ABSOLUTE ENCODER SETUP INDICATION
First Claim
1. A method of operating an absolute encoder apparatus, the encoder apparatus comprising a scale having features defining absolute position information in at least one measuring dimension, and a readhead configured to read the features, the method comprising:
- obtaining at least one representation of at least some of the features defining absolute position information;
analysing the at least one representation to determine at least one parameter indicative of the quality of the representation; and
providing an output indicative of the relative setup of the scale and readhead based at least in part on the at least one parameter.
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Abstract
This invention relates to a method of operating an absolute encoder apparatus comprising a scale having features defining absolute position information in at least one measuring dimension, and a readhead configured to read the features. The method comprises: obtaining at least one representation of at least some of the features defining absolute position information; analysing the at least one representation to determine at least one parameter indicative of the quality of the representation; and providing an output indicative of the relative setup of the scale and readhead based at least in part on the at least one parameter.
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Citations
25 Claims
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1. A method of operating an absolute encoder apparatus, the encoder apparatus comprising a scale having features defining absolute position information in at least one measuring dimension, and a readhead configured to read the features, the method comprising:
- obtaining at least one representation of at least some of the features defining absolute position information;
analysing the at least one representation to determine at least one parameter indicative of the quality of the representation; and
providing an output indicative of the relative setup of the scale and readhead based at least in part on the at least one parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- obtaining at least one representation of at least some of the features defining absolute position information;
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24. An absolute encoder apparatus comprising a scale having features defining absolute position information in at least one measuring dimension, and a readhead configured to read the features, in which the apparatus is configured to:
- obtain, via the readhead, at least one representation of at least some of the features;
analyse the at least one representation to determine at least one parameter indicative of the quality of the representation; and
provide an output indicative of the relative setup of the scale and readhead based at least in part on the at least one parameter.
- obtain, via the readhead, at least one representation of at least some of the features;
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25. A readhead for an absolute encoder apparatus, comprising:
- at least one sensor for obtaining at least one representation of at least some of the features;
circuitry configured to analyse the at least one representation to determine at least one parameter indicative of the quality of the representation; and
an output device for providing an output indicative of the relative setup of the scale and readhead based at least in part on the at least one parameter.
- at least one sensor for obtaining at least one representation of at least some of the features;
Specification