MIDWEST FASTENERS CD80, Owner'S Manual

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8
©2001
MIDWEST FASTENERS, INC.
—
CD 80 Stud Welder
OVERVIEW – CD 80
CAPACITOR DISCHARGE
STUD WELDER
The CD 80 is a capacitor discharge stud welder. The weld energy is stored
in capacitors located inside the control unit. The amount of stored energy
can be controlled by rotating the voltage control knob located on the front
panel.
CD weld studs, or pins, used with the CD 80 must have a specially
designed projection at the weld end. When the stud is inserted into the weld
gun and placed against the workpiece, and the trigger switch is depressed,
the following occurs:
1. The energy stored in the capacitors travels through the weld cables to
the stud.
2. The rapid rise in current ignites the projection and allows a welding
arc to be established between the stud and the workpiece.
3. The arc melts the base of the stud and a portion of the workpiece.
4. The spring pressure inside the welding gun forces the stud into the
molten metal pool created by the arc.
5. The cycle ends upon contact of the stud to the workpiece.
6. The welding gun is then removed. Upon removal, the controller will
automatically recharge to the set voltage.
CAUTION
The noise generated by stud welding
may exceed allowable levels
established by O.S.H.A. For this reason
it is recommended that proper ear protection be worn
by the operator and anyone working in the immediate area.
WARNING
Voltages inside the unit can reach 200 volts D.C.
even if the unit is turned off . All repair work
should be handled by factory trained personnel.
HIGH VOLTAGE
HEARING
PROTECTION