Weld Problems - FCW DYNA POWER 503CV Operating Manual

7.03

Weld Problems

Fault
1. Undercut
2. Lack of penetration
3. Lack of fusion
4. Excessive spatter
5. Irregular weld shape
6. Welding cracking
7. Cold weld puddle
DYNA POWER 350CV、503CV、500CV、630CV、630HCV Operating Manual
Cause
A Welding arc voltage too high.
B Incorrect gun angle.
C Excessive heat input.
A Welding current too low.
B Joint preparation too narrow
or gap too tight.
C Shielding gas incorrect.
Voltage too low.
A Voltage too high.
B Voltage too low.
A Incorrect voltage and current
settings.
Convex, voltage too low.
Concave, voltage too high.
B Wire is wandering.
C Incorrect shielding gas.
D Insufficient or excessive heat
input.
A Weld beads too small.
B Weld penetration narrow and
deep.
C Excessive weld stress.
D Excessive voltage.
E Cooling rate too fast.
A Faulty rectifier unit.
B Loose welding
connection.
C Low primary voltage.
A Reduce voltage by reducing the voltage
selection switches position or increase the
wire feed speed.
B Adjust angle.
C Increase the gun travel speed and/ or
reduce welding current by reducing the
voltage selection switches position or
reducing the wire feed speed.
A Increase welding current by increasing
wire feed speed and increasing voltage
selection switch position.
B Increase the joint angle or gap.
C Change to a gas which gives higher
penetration.
Increase
selection switch position.
A Lower voltage by increasing wire speed
control or reducing the voltage selection
switches.
B Raise voltage by reducing wire speed
control or increasing the voltage selection
switches.
A Adjust voltage and current by adjusting
the voltage selection switches and the
wire speed control.
B Replace the contact tip.
C Check shielding gas.
D Adjust the wire speed control or voltage
selection switches.
A Decrease the travel speed.
B Reduce current and voltage and increase
MIG gun travel speed or select a lower
penetration shielding gas.
C Increase weld metal strength or revise
design.
D Decrease the voltage by reducing the
voltage selection switches.
E Slow the cooling rate by preheating part to
be weld or cool slowly.
A Have an accredited FCW service agent to
cable test then replace the faulty component.
B Check all welding cable connections.
C Contact supply authority.
Table 9
- 22 -
Remedy
voltage by increasing voltage