MK Products Cobra System III Gooseneck - Manual (Page 10)

Cobra Gooseneck Owner's Manual - 8/96 Page 5
OPERATION
1. GENERAL
The patented Cobra Gooseneck Torch maintains a constant, steady, uniform feed
speed, regardless of curved or looped wire conduit. The constant push exerted by
the slave motor in the cabinet, combined with the pull of the torch motor, causes the
wire to literally float friction-free through the wire conduit. The 24 volt DC torch motor
is controlled by a three (3) turn potentiometer in the torch handle.
The torch trigger is designed so that when it is partially depressed, gas flow starts via
the valve located in the torch body, prior to ignition of the arc. When the trigger is
partially released after welding (extinguishing the arc), gas flow continues until the
trigger is fully released; built-in pre and post gas flow.
2. POTENTIOMETER
The pot is located on the left hand side of the torch and provides three (3) turns of
rotation. A spacer is placed on the pot shaft before the pot is inserted into the
handle. A special pot nut and O-Ring provides drag on the knob and also secures
the pot to the handles.
3. MICRO SWITCH
The micro switch is wired “Normally Open” and secured to the torch block with two
(2) screws. An insulator between the torch block and micro switch prevents acciden-
tal shorting of the switch leads. The trigger pin reaches through the handle and
activates the micro switch just before the trigger bottoms out on the handle. The
micro switch lever may be adjusted to accomplish this.
4. MOTOR GEAR BOX
A 19.5:1 24VDC motor gear box is used on this version of the Gooseneck Torch.
The motor gear box attaches to the angle head with three (3) Allen screws. The
torch serial number is stamped on the angle head. There are no spare parts for the
motor gear box; it must be replaced as a whole.
5. LEAD ASSEMBLIES
Power Cable
Water-cooled torches use a bare #4 AWG power cable housed inside a flexible hose.
The torch fitting is screwed into the back of the torch block using a conductive
sealant. Because of the small cable used, these torches must be water-cooled.
Ultraflex torches, on the other hand, use a #2 AWG power cable which is secured to
the torch in the same manner. The power cable fitting on the end connects to the
power block inside the Cobramatic feeder.
Conduit
The Cobra Gooseneck comes standard with a teflon lined conduit. The torch end is
secured with a set screw accessable through a hole in the handles. Spiral steel
liners are available when using hard and cored wires.
Gas Hose
The gas hose is crimped to the inlet tube with a ferrule. The gas inlet tube is located
in the lower left of the torch when viewed from the rear.
Water-In Hose
The Water-In Hose is crimped to the inlet tube with a ferrule. The Water-In tube is
located in the upper right of the torch when viewed from the rear. Air cooled torches