Parweld XTI-201, Instruction Manual

www.parweld.com

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

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

Weld bead 

too wide 

and flat or 

undercut 

at edges 

of weld or 

excessive 

burn 

through

Welding current is 

too high

Decrease weld 

current

Weld bead 

too small or 

insufficient 

penetration 

or ripples 

in bead 

are widely 

spaced 

apart

Travel speed too 

fast

Reduce travel 

speed

Weld bead 

too wide or 

excessive 

bead build 

up or 

excessive 

penetration 

in butt joint

Travel speed too 

slow

Increase travel 

speed

Uneven leg 

length in 

fillet joint

Wrong placement 

of filler rod

Re-position filler 

rod

Electrode 

melts when 

arc is struck

Electrode is 

connected to the 

‘+’ terminal

Connect the 

electrode to the 

‘-‘ terminal

Description Possible Cause

Remedy

 Dirty weld 

pool

(a) Electrode 

contaminated 

through contact 

with work piece or 

filler rod material
(b) Gas contami-

nated with air

(a) Clean the 

electrode by 

grinding off the 

contaminates 
(b) Check gas 

lines for cuts 

and loose fitting 

or change gas 

cylinder

Electrode 

melts or 

oxidizes 

when an arc 

is struck

(a) No gas flowing 

to welding region
(b) Torch is clogged 

with dust
(c) Gas hose is cut
(d) Gas passage 

contains impurities
(e) Gas regulator is 

turned off
(f) Torch valve is 

turned off
(g) The electrode 

is too small for the 

welding current

(a) Check the 

gas lines for 

kinks or breaks 

and gas cylinder 

contents
(b) Clean torch
(c) Replace gas 

hose
(d) Disconnect 

gas hose from 

torch then raise 

gas pressure 

to blow  out 

impurities.
(e) Turn on
(f) Turn on
(g) Increase 

electrode 

diameter or 

reduce the 

welding current

Poor weld 

finish

Inadequate 

shielding gas

Increase gas 

flow or check 

gas line for gas 

flow problems

Arc flutters 

during TIG 

welding

(a) Tungsten 

electrode is too 

large for the 

welding current
(b) Absence of 

oxides in the Weld 

pool.

(a) Select 

the right size 

electrode. Refer 

to basic TIG 

welding guide.
(b) Refer basic 

TIG welding 

guide for ways 

to reduce arc 

flutter

Faul

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