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AMI 21 - Troubleshooting; Meandering Weld; Misalignment

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M O D E L 2 1
O P E R A T
I O N M A N U A L
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6.0 TROUBLESHOOTING
TROUBLE
SHOOTINGTROUBLESHOOTING
TROUBLESHOOTING
6.1 MEANDERING WELD
Welds beads that are not straight can usually be attributed to one of four things:
1. Incorrect purge flow, set flow to 15-25 CFH and retest.
2. Worn electrode, replace and retest.
3. Incorrect pressure between the contact strip and the rotor.
4. Worn rotor gear/race.
If steps 1 and 2 above did not solve the problem, follow the procedures shown in the
Section 5.3 with detail to:
1. Condition of the wave springs in the stationary insulator.
2. Wear on the contact strip.
3. Wear on the rotor gear and race (check for excessive axial play).
4. Replace worn parts.
6.2 MISALIGNMENT
To correct misalignment you must first identify what is causing th
e misalignment:
1. Carefully inspect each collet and jaw.
2. Check the tube clamping surfaces for irregularities.
3. Check the angled collet and jaw seats for irregularities.
4. Check the retaining pins and pockets for irregularities.
5. If any issues are found, correct or replace the part and check alignment.
6. Clamp on the calibration pieces.
7. Look through the pieces noting any irregularities in the joint between the two.
Misalignment similar to Fig 1 indicates that side 1 is over clamping, either loosen
the clamping adjustment screw or increase the air pressure.
Misalignment similar to Fig 2 indicates that side 2 is over clamping, either tighten
the clamping adjustment screw or reduce the air pressure.
Chapter
6