Servo control method and apparatus for discharging machine

Details Servo control method and apparatus for discharging machine Servo control method and apparatus for discharging machine

1995-09-13

1997-01-28

Ip, Paul

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

318570, 219 6913, 219 6916, B23P 108

Patent

active

055980759

ABSTRACT:
Disclosed is a servo control method and apparatus for use on discharging machines to control the discharging conditions on working piece. In conventional art, feedrate control is based on the average of the discharging voltage between the discharging electrode and the working piece, which takes the off-time period into account; and in the condition of a long off-time period, the average voltage will be lowered as to affect the stability of the discharging process. The servo control method and apparatus according to the present invention disregards the off-time period and takes only the ignition voltage and discharging voltage into account such that the stability of the discharging machine will not be affected. Furthermore, during discharging, the servo control method and apparatus is capable of detecting whether there is a short-circuit condition and adjusting the average voltage accordingly so as to quickly remove the discharging electrode from the working piece.

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