Check O-ring for proper sealing at nozzle.