Migomag SIM 200 LCD
Model No ASIM200LCD
24
A good starting point for angle B is about 30 degrees DOWN from being perpendicular to
the work piece.
VERTICAL POSITION is easier for many people to Pull the torch from top to bottom. It can
be difficult to prevent the puddle from running downward. Pushing the torch from bottom
to top may provide better puddle control and allow slower rates of travel speed to achieve
deeper penetration. When vertical welding, angle B (see HOLDING THE TORCH) is usually
always kept at zero, but angle A will generally range from 45 to 60 degrees to provide
better puddle control.
OVERHEAD POSITION is the most difficult welding position. Angle A (see HOLDING THE
TORCH) should be maintained at 60 degrees. Maintaining this angle will reduce the chances
of molten metal falling into the nozzle. Angle B should be held at zero degrees so that the
wire is aiming directly into the weld joint. If you experience excessive dripping of the weld
puddle, select a lower heat setting. Also, the weave bead tends to work better than the
stringer.
6.4 Multiple pass welding
Butt Weld Joints When butt welding thicker materials you will need to prepare the edges of
the material to be joined by grinding a bevel on the edge of one or both pieces of the metal
being joined. When this is done, a “V” is created between the two pieces of metal that will
have to be welded closed. In most cases more than one pass or bead will need to be laid
into the joint to close the “V”.
Laying more than one bead into the same weld joint is known as a multiple-pass weld.
The illustrations in following figure show the sequence for laying multiple pass beads into a
single “V” butt joint.
