MK Products Cobramatic 120VAC - Manual (Page 10)

Cobramatic ® Owner’s Manual - page 3
To change this setting, it is easier done without the spool of wire on the spin-
dle. Remove the wire spool retainer and re-install it reversed back onto the
Spindle Tension Knob (Fig. 3). In the “Tool Mode”, the square shaped end of
the retainer fi ts onto the Knob. Grab the retainer and turn in the COUNTER-
CLOCKWISE direction until it stops. The Knob is now set to the OUT posi-
tion (.030/.035 AL Only).
To reset the Knob back to the factory setting of All Other Wires, use the
retainer as described above, and turn in the CLOCKWISE direction until it
stops. The Knob is now set to the IN position. Turning the retainer and
Knob in this direction may require more effort, since turning CLOCKWISE is
working against a spring.
Load wire spool onto spindle according to the previous instructions.
Replace the spool retainer nut.
Lower the wire retainer bar onto the spool.
Threading Procedure
Place wire size selector switch on front panel to the correct position for the
wire being used.
Loosen end of wire from spool and cut off any kinked or bent portions.
Unreel and straighten out fi rst 6” to 8” of wire.
Raise wire type lever to center position.
Route wire into inlet guide, along drive roll groove, and into wire conduit.
Flip wire type lever to show type of wire being used.
Tighten the torch pressure adjusting knob so the wire will be picked up and
fed through the contact tip. Proper tension is achieved when wire does not
slip if a small amount of pressure is added to the wire as it exits the tip.
Wire Retainer Bar
The design of the patented Cobramatic® Wire Retainer Bar performs two
very important and very basic functions of the wire feeder: a) spool drag
tension, and b) wire maintenance on the spool.
The spool drag tension is set by lowering the wire retainer bar onto the wire
inside of the spool. The spring tension of the wire retainer bar applies enough
pressure on the spool so that when the torch trigger is released, engaging the
brake pall, the spool does not overrun kicking wire off the spool.
Wire maintenance on the spool is performed by the applied pressure of the
wire retainer bar spread across the coiled wire on the spool. The replaceable
pad (P/N 437-0255) of the wire retainer bar is designed to hold the wire on
the spool, maintaining the smooth layering of the wire and keeping it from
jumping off, and possibly, electrically shorting to the cabinet chassis.
Wire Spool Retainer In "Tool Mode";
used to change spindle drag.
Figure 3