MULTIPLE CONTROL METHOD FOR CONTROLLING CURRENT OF MAIN SHAFT IN CNC MACHINE TOOL

PURPOSE: A multiple control method for controlling current of a main shaft in a CNC(Computerized Numerical Control) machine tool is provided to maintain constantly a current value of the main shaft by increasing or reducing a transfer speed according to states of processes. CONSTITUTION: A current m...

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Bibliographic Details
Main Authors LEE, TAEK MIN, YANG, MIN YANG
Format Patent
LanguageEnglish
Korean
Published 30.11.2002
Edition7
Subjects
CONTROL OR REGULATING SYSTEMS IN GENERAL
CONTROLLING
FUNCTIONAL ELEMENTS OF SUCH SYSTEMS
MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS
PHYSICS
REGULATING
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Summary:PURPOSE: A multiple control method for controlling current of a main shaft in a CNC(Computerized Numerical Control) machine tool is provided to maintain constantly a current value of the main shaft by increasing or reducing a transfer speed according to states of processes. CONSTITUTION: A current measuring process is performed to measure the amount of real-time variable current of a main shaft(S100). A CNC machine tool is modeled as the first system having a delay time by formalizing a relationship between various parameter values obtained from a test value of the CNC machine tool(S200). The current of a main shaft is constantly maintained by designing a controller for controlling a transfer speed in order to control the modeled CNC machine tool(S300). Accordingly, the control process can be performed without a variation of load in the main shaft by obtaining the efficient transfer speed.
Bibliography:Application Number: KR20010029081