E-3
TROUBLE SHOOTING
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility
for technical troubleshooting assistance before you proceed.
CAUTION
SQUARE WAVE
®
TIG 200
PROBLEM
POSSIBLE CAUSE
RECOMMENDED
COURSE OF ACTION
Arc “Flutters” when TIG
welding.
1. Tungsten electrode may be too large in diameter for the current
setting.
Contact your Local
Lincoln
Authorized Field Service
Facility
for technical
troubleshooting assistance.
2. Tungsten not prepared properly - should have slight blunt.
3. Gas shielding may be insufficient. Increase gas flow; reduce
tungsten stickout beyond gas cup.
4. Check for contaminated gas or leaks in the gas line, torch, or
connections
5. If a helium blend is used as a shielding gas, then reduce the
percentage of helium.
Arc “Pulsates” when TIG
welding
1. Check to see if the Pulse feature is active.
Black areas along weld bead.
1. Clean any oily or organic contamination from the work piece.
2. Tungsten electrode may be contaminated. Replace or sharpen.
3. Check for contaminated gas or leaks in the gas line, torch, or
connections
4. Gas shielding may be insufficient. Increase gas flow; reduce
tungsten stickout beyond gas cup.
Weak high frequency -
machine has normal welding
output.
1. Check for poor connections in the welding circuit.
2. Gas shielding may be insufficient. Increase gas flow; reduce
tungsten stickout beyond gas cup.
3. Check for work and torch cables in poor condition allowing high
frequency to “Leak Off”.
4. Keep cables as short as possible.
High frequency “spark” is
present at tungsten electrode,
but operator is unable to
establish a welding arc.
Machine has normal open
circuit voltage (refer to
Technical Specifications in
the Installation Chapter).
1. The tungsten electrode may be contaminated. Replace or sharpen.
2. The current control may be set too low.
3. The tungsten electrode may be too large for the process.
4. If a helium blend is used as a shielding gas, then reduce the
percentage of helium.
5. Tungsten is too far from the workpiece when starting.
Содержание Square Wave TIG 200
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Страница 76: ...P 896 C jpg Case Front Assembly 6 Square Wave TIG 200 12475 Printed 10 01 2015 at 09 18 46 Produced by Enigma ...
Страница 81: ...P 896 E jpg Wraparound Assembly Square Wave TIG 200 12475 11 Printed 10 01 2015 at 09 18 46 Produced by Enigma ...