15
1) Welding current setting
Set the welding current after the above preparation. Short circuiting transfer is mainly fit for electrode
wires of diameter 0.6~1.2mm. As a guide for short circuit welding set the welding current according to
the table below.
2) Welding speed selecting
The welding quality and productivity should be taken into consideration for the selecting of welding
speed. In the case that the welding speed increases, it weakens the protection effect and quickens the
cooling. As a consequence, it is not good for weld bead shaping. In the event that the speed is too slow,
the work-piece will be burned through, and a good weld bead will be unavailable. In practical operation,
the welding speed should not exceed 50cm/min.
3) Wire Stick-out
The increase of the stick-out can improve the productivity, but too long stick-out may lead to excessive
spatter, wire breaking and unstable welding. Generally, the stick-out should be 10 times as the welding
wire diameter.
4) Shield gas flow selection
The protection effect is the primary consideration. Besides, the protection effect of inner-angle welding
is better than that of external-angel welding, so the gas flow in inner-angle welding should be lower.
Less or no shield gas is needed in FCAW. Refer to the table below for the recommended gas flow rates.
0.8
50~120
70~100
Wire Diameter (mm)
Welding Current Range (A)
Optimal Current (A)
1.0
70~180
80~120
1.2
80~350
100~200
Gas Flow (L/m)
5~15
15~20
20~2
Welding Mode
Welding with thin wire
Welding with thick wire
Welding with thick wire
under high current
Summary of Contents for MTS250 TSX1D250MTS
Page 19: ...Notes ...
