04 welding problems, 04 welding problems -5, Fabricator 210 – Tweco 210 MIG Thermal Arc Fabricator User Manual

Page 59

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FABRICATOR 210

Manual No. 0-4855

5-5

SERVICE

5.04 Welding Problems

FAULT

CAUSE

REMEDY

A. Undercut.

1. Welding arc voltage
too high.

a. Reduce voltage by reducing the voltage

selection switch position or increase the
wire feed speed.

2. Incorrect torch
angle

a. Adjust angle

3. Excessive heat
input

a. Increase the torch travel speed and/or

reduce welding current by reducing the
voltage selection switch position or
reducing the wirefeed speed.

4. Weld speed too fast

a. Reduce weld speed.

B. Lack of penetration. 1. Welding current too

low

a. Increase welding current by increasing

wire feed speed and increasing voltage
selection switch position.

2. Joint preparation too

narrow or gap too
tight

a. Increase joint angle or gap

3. Shielding gas

incorrect

a. Change to a gas which gives higher

penetration

4. Weld speed too fast

a. Reduce weld speed.

C. Lack of fusion.

1. Voltage too low

a. Increase voltage by increasing voltage

selection switch position.

2. Weld speed too fast

a. Reduce weld speed.

D. Excessive spatter. 1. Voltage too high

a. Lower voltage by reducing the voltage

selection switch or increase wirespeed
control.

2. Voltage too low

a. Raise voltage by increasing the voltage

selection switch or reduce wirespeed
control.

3. Weld speed too fast

a. Reduce weld speed.

E. Irregular weld

shape.

1. Incorrect voltage and

current settings.
Convex, voltage too
low. Concave, voltage
too high.

a. Adjust voltage and current by adjusting

the voltage selection switch and the
wirespeed control.

2. Wire is wandering

a. Replace contact tip

3. Incorrect shielding

gas

a. Check shielding gas.

4. Insufficient or

excessive heat input

a. Adjust the wire speed control or the

voltage selection switch.

5. Weld speed too fast

a. Reduce weld speed.

Table 5-3a: Welding Problems and Solutions

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