Rotary Table Calibration With an Eccentric Mounted Master
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Solution Overview
Problem
Calibration and recalibration of the rotary table axis in coordinate measuring apparatuses with clamping chucks are labor-intensive due to the need for frequent changes between the workpiece and a reference object, and the clamped-in master lacks a definite position relative to the rotary table or component coordinate system, making automated measurement impossible.
Innovation Solution
A rotary table with a permanently or detachably mounted master, arranged eccentrically and outside the clamping chuck receptacle, allowing for easier calibration and recalibration of the rotary table axis, where the master can be fixed via adhesive, interlocking, or screw connections, and can protrude axially or radially from the table to avoid interfering with the workpiece.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a master is clamped in the clamping chuck receptacle for calibration, then calibration can be performed, but frequent changes between workpiece and master are required making the process labor-intensive and time-consuming
Solution Approach 1:
The master is pre-mounted on the rotary table in a fixed position outside the clamping chuck receptacle, eliminating the need for repeated installation and removal during calibration operations. This preliminary positioning allows calibration to be performed without changing components, significantly reducing calibration time while maintaining accuracy.
Solution Approach 2:
The master is extracted from the clamping chuck receptacle and mounted separately on the rotary table body. This separation allows the master to remain in place during workpiece changes, enabling calibration without the labor-intensive process of repeatedly removing and reinstalling the master in the chuck receptacle.
2Measurement precision
If a master is clamped in the clamping chuck receptacle, then calibration is possible, but the master lacks a definite position relative to the rotary table or component coordinate system making automated measurement impossible
Solution Approach 1:
The master is positioned at a specific eccentric location on the rotary table body with defined geometric features. This localized, precise positioning provides a stable reference point with known coordinates relative to the rotary table axis, enabling automated measurement systems to accurately locate and reference the master without manual intervention.
3Productivity
If the master is mounted on the rotary table, then calibration is easier and more efficient, but the master may interfere with the workpiece or stylus during measurement
Solution Approach 1:
The master is positioned eccentrically on the rotary table at a location that is radially offset from the rotary table axis. This asymmetric positioning places the master in a region where it does not interfere with workpieces mounted in the clamping chuck receptacle or with the stylus during measurement operations, while still providing a valid reference for calibration.
Data Source
AI summary
A rotary table for a coordinate measuring apparatus for receiving and mounting a workpiece to be measured is provided. The rotary table has a rotatable main rotary table body and a clamping chuck, which is arranged on the rotatable main rotary table body and which has a clamping chuck receptacle for receiving the workpiece to be measured, the rotary table also having at least one master, which is arranged outside the clamping chuck receptacle, and/or at least one fastener for a master, which is provided in addition to the clamping chuck receptacle. In addition, a coordinate measuring apparatus with a corresponding rotary table is provided.