Panasonic YC-300BP2YAF, Operating Instructions Manual

Page: 58 / 64

Appendix
OMCTT5639E09
58
11.1.2 Tungsten welding rod

As for the selection of tungsten welding rod diame -
ters, refer to the following table.

In the range of welding current for electrode minus
(DCEN), the lowest value shows the minimum ser
-
vice current for YWP welding rod, and the highest
value shows the maximum service current for
YWTh-2 welding rod.

YWP: Pure tungsten. YWTh-2: 2% thoriated tung -
sten

If arc is not stable in the low current range, refer to
section “Troubleshooting.”
11.1.3 TIG welding shield gas

As for the TIG welding shield gas, use the welding
argon gas.

The incorporation of impurities, such as oxygen,
moisture, nitrogen, etc. into the argon gas, can be
a cause to blowholes, and reduces the quality of
welding. (In AC TIG and MIX TIG, the cleaning
activities also become less efficient, and the weld -
ing quality in bead appearance, penetration, etc. is
considerably affected.)
11.1.4 Filler wire

For the filler wire, material, which is same as base
material, is used in general. In special cases
including the welding of different metal, etc., select
material depending on your purposes.

As for the diameter of filler wire, an appropriate
thickness is decided depending on the welding
current in general.
Guideline for selecting filler wire diameter
Welding
rod size
(Dia.)
(mm

)
Welding current (A)
AC DC
YWP YWTh-2
Electrode minus (-)
(DCEN)
Electrode plus
(+)(DCEP)
YWP
YWTh-2
YWP
YWTh-2
0.5 5 - 15 5 - 20 5 - 20
1.0 10 - 30 10 - 40 15 - 80
1.6 20 - 100 20 - 100 70 - 150 10 - 20
2.4 60 - 130 60 - 180 150 - 250 15 - 30
3.2 100 - 160 120 - 240 250 - 400 25 - 40
4.0 130 - 240 160 - 380 400 - 500 40 - 55
4.8 170 - 300 180 - 360 500 - 800 55 - 80
Welding current (A) Filler wire size (Dia.) (mm  )
10 - 20 - 1.0
20 - 50 - 1.6
50 - 100 1.0 - 2.4
100 - 200 1.6 - 3.0
200 - 300 2.4 - 4.5