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10

Faul

FI

n

DI

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G

Description

Possible cause

Remedy

Non-metallic particles 

are trapped in the weld 

metal (slag inclusion).

a) Non-metallic particles 

may be trapped in 

undercut from previous 

run
(b) Joint preparation too 

restricted
(c) Irregular deposits 

allow slag to be trapped.
(d) Lack of penetration 

with slag trapped 

beneath weld bead.
(e) Rust or mill scale is 

preventing full fusion.
(f) Wrong electrode for 

position in which welding 

is done.

a) If bad 

undercut 

is present, 

clean slag 

out and 

cover with 

a run from 

a smaller 

diameter 

electrode.
(b) Allow for 

adequate 

penetration 

and room for 

cleaning out 

the slag
(c) If very 

bad, chip 

or grind out 

Irregularities
(d) Use 

smaller 

electrode 

with sufficient 

current 

to give 

adequate 

penetration. 

adequate 

penetration. 

Use suitable 

tools to 

remove all 

slag from 

corners
(f) Use 

electrodes 

designed 

for position 

in which 

welding 

is done, 

otherwise 

proper 

control 

of slag is 

difficult.

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

Description

possible Cause

Remedy

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

 Dirty weld pool (a) Electrode 

contaminated through 

contact with work piece 

or filler rod material

(b) Gas contaminated 

with air

(a) Clean the elec-

trode 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

Содержание XTT-182 DV

Страница 1: ...Operator Manual ISSUE 1 XTT 182 DV...

Страница 2: ...maintenance this equipment should provide years of reliable service All our systems conform to ISO9001 2008 and are independently audited by NQA The entire product range carries the CE mark and is co...

Страница 3: ...3 Input and grounding connection 6 5 4 Output Polarity Connections 7 5 5 Torch Installation 7 5 6 Work return lead connection 7 6 0 Operation 7 6 1 MMA Welding guide 7 6 2 Basic TIG welding guide 7 7...

Страница 4: ...ealth FUMES AND GASES can be hazardous Keep your head out of the fumes Do not breathe the fumes If inside ventilate the area and or use local forced ventilation at the arc to remove welding fumes and...

Страница 5: ...g Wear approved ear protection if noise level is high Shielding gas cylinders contain gas under high pressure CYLINDERS can explode if damaged Protect compressed gas cylinders from excessive heat mech...

Страница 6: ...commend you retain the packaging until the machine has been fully installed and tested incase it has been damaged in transit and has to be returned to the re seller 5 2 Location Be sure to locate the...

Страница 7: ...of slow cooling from high temperatures is enbrittlement For this reason it is absolutely essential to keep manganese steel cool during welding by quenching after each weld or skip welding to distribu...

Страница 8: ...teel Pure Argon Stainless steel Pure Argon Nickel alloy Pure Argon Copper Pure Argon Titanium Pure Argon Machine setup for TIG welding DC TIG welding 1 Connect the torch to the connection and the gas...

Страница 9: ...Cooling rate is too high a Redesign to relieve weld joint of severe stresses or use crack resistance electrodes b Travel slightly slower to allow greater build up in throat c Preheat plate and cool sl...

Страница 10: ...d 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 excessiv...

Страница 11: ...off d Have a qualified service engineer repair the connection Maximum output welding current cannot be achieved with nominal mains supply voltage Defective control circuit Have a qualified service en...

Страница 12: ...www parweld com FAULT FINDING 12...

Страница 13: ...Fitted with 5 8 BSP inlet connections Stock Code Description Maximum Outlet Pressure E700140 Argon Preset Regulator 3 0 Bar E700141 Argon Indicator Regulator 3 0 Bar E700113 1 Gauge Argon 30 lpm flow...

Страница 14: ...www parweld com 14 PRO26 and PRO26FX Air Cooled PRO Grip MAX TIG Welding Torch B 2 3 11 12 13 4 5 10 9 7 6 8 14 15 16 C D E A 1 18 17 1 A F G H I J 1 A K L ACCESSORY...

Страница 15: ...Code Description H 45V29 Gas Lens Body 0209 0 5mm Bore 45V24 Gas Lens Body 0409 1 0mm Bore 45V25 Gas Lens Body 1 169 1 6mm Bore 45V26 Gas Lens Body 3 329 2 4mm Bore 45V27 Gas Lens Body 1 89 3 2mm Bore...

Страница 16: ...d to ensure material contents as per the list below Cadmium 0 01 by weight Lead 0 1 by weight Mercury 0 1 by weight Hexavalent chromium 0 1 by weight Polybrominated biphenyl s pbbs 0 1 by weight Polyb...

Страница 17: ...no other warranty express or implied This warranty is exclusive and in lieu of all others including but not limited to any warranty of merchantability or fitness for any particular purpose Limitation...

Страница 18: ...Parweld Limited Bewdley Business Park Long Bank Bewdley Worcestershire England DY12 2TZ tel 44 1299 266800 fax 44 1299 266900 www parweld com info parweld co uk...

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