US 6,301,511 B1Granted

Numerical control unit for turning mechanism

AssigneeToshiba Kikai Kabushiki Kaisha

InventorsJun Fujita, Kiyoshi Inoue, Hideki Hayashi

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Abstract

A numeric control device of a turning mechanism which turns a turning body from a driving source which circularly moves through a non-linear transmitting mechanism has a coordinate transformation device outputting a signal which converts an inputted turning angular signal into a position of the driving source, and a compensator outputting a signal which is derived from computing a positional error of the driving source in accordance with the turning angular signal, and the control of the driving source is carried out by a servo-input signal which is derived from the sum of a conversion signal outputted from the coordinate transformation device and a compensation signal outputted from the compensator. Since the numerical control mechanism of the present invention controls the driving source with addition of the compensation signal, it becomes possible to stabilize the turning velocity of the turning body with high accuracy.

Claims8

Dependent claims

A numerical control device for a turning mechanism that turns a body about a shaft and is driven by a driving source that includes an output that moves in a non-circular motion and turns said body via a non-linear transmitting mechanism, said numerical control device comprising:

a coordinate transformation device for outputting a signal obtained by converting a signal corresponding to an angular position of said body about said shaft while being driven by said transmitting mechanism into a position of said output of said driving source;
and
a compensator for outputting a signal obtained by computing a compensation value of said position of said output of said driving source in accordance with said signal corresponding to an angular position of said body about said shaft while being driven by said transmitting mechanism,
the signal outputted from said coordinate transformation device and the signal outputted from said compensator being added together to form a servo-input signal to control said driving source.

1 more element

Dependencies are inferred from the claim text.