Cylindrical Grinder Gauge measures large-diameter parts.

Press Release Summary:

As in-process gauge for cylindrical grinders, Protomar 300 measures diameters to 300 mm having continuous or interrupted surfaces of any shape and number of teeth. Absolute gauge, featuring ±2 microns accuracy, can be used with Marposs P7 multi-function control unit, eliminating need for special software in machine CNC for control and machine/operator interface. Measurements are referenced to one calibration cycle, eliminating dedicated setup master for each part/diameter.

Original Press Release:

Marposs Flexible, Absolute Gauge for Measuring Large Diameter Parts New at IMTS-2010

Auburn Hills, MI - Marposs Corp. will introduce its new Protomar 300 in-process gauge for cylindrical grinders in booth # E-5521 at IMTS, Sept. 13-18, 2010, in Chicago.

The new Protomar 300 is an absolute gauge with measuring accuracies equal to that of standard in-process gauges. The Protomar 300 gauge, which has a measuring range of 300 mm, has been designed for measuring diameters having continuous or interrupted surfaces of any shape and number of teeth with +/- 2 microns accuracy. Its wide measuring range allows the Protomar 300 to gauge sequentially any number of different external diameters on large parts such as railway axles, mill rolls, printing rolls, electrical motors and wind power generators. All measurements are referenced to a single calibration cycle, thereby eliminating the need for a dedicated setup master for each part or diameter to be ground.

The Protomar 300 gauge is designed for use with the Marposs P7 multi-function control unit, which eliminates the need for special software in the machine CNC for control and machine/operator interface. The Protomar 300 and P7 system provides real-time grinding cycle control through a variety of interfaces and I/O options. When connected to a P7 unit, the same Protomar 300 in-process gauge can be used for post-process roundness checking at the end of the grinding cycle. Information regarding the status of the shape compared with two programmable thresholds can be provided by the P7 control unit to the machine's PLC or a remote system to perform further shape control analysis or statistical control to calculate and monitor process and machine capability.

Use of the Protomar 300 gauge and P7 control unit enables high performance and consistent cycle time while reducing and optimizing the grinding cycle.

Also new from Marposs at IMTS will be the i-Wave, the company's newest wireless device in the M1 Star bore gauge product line; the new Mida WRS touch probing system, which has a 2.4 GHz applied radio transmission frequency band and can be universally applied on machine tool applications in most parts of the world; and the Gage Pod data acquisition system for use on applications from simple manual gauging to fully automatic measurement and inspection systems.

For more information on the new Protomar 300 absolute in-process gauge, contact Marposs by toll-free phone 1-888-627-7677, by e-mail to or by visiting the company's website at

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