Patent ID: 6794842
Filing Date: 2004-09-21
Classification: G05B,H02P

Abstract:
A servomotor drive control system comprising:a command unit such as a numerical control unit, a plurality of drive control units for controlling drive of servomotors, a first communication line for transmitting data such as a control command, in a direction of said plurality of drive control units from said command unit, and a second communication line for transmitting data such as detection data, in a direction of said command unit from said plurality of drive control units, wherein said plurality of drive control units synchronously control said servomotors, and a motion control unit is placed between said command unit and said plurality of drive control units for receiving the control command given to said plurality of drive control units, transmitted through said first communication line from said command unit, receiving the detection data transmitted through said second communication line from said plurality of drive control units, generating a synchronization error correction control command based on the received control command and detection data, and transmitting the generated synchronization error correction control command to said drive control units through said first communication line, and said drive control units receive the control command from said command unit and the synchronization error correction control command from said motion control unit, transmitted through said first communication line and control said servomotors based on the received control command and synchronization error correction control command.