Operation control apparatus of working system

An operation control apparatus of a working system which comprises a machining center numerically controlled, a pallet stocker disposed in the vicinity of the machining center and storing a number of pallets therein, a preparatory station for setting-up a work on a pallet, a conveying unit for automatically conveying the pallet from the pallet stocker to the preparatory station or the machining center, and a control apparatus for controlling an operation of the working system, said operation control apparatus comprising:

• a control unit provided for the machining center and including a numerically control (NC) section executing instructions regarding a working schedule table display, a working schedule table edition, a scheduled operation start, a calling of a next working part program, an automatic cycle start, a tool exchanging, a completion of the scheduled operation, a cutting abnormal detection, a retraction of a working pallet on an abnormality, a selection of a tool to be exchanged, and a self-diagonosis information report of a machine and further including a Micro Processor Unit (MPU) section executing a schedule data management concerning rewriting of pallet existing data and rewriting of schedule data, a sequence operation completion information, a preparation of self-diagonosis information report, a transmission of conveying instructions to the pallets and a status information of the pallet;
• a preparatory operation board disposed in association with the preparatory station and instructing a pallet interruption conveyance instruction and preparation completion and vacant pallet return information;
• a control board operatively connected to the control unit and adapted to receive the conveying instructions to the pallets and the pallet status information, and to transmit the pallet status displaying instructions and the pallet conveying operation execution instructions on the basis of each information of a pallet interruption conveyance and the preparation completion and vacant pallet return from the preparatory operation board and to transmit each report of the pallet conveyance completion, the pallet existing data and the self-diagonosis to the MPU section of the control unit;
• and
• a movable control board provided in the conveying unit and adapted to receive the conveying operation execution instructions and to transmit an operation condition of the conveying unit to the control board.