PRO-POINT 105I Manuel D'utilisateur page 18

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PROBLEM(S)
Lack of Penetration −
shallow fusion
between weld metal
and base metal
MIG WIRE FEED
PROBLEM(S) POSSIBLE CAUSE(S)
Inconsistent / 1. Wrong polarity selected.
interrupted
2. Incorrect wire speed setting.
wire feed
3. Voltage setting incorrect.
4. MIG torch lead kinked or too
sharp angle being held.
5. Contact tip worn, wrong size,
wrong type.
6. Liner worn or clogged (the
most common causes of bad
feeding).
7. Blocked or worn inlet guide
tube.
8. Wire misaligned in drive roller
groove.
9. Incorrect drive roller size.
10. Wrong type of drive roller
selected.
11. Worn drive rollers.
12. Drive roller pressure too high.
13. Too much tension on wire spool
hub.
14. Wire crossed over on the spool
or tangled.
15. Contaminated MIG wire.
APPENDIX A
18
PRO.POINT 105I MIG GAS/FLUX-CORED WELDER
POSSIBLE CAUSE(S)
1. Poor in incorrect joint
preparation.
2. Not enough heat input.
3. Contaminated base
metal.
SUGGESTED SOLUTION(S)
1. Material too thick. Joint preparation and design
needs to allow access to bottom of groove while
maintaining proper welding wire extension and arc
characteristics. Keep the arc at the leading edge of
the weld pool and maintain the gun angle at 5 and
15° keeping the stick out between 3/16 to 3/8 in.
2. Select a higher voltage range and /or adjust the wire
speed to suit Reduce travel speed.
3. Remove materials like paint, grease, oil and dirt,
including mill scale from base metal.
SUGGESTED SOLUTION(S)
1. Select the correct polarity for the wire being
used - see machine setup guide.
2. Adjust the wire feed speed.
3. Adjust the voltage setting.
4. Remove the kink, reduce the angle or bend.
5. Replace the tip with correct size and type.
6. Try to clear the liner by blowing out with
compressed air as a temporary cure, it is
recommended to replace the liner.
7. Clear or replace the inlet guide tube.
8. Locate the wire into the groove of the drive roller.
9. Fit the correct size drive roller eg; 0.030 in. wire
requires 0.030 in. drive roller.
10. Fit the correct type roller (e.g. knurled rollers
needed for flux cored wires).
11. Replace the drive rollers.
12. Can flatten the wire welding wire causing it to lodge
in the contact tip - reduce the drive roller pressure.
13. Reduce the spool hub brake tension.
14. Remove the spool untangle the wire or replace the
wire.
15. Use clean dry rust free wire. Do not lubricate the wire
with oil, grease etc.
For technical questions call 1-800-665-8685
V1.1