Change Polarity; Power Switch; Voltage Selectors; Wire Speed Control - Craftsman 196.205040 Manual Del Usuario

CHANGE POLARITY

This welder allows you the capability to
change the welding current polarity. You may
select either dc Straight (dc - Flux Cored) or
dc Reverse Polarity (dc + MIG). For welding
steel with solid wire, stainless steel, flux cored
hardfacing of steel, and silicon bronze welding
of steel, select dc Reverse Polarity (dc +
MIG). When using self-shielding, flux-core
steel wire, use dc Straight Polarity (dc - Flux
Cored).
Change the polarity of your welder according
to the following procedure steps. Figure 8
shows what the polarity block should look like
for each polarity setting.
WARNING
Electric shock can kill! Always turn the
power OFF and unplug the power cord from
the ac power source before changing polarity.
CAUTION
Do not use a ratchet, crescent or other lever
type wrench to tighten knobs on the polarity
block. The nuts must be hand tightened only.
Too much torque applied to one of the knobs
could cause the knob to break off.
1. Remove the retaining knobs from the +
and - mounting posts on the Gas/No Gas
Board, located just below the drive motor
on the inside of your welder.
A. For Gasless welding, mount the
Ground Clamp ring terminal to the "+"
mounting post and the Torch ring ter-
minal to the "-" mounting post.
B. For Gas (MIG) welding, mount the
Ground Clamp ring terminal to the "-"
mounting post and the Torch ring
terminal to the "+" mounting post.
See configuration shown in Figure 8.
Figure 8. Changing Polarity
16
2. Attach the ground clamp to the work
piece, making sure that it is cleaned of dirt,
oil, rust, scale, oxidation, and paint at the
point of connection.
Note: It is best to connect the ground clamp
directly to the work piece and as close to the
weld as possible. If it is impractical to con-
nect the ground clamp directly to the work
piece, connect it to metal that is securely
attached to the work piece, but not electrical-
ly insulated from it. Make certain this other
metal is of equal or greater thickness than
that of the workpiece.
CAUTION
Risk of electric component damage! If the
ground clamp is being connected to an auto-
mobile or other equipment with on-board
computer systems, solid state electronic con-
trols, solid state sound systems, etc., do not
weld until disconnecting the battery that is
attached to the chassis ground. Failure to do
so may result in electronic component dam-
age.