SCALE FOR A POSITION-MEASURING DEVICE AND POSITION-MEASURING DEVICE
First Claim
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1. A scale for a position-measuring device, comprising:
- a scale including at least two graduation tracks, each track being P-periodic in a measuring direction and including an integrated reference marking in the form of an interruption of the P-periodicity at evenly spaced first intervals;
wherein the graduation tracks are offset transversely with respect to the measuring direction, and the integrated reference markings are staggered in the measuring direction.
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Abstract
A scale and a position-measuring device include the shifting of reference markings in graduation tracks, offset transversely with respect to the measuring direction, by fractions of the interval of the reference markings within a graduation track. It is thus possible to eliminate, or at least to markedly reduce, negative effects of the disturbance of the periodicity of a graduation track by the reference markings.
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Citations
14 Claims
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1. A scale for a position-measuring device, comprising:
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a scale including at least two graduation tracks, each track being P-periodic in a measuring direction and including an integrated reference marking in the form of an interruption of the P-periodicity at evenly spaced first intervals; wherein the graduation tracks are offset transversely with respect to the measuring direction, and the integrated reference markings are staggered in the measuring direction. - View Dependent Claims (2, 3, 4, 5)
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6. A position-measuring device, comprising:
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a scale including at least two graduation tracks, each track being P-periodic in a measuring direction and including an integrated reference marking in the form of an interruption of the P-periodicity at evenly spaced first intervals, the graduation tracks being offset transversely with respect to the measuring direction, and the integrated reference markings being staggered in the measuring direction; and a patterned detector configured to scan the scale to generate electrical signals to form a position value, the detector including a plurality of detector tracks configured to scan the graduation tracks, the detector tracks being offset transversely to the measuring direction, each detector track, for a plurality of periods of the graduation tracks, including a plurality of m sensors per period arranged one after another in the measuring direction. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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Specification