4-18. Resistance Soldering.
General. In electrical resistance soldering, the heat is generated directly in the metal area to be soldered by using a
pair f carbon electrodes that grip the metal. An electrical current is passed from one electrode, through the metal and into
the other electrode and causing the metal to heat up.
Advantages. Resistance soldering is well adapted to any of the following conditions.
To eliminate a flame hazard and oxidation.
Where the port is inaccessible for soldering irons.
Where it is desired to restrict the heat to a selected portion of the assembly.
Resistance Soldering Equipment Setup (fig 4-45). Set up the resistance soldering unit as follows:
Plug the transformer power cord (9) into the foot petal (8)
Connect cord set (4) to cord set terminals (3).
Plug power cord (7) into a wall receptacle.
Place ON-OFF switch (2) to the ON position and press down on foot pedal (8) ; power light will come on.
Release foot pedal (8) ; power light will go out.
Turn transformer select knob (I) to the desired output setting.
Resistance Soldering A Cup Terminal (Fig. 4-45 and 4-46). A procedure for properly soldering a cup terminal is as
Strip insulation sleeving from the wire and clean the center conductor with alcohol.
Tin the wire as described in paragraph 4-16.
Place cup terminal in a vise at an approximate 60 degree incline from a straight up position.
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