Current supply set for spark erosion machine with constant current supply - has first switching element and part which interrupts output current and second switching element which regulates AC power output to machining gap

摘要

The current supply set also includes an output current control part (130), which delivers at least one upper limit valve (209) and a lower limit value (210). A comparator (131,132) compares the output current values of the constant current source (100) and the at least one upper limit value also the at least one lower limit value of the output control part (130), with each other. A first flip-flop (133) responds to the comparator. A unit (142) controls the output current of the constant current source (100) in response to the first flip-flop, which is controlled by a discharge control command from a discharge control part (140) and a discharge time control command from a timer (141). A second flip-flop (143) responding to the output current part, controls the interrupter part (110) which interrupts the output current. ADVANTAGE - Increases effective current output and discharge current is controlled at specified value to eliminate fluctuations in supply voltage. Current set is small in size and low wt. Due to AC output eliminates electrochemical corrosion and gives higher machining quality.