29
Power supply contactor becomes energized the
moment the torch trigger is depressed. Arcing can
occur if the wire is brought to a ground. Keep the
torch away from ground until welding is to begin
.
C. To start the weld, hold the torch so the welding wire is
approximately 1/4-in. from the work, then press the
torch trigger.
D. The welding wire should be pointed into the joint at
angles of approximately 45
0
for fillet welds, and approxi-
mately 90
0
for butt welds, (Fig 4.3.4.1).
E. The torch angle relative to the length of the weld should
be approximately 10
0
from the vertical (Fig. 4.3.4.2).
F. When welding in the vertical position, traveling either
up or down, it is very important to keep the arc on the
leading edge of the puddle to ensure complete pen-
etration.
G. Some welders who are accustomed to welding with
stick electrodes may tend to push the torch into the
weld. This is neither necessary nor desirable, since
the wire electrode is being mechanically fed into the
weld.
Please note that the Wire Speed control can be
adjusted for the gauge of metal to be welded.
How-
ever, the Coarse Voltage Range
and Fine Voltage
setting must not be switched while welding.
H. To stop the weld, release the trigger and pull the torch
from the work. When leaving equipment unattended,
always shut OFF and disconnect all input power and
shut off shielding gas at source.
TABLE 4.3, Continuous/Stitch Weld Conditions
Fig. 4.3.4.1 - Angle of Welding Wire with Joint
SECTION 4 OPERATION
Содержание MIGMASTER 250
Страница 1: ...F15 087 J 04 2003 MigMaster 250 Welding Package Instruction Manual...
Страница 4: ...4 TABLE OF CONTENTS...
Страница 22: ...22 SECTION 3 INSTALLATION...
Страница 38: ...38 Figure 5 3 Wiring Migmaster 250 for 208 230 V Model D 32861 F...
Страница 39: ...39 Figure 5 4 Wiring Migmaster 250 for 208 230 380 400 460 575 V Model D 33311 D...
Страница 40: ...40 SECTION 5 SERVICE...
Страница 52: ...52 SECTION 6 REPLACEMENT PARTS...
Страница 53: ...53 NOTES...
Страница 54: ...NOTES...
