33
MANUAL 0-2512
D. Wandering Arc, Poor Control of Arc Direction
1. Wrong size tungsten electrode, typically larger than recommended
a. Use proper size electrode for amperage selected (see Table 2,
page 30).
2. Improperly prepared tungsten electrode
a. Prepare tungsten properly.
3. Gas flow rate too high
a. Reduce flow rate.
4. Drafts blowing shielding gas away from tungsten electrode
a. Shield weld zone from drafts and check condition of
tungsten electrode.
5. Loose gas fitting on regulator or gas line drawing air into weld zone
a. Check and tighten all gas fittings.
6. Water in torch
a. Refer to torch parts list for part(s) requiring replacement
and repair torch as necessary.
E. No High Frequency at Torch When PROCESS SELECTOR SWITCH
is in HF TIG Position
1. PROCESS SELECTOR SWITCH is not in the HF TIG position
a. Place switch in HF TIG position.
2. Drafts blowing shielding gas away from tungsten electrode
a. Shield weld zone from drafts and check condition of
tungsten electrode.
3. Loose gas fitting on regulator or gas line drawing air into weld zone
a. Check and tighten all gas fittings.
4. Water in torch
a. Refer to torch parts list for part(s) requiring replacement
and repair torch as necessary.
5. Tungsten condition is poor
a. Replace electrode.
6. Electrode too high off metal
a. Reduce stand-off.
F. Lack of High Frequency; Difficulty in Establishing an Arc
1. Dissipation of high frequency from torch cable or conductive gas hose
a. Be sure that the torch cable is not near any grounded metal.
Do not use conductive gas hose.
2. Weld cable leakage
a. Check cables and torch for cracked or deteriorated
insulation or bad connections. Repair or replace necessary
parts.
3. Poor ground connection to power supply
a. Verify ground by trying to strike arc within one inch
(2.54 cm) of ground clamp.
G. Green AC POWER Indicator OFF; Fan Not Operating
1. Input line disconnect switch in OFF position
a. Place input line disconnect switch to ON position.
2. Power supply MAIN CIRCUIT BREAKER (MCB) in OFF position
a. Place MCB to ON position.
3. Input line breaker tripped/fuses blown
a. Check primary supply breaker or fuses and replace if
necessary.
BASIC TROUBLESHOOTING
Содержание 400GTS CC/TIG
Страница 16: ...14 MANUAL 0 2512 ...
Страница 40: ...38 MANUAL 0 2512 ...