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TradeWeld MIG250SA - Page 13

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12
DAILY CHECKING
WIRE FEED ASSEMBLY
Position
Checking keys
Remarks
Pressing
arm
Check that it is not over tightened and is
not melted / distorted
Leeds to wire slipping.
Wire
inlet
Tube
Check that there is no buildup of steel dust
in the tube(residue)
Clean the residue and check the reason and
solve it.
Wire diameter and the tube inner diameter
match
If not match, lead to unstable arc and residue.
Check that the tube lines up with the
center of the drive roll slot
If unmatched, leads to unstable arc and
residue.
Drive
Roll
Drive roll matches the wire size.
Check that slot is not blocked up
1. Leeds to unstable arc and residue, and
block wire tube.
2.Change new one if necessary
Pressure
wheel
Check the stability of its movement, and
wearing-out of pressure wheel(bearing)
Lead to unstable arc and wire slipping.
CABLE
Position
Checking keys
Remarks
Torch cable
1. If torch cable coiled or kinked.
2. If the Euro adaptor connector on the torch is
tight
1.Cause poor wire feeding
2. Unstable arc if cable coiled or
kinked.
Output
cable
1. Wearing-out of the cable insulated material.
2.Cable jack plug connector exposed (insulation
damage) or loose
3. Earth clamp not damaged or burnt, lug
tightened
Loose or bad connections get very
hot causing a drop in welding
amperage
220v Input
cable
1. Check if cable between the plug and the
machine is not damaged
2. Plug is in good condition
Replace damaged plugs with
correct amperage plug.

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