A precision contact probe used in coordinate measuring machines (CMMs) for dimensional inspection and quality control in manufacturing.
A contact probe is a precision measurement component in coordinate measuring machines (CMMs) that physically touches the workpiece surface to collect dimensional data points. It consists of a stylus with a spherical tip, a probe head with deflection sensors, and a mounting interface. When the stylus contacts the workpiece, the probe detects deflection and triggers a measurement signal, recording the exact position in three-dimensional space for geometric dimensioning and tolerancing (GD&T) analysis.
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Contact probes physically touch the workpiece with a stylus, providing high accuracy for hard materials with defined surfaces. Non-contact probes (like laser or vision systems) measure without physical contact, suitable for delicate or soft materials but may have different accuracy characteristics.
Contact probes should be calibrated daily or before critical measurements using a reference sphere. Full performance verification should follow manufacturer recommendations, typically every 6-12 months or according to ISO 10360 standards.
Yes, with appropriate selection. Low-force probes (0.1N-0.3N) with larger tip diameters can minimize surface deformation. For very delicate materials, non-contact methods might be preferable to avoid any marking or damage.
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