Change Polarity; Set The Wire Drive Tension - Craftsman 196.205690 Owner's Manual

job. The VOLTAGE selector controls the
weld heat.
There are four voltage heat
selections (lettered A through D) available
on this welder. Position A provides the
lowest voltage (heat) and position D the
highest voltage (heat).
15. Set the WIRE SPEED control to the
middle of the wire speed range.
16. Straighten the gun cable and pull the
trigger on the welding gun to feed the
wire through the gun assembly.
17. When at least an inch of wire sticks out
pa,._tthe end of the gun, release the
trigger.
18. Select a contact tip stamped with the
same diameter as the wire being used. If
stamped in metric see DESCRIPTION.
Note: Due to inherent variances in flux-cored
welding wire, it may be necessary to use a
contact tip one size larger than your flux core
wire if wire jams occur.
19. Slide the contact tip over the wire
(protruding from the end of the gun).
Thread the contact tip into the end of the
gun and hand-tighten securely.
20. Install the nozzle on the gun assembly.
For best results, coat the inside of the
nozzle with anti-stick spray or gel.
21. Cut off the excess wire that extends past
the end of the nozzle.
SET THE WIRE DRIVE TENSION
To reduce the risk of arc flash, make certain
that the wire coming out of the end of the
gun does not come in contact with work
piece, ground clamp or any grounded materi-
al during the drive tension setting process or
arcing will occur.
.
2.
Pull the trigger on the gun.
Turn the drive tension adjustment knob
clockwise, increasing the drive tension
until the wire seems to feed smoothly
without slipping.
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 followi_lg procedure steps. Figure 6
shows what the polarity block should look like
for each polarity setting.
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 theTorch ring
terminal to the "+" mounting post.
See configuration shown in Figure 8.
NO
GAS GAS
Figure 8. Changing Polarity
15