Position control system
AssigneeOkuma Corporation
InventorNoriyuki FUKUI
Life of this patent
Estimating the term…
Abstract
Respective amounts of movement of feed axes corresponding to first and second position controllers are determined, and if a value obtained by dividing a smaller amount of movement by a larger amount of movement, in the two amounts of movement, falls within a prescribed reference range, a position controller for the feed axis with the smaller amount of movement selects a detected motor position as a position feedback value and a position controller for the other feed axis selects a detected object position as a position feedback value.
Claims2
A position control system for controlling a position of a controlled object by driving a plurality of feed axes, the system comprising:
- an object position detector provided for each of the plurality of feed axes, each object position detector detecting a position, in a movement direction of the relevant axis, of the controlled object as a detected object position;
- a motor position detector provided for each of the plurality of feed axes, each motor position detector detecting a position of a motor driving the relevant feed axis as a detected motor position;
- a position controller provided for each of the plurality of feed axes, each position controller controlling driving of the motor that drives the relevant feed axis so that a difference between a position feedback value and a command position is eliminated;
- and
- a numerical controller that outputs the command positions to the plurality of position controllers, respectively,
- wherein the position controller for a feed axis, a value of which falls within a prescribed reference range, the value being obtained by dividing an amount of movement of the feed axis by a larger amount in amounts of movements of the plurality of feed axes, selects a value based on the detected motor position as the position feedback value, and a position controller for another feed axis selects a value based on the detected object position as the position feedback value.
Dependencies are inferred from the claim text.