用於磨床的 MP250 接觸式測頭

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MP250 strain gauge probe The world’s first strain gauge based inspection probe for grinding machines, using Renishaw’s patented Rengage™ technology.

About the MP250

The Renishaw MP250 is an ultra compact touch probe for grinding machines that sets new standards for the precision measurement of 3D part geometries, whilst offering all the standard probing benefits of reduced set-up times, reduced scrap and improved process control.

The MP250 uses a hard-wired connection to the machine control via the specially designed HSI interface.

It offers a truly unrivalled combination of size, accuracy, reliability and robustness that will benefit its users through reduced set-up times, reduced scrap and improved process control.

The MP250 can also be used with Renishaw's HPGA (High Precision Generic Arm)

MP250 features and benefits

High accuracy
Patented Rengage™ strain gauge technology with ultra-low pretravel variation provides high accuracy, even when the application requires long styli.

Highly repeatable
Improved repeatability in all probing directions compared to standard probes.

Ultra compact
Measuring only Ø25 mm x 40 mm long, the MP250 is ideal for grinding machine applications with restricted space.

Robust and reliable
Renishaw's MP250 sets new standards for reliability and is designed to resist the harshest machine conditions.

MP250 specifications

Specification
Dimensions	Length: 40.7 mm (1.60 in) Diameter: 25 mm (0.98 in) Weight: 64 g (2.26 oz)
Transmission type	Hard wired transmission using the HSI interface
Sense directions	Omni-directional ± X, ± Y, + Z
Uni-directional repeatability	0.25 µm (10 µin) 2 sigma*
2D lobing in X, Y	± 0.25 µm (10 µin)*
3D lobing in X, Y, Z	± 1.00 µm (40 µin)*
Stylus trigger force XY plane +Z direction	0.08 N, 8.0 gf (0.29 ozf) typical minimum 2.6 N, 270 gf (9.4 ozf) typical minimum
Stylus overtravel force** XY plane + Z direction	0.70 N, 70 gf (2.5 ozf) typical minimum § 5.0 N, 510 gf (18 ozf) typical minimum †
Stylus length	Standard 50 mm (1.97 in) Longest 100 mm (3.94 in)
Stylus overtravel** X and Y direction Z direction	± 13° 6.5 mm (0.26 in)
Minimum trigger speed	3 mm/min (0.12 in/min)
Mounting	M16 thread, for LT extension bars and adaptors
Sealing	IPX8
Storage temperature	-10 °C to 70 °C (14 °F to 158 °F)
Operating temperature	5 °C to 50 °C (41 °F to 122 °F)

* Performance specification is for a test velocity of 480 mm/min (18.9 in/min) with a 35 mm stylus. Test velocity does not constrain performance in application.

** The stylus trigger force is the force exerted on the component when the probe triggers. However, the maximum force applied to the component will occur after the trigger point and will be greater than the trigger force. The magnitude depends on a number of factors affecting probe overtravel including measuring speed and machine deceleration. If the forces applied to the component are critical, contact Renishaw for further information.

§ Stylus overtravel force in XY plane occurs 50 µm after the trigger point and rises by 0.12 N/mm, 12 gf/mm (11 oz/in) until the machine tool stops (in the high force direction and using a 35 mm stylus).

† Stylus overtravel force in + Z direction occurs 11 µm after the trigger point and rises by 1.2 N/mm, 120 gf/mm (110 oz/in) until the machine tool stops.