Abstract: An apparatus and a method for controlling the exciter current in a welding generator such that the open circuit voltage of the generator is regulated within suitable limits prior to arc start. A voltage controlled relay is connected to the generator's output and controls the inclusion of a voltage regulated biasing circuit in the base circuit of a transistor connected in series in the exciter circuit to assure that when the voltage exceeds a preset level of the voltage controlled relay, the exciter current will remain substantially constant.

Abstract: A system and method for controlling a welding program during arc initiation wherein the output current of a welding power supply is dropped in manner such that the generator excitation is limited, or the diode of a rectified machine is controlled, as the case may be, accordingly as the electrode or weld wire is motivated downwardly via a feed motor toward a work or cooperating electrode under a condition of low voltage and no current drain, to the end of precluding sticking or adhering of the electrode to the work upon initial contact therewith. Upon contact, and with generator current output at such a minimal value that the electrode will not adhere, a relay becomes deenergized closing other relays and thereby switching the motor so as to be driven in the reverse or up direction at a preset speed and simultaneously reestablishing the full generator output and switching to a sensing circuit for controlling the feed motor drive. This reverse motion stops when the arc voltage reaches a preset welding value.