Tweco 200 ACDC Arcmaster(April2006) - Manual (Page 49)

ARCMASTER 200 AC/DC
April 13, 2006 10-1
SECTION 10:
BASIC TROUBLESHOOTING
WhARNING
There are extremely dangerous voltages and power levels present inside this product. Do not attempt to
open or repair unless you are an accredited Thermal Arc Service Agent and you have had training in power
measurements and troubleshooting techniques.
If major complex subassemblies are faulty, then the Welding Power Source must be returned to an accredited
Thermal Arc Service Agent for repair.
The basic level of troubleshooting is that which can be performed without special equipment or knowledge.
10.01 TIG Welding Problems
Weld quality is dependent on the selection of the correct consumables, maintenance of equipment and proper
welding technique.
Description Possible Cause Remedy
1 Excessive bead build-up
or poor penetration or
poor fusion at edges
of weld.
Welding current is too low. Increase weld current and/or
faulty joint preparation.
2 Weld bead too wide and
flat or undercut at edges
of weld or excessive
burn through.
Welding current is too high. Decrease weld current.
3 Weld bead too small or
insufficient penetration or
ripples in bead are widely
spaced apart.
Travel speed too fast. Reduce travel speed.
4 Weld bead too wide or
excessive bead build up
or excessive penetration
in butt joint.
Travel speed too slow. Increase travel speed.
5 Uneven leg length in
fillet joint.
Wrong placement of filler rod. Re-position filler rod.
Table 10-1: TIG Welding Problems