V4.0
200A Multi-Process Welder with LCD Display
8785115
Visit www.princessauto.com for more information
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Problem(s)
Possible Cause(s)
Suggested Solution(s)
Lack of Fusion −
failure of weld metal
to fuse completely
with base metal or a
proceeding weld
bead
1. Contaminated
base metal.
2. Not enough
heat input.
3. Improper
welding
technique.
1. Remove materials like paint, grease,
oil and dirt, including mill scale from
base metal.
2. Select a higher voltage range and /or
adjust the wire speed to suit.
3. Keep the arc at the leading edge of the
weld pool. Torch angle to work should
be between 5 and 15°. Direct the arc at
the weld joint Adjust work angle or
widen groove to access bottom during
welding. Momentarily hold arc on side
walls if using weaving technique.
Excessive
Penetration − weld
metal melting
through base metal
Too much heat. Select a lower voltage range and/or adjust
the wire speed to suit increase travel
speed.
Lack of Penetration −
shallow fusion
between weld metal
and base metal
1. Poor in
incorrect joint
preparation.
2. Not enough
heat input.
3. Contaminated
base metal.
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 torch angle
at 5 and 15°.
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.
