Miller W-250V(WP-20V) 소유자 매뉴얼 - 페이지 17
{카테고리_이름} Miller W-250V(WP-20V)에 대한 소유자 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Miller W-250V(WP-20V) 25 페이지. W-250 / wp-20 series hand-held water-cooled tig (gtaw) torch
페이지 인쇄
Trouble
Excessive tungsten electrode con-
sumption.
Wandering arc
Yellow powder or smoke on cup.
Erratic arc
Porosity in weld.
Select proper size and type tungsten. Properly prepare tungsten according to Section 6.
Check polarity setting on welding power source (see welding power source Owner's manual).
Check for proper gas flow rate. Check manufacture's recommendations.
If torch is water cooled, check torch and cables for water leaks. Repair or replace if necessary (see Sec-
tion 5-1).
Shield weld zone from drafts.
Reduce gas flow rate.
Select proper size and type tungsten. Properly prepare tungsten according to Section 6.
When using AC, check welding power source High Frequency control setting, and increase setting if nec-
essary.
Use proper type shielding gas.
Check for proper gas flow rate. Check manufacture's recommendations.
Increase postflow time.
Check torch cup size. Match cup size to joint being welded.
When using DC, check polarity, and/or polarity of welding cables.
When using AC, check welding power source High Frequency control setting, and be sure it is operating
continuously.
Select proper size and type tungsten. Properly prepare tungsten according to Section 6.
Use proper arc length. Arc length may be too long or too short.
Make sure base material is clean and free of contaminates.
When using AC, slow travel speed can cause erratic arc. Adjust travel speed.
Check for proper gas flow rate. Check manufacture's recommendations.
Check and tighten gas fittings.
Make sure base material and filler material is clean and free of contaminants.
Check for impurities and moisture in gas lines. Purge if necessary.
If torch is water cooled, check torch and cables for water leaks. Repair or replace if necessary (see Sec-
tion 5-1).
Remedy
OM-225 425 Page 13