Coordinate positioning machine
By using magnets and elastic components to absorb thermal expansion in the extendable leg assembly of a non-Cartesian coordinate positioning machine, the measurement error caused by the heat of the drive motor is solved, thus improving measurement accuracy and reliability.
CN115371605BActive Publication Date: 2026-03-17RENISHAW PLC
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Patent Information
- Application Number
- CN202211065701.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2016-04-25
- Filing Date
- 2017-03-31
- Publication Date
- 2026-03-17
- Estimated Expiration
- 2037-03-31
AI Technical Summary
Technical Problem
In non-Cartesian coordinate positioning machines, the heat generated by the drive motor causes thermal expansion of the metering structure, affecting measurement accuracy and repeatability.
Method used
An extendable leg assembly including a magnet and an elastic component is adopted. The magnet extends and retracts via a linear motor, and the elastic component absorbs the thermal expansion or contraction of the magnet to prevent heat from affecting the metering structure.
Benefits of technology
It improves the measurement accuracy and repeatability of non-Cartesian coordinate positioning machines and reduces the adverse effects of thermal expansion on measurement results.
✦ Generated by Eureka AI based on patent content.
Abstract
A non-Cartesian coordinate positioning machine is provided, including a first platform and a second platform, and a plurality of extendable leg assemblies arranged between the first platform and the second platform for positioning the first platform and the second platform relative to each other. Each extendable leg assembly includes: (i) a first member and a second member that move relative to each other when the extendable leg assembly changes length, and (ii) a measuring member fixed to the first member for measuring the length associated with the extendable leg assembly; wherein the first member is at least partially formed of a composite material.
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