MK Products Cobra Gold Gooseneck - Manual (Page 10)

Cobra Gold Owner's Manual - Page 5
Controls and Settings
Potentiometer
The potentiometer is located on the left hand side of the torch and provides
three (3) turns of adjustment. A special pot nut and O-Ring provides drag on
the knob and also secures the pot to the handle.
Trigger, Gas Valve and Micro Switch
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.
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 accidental 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.
Drive Roll and Idler Rolls
General
The Gooseneck torch comes standard with knurled drive rolls, which will
handle wire diameters from .023 through 1/16 inch. Optional insulated
V-groove drive rolls are also available for improved feeding of aluminum wire
(see Optional Kits).
Drive roll tension is accomplished by means of a pressure-adjusting screw
located on the left hand side of the torch. 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.
----------- IMPORTANT -----------
NOTE: Over-tightening of the drive rolls will cause excessive knurling and/or
deformation of the wire. When the complete system is setup properly,
feeding wire out of the end of the torch and letting fall on the ground should
form a large uniform circle. If it forms a spiral or spring then there is too
much tension in the system, please refer to the Cabinet Owners Manual for
adjustment to the tension setting.
INCORRECT DRIVE ROLL TENSION IS THE NUMBER ONE
CAUSE OF POOR WIRE FEED PERFORMANCE
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Section B
(Cont.)