Electronic control circuit

Abstract

Abstract AN ELECTRONIC CONTROL CIRCUIT FOR USE IN CONJUNCTION WITH ELECTRO-CHEMICAL MACHINING APPARATUS COMPRISING MEANS FOR SIMULTANEOUSLY SENSING A PLURALITY OF PARAMETERS OF AN ELECTRIC CIRCUIT AND PROVIDING AN OUTPUT SIGNAL WHEN A PARAMETER HAS AN UNDESIRED CHARACTERISTIC, SWITCHING MEANS OPERABLY ASSOCIATED WITH THE SENSING MEANS FOR RECEIVING THE OUTPUT SIGNALS FROM THE SENSING MEANS, AND MEANS OPERABLY ASSOCIATED WITH AND ACTUATED IN RESPONSE TO THE SWITCHING MEANS FOR PROVIDING AN OUTPUT SIGNAL IN ACCORDANCE WITH THE LOGIC OF THE OUTPUT SIGNALS RECEIVED BY THE SWITCHING MEANS OPERABLE TO CONTROL THE ELECTRO-CHEMICAL CIRCUIT AND THE CORRESPONDING CONTROL METHOD. THE PARAMETERS SENSED INCLUDE MAXIMUM CURRENT, CURRENT INCREASE OR DECREASE, IMINMUM OR THRESHOLD VOLTAGE, VOLTAGE SURGE, VOLTAGE SHORTING OR GAP SPARKOVER, AND MAXIMUM CURRENT AND VOLTAGE. MEANS ARE ALSO DISCLOSED FOR SENSING WHEN THE CURRENT REACHES A PREDETERMINED PERCENT OF MAXIMUM CURRENT BEFORE THE VOLTAGE REACHES A THRESHOLD VALUE AS A SEPARATE PARAMETER, FOR PREVENTING CONTROL IN RESPONSE TO A SENSED POWER LINE TRANSIENT SIGNAL CAUSING VARIATION IN MACHINING CIRCUIT CURRENT AND VOLTAGE, AND FOR PREVENTING AN OUTPUT SIGNAL TO CONTROL THE ELECTRO-CHEMICAL MACHINING CIRCUIT DURING START-UP FOR AN ADJUSTABLE PREDETERMINED PERIOD EXCEPT OF AND MEANS FOR INDICATING WHICH PARAMETER HAS PROVIDED THE OUTPUT SIGNAL DUE TO AN UNDESIRABLE CHARACTERISTIC THEREOF IS ALSO DISCLOSED.

Inventors

• 👤 Robert W Drushel

Bibliographic Details