Position detecting system
AssigneeOkuma Machinery Works Ltd.
InventorsToshihiro Kimura, Yoshimaro Hanaki, Humio Nomura
Life of this patent
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Abstract
A reference point detection pulse generator determines normally-equidistant reference points which provide references over the whole control axis range of a numerically controlled machine. On the basis of the outputs of the reference point detection pulse generator and a moving amount detection pulse generator, the position of a moving part is numerically calculated by a moving part position calculator means. The position of the moving part based on the output of the moving amount detection pulse generator is compared with that based on the output of the moving part position calculator means, and if an error is present therebetween an alarm is issued.
Claims3
In a position-detecting system for a machine, including a moving amount detection pulse generator for incrementally detecting the position of a moving part of the machine;
- the improvement comprising a reference point detection pulse generator for determining reference points providing predetermined reference distances within the control range of the moving part, means for numerically calculating the position of said moving part on the basis of the output of said reference point detection pulse generator and said moving amount detection pulse generator, means for comparing the position of said moving part based on the output of said moving amount detection pulse generator with the position of said moving part based on the output of said moving part position calculator means, and means for issuing an alarm when the positions based on the outputs of said moving amount detection pulse generator and said moving part position calculator means fail to coincide with each other.
Dependencies are inferred from the claim text.