US 4,694,233 AGranted

Numerical control apparatus for machine

AssigneeToyoda Koki Kabushiki Kaisha

InventorsTakao Yoneda, Hiroshi Nakano

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Abstract

A numerical control apparatus for controlling a machine which includes a movable element and a servomotor for moving the element. The numerical control apparatus includes memory means for storing numerical data representing parameters such as amount and rate of movement of the element. The numerical data are expressed either or both in a first and second system of measurement. Codes are stored in the memory means for some of the numerical data which are expressed in the first system to define basic movements of the element. The numerical control apparatus is settable to be operable for data expressed in either the first or second system of measurement. The numerical data expressed in the second system of measurement are automatically converted into the first system when the numerical control apparatus is set to be operable for data expressed in the second system of measurement.

Claims9

Dependent claims

A numerical control apparatus for controlling a machine which has a movable element and a servomotor for moving said movable element, said numerical control apparatus comprising:

memory means for storing numerical data representing numerical characteristics of movement of said movable element, said numerical data being expressable in either one of a first system of measurement and a second system of measurement;
code means stored in said memory means for said numerical data expressed in said first system of measurement;
means for ascertaining when said code means is stored;
means for setting said numerical control apparatus to be operable for data expressed in one of said first system of measurement and in said second system of measurement;
means for ascertaining for which system of measurement said numerical control apparatus is set to be operable;
means responsive to said code ascertaining means and said system ascertaining means for converting said numerical data expressed in said second system of measurement into numerical data expressed in said first system of measurement when said numerical control apparatus is set to be operable for data expressed in said second system of measurement;
and
means for exciting said servomotor in accordance with said numerical data stored in said memory means when said code ascertaining means ascertains the presence of said code means, and in accordance with said numerical data converted by said converting means when said code ascertaining means ascertains the absence of said code means and said numerical control apparatus is set to be operable for data expressed in said second system of measurement.

5 more elements

A numerical control apparatus for controlling a machine which has a movable element and a servomotor for moving said movable element, said numerical control apparatus comprising:

memory means for storing numerical data representing numerical characteristics of movements of said movable element, said numerical data being expressable in either one of a first system of measurement and in a second system of measurement;
code means stored in said memory means for some of said numerical data which are expressed in said first system of measurement to define basic movements of said element;
means for ascertaining when said code means is stored;
means for setting said numerical control apparatus to be operable for data expressed in one of said first system of measurement and in said second system of measurement;
means for ascertaining for which system of measurement said numerical control apparatus is set to be operable;
means responsive to said code ascertaining means and said system ascertaining means for converting said numerical data expressed in said second system of measurement into data expressed in said first system of measurement when said numerical control apparatus is set to be operable for data expressed in said second system of measurement;
and
means for exciting said servomotor in accordance with said numerical data stored in said memory means when said code ascertaining means ascertains the presence of said code means and in accordance with said numerical data converted by said converting means when said code ascertaining means ascertains the absence of said code means and said numerical control apparatus is set to be operable for data expressed in said second system of measurement.

5 more elements

Dependencies are inferred from the claim text.