PI 027-17 Lohr am Main, 2017-06-06

Integrated absolute value measuring system with FANUC interface

Measuring system from Rexroth with interfaces to match the CNC controllers from Bosch Rexroth, Siemens and Fanuc.

IMS-A: robust, precise and simple at start-up

Bosch Rexroth, Siemens, FANUC: No matter which servo drive or controller the end user prefers, machine manufacturers can equip them all with no hassle - thanks to the measuring system IMS-A integrated into the linear guides. In addition to HIPERFACE*, SSI and DRIVE-CLiQ**, Rexroth now also provides an interface for FANUC automation systems. The absolute position measuring systems IMS-A are highly precise and resistant to metalworking fluids, all kinds of chips and electromagnetic interference fields.

Internationally active manufacturers of machine tools, 3D printers and related systems often provide their customers with the choice between two to three CNC controllers to cover regional preferences. While doing so, they follow a common-part strategy below the drive level as much as possible in order to reduce costs and complexity. Here, with the measuring system IMS-A integrated into the linear guides, Rexroth is opening up additional opportunities. As well as interfaces for CNC controllers from Bosch Rexroth and Siemens, IMS-A now also supports FANUC automation systems. With these variants start-up only takes a few minutes. With the Plug & Play encoder system, the person performing the start-up merely has to determine the respective zero point of the machine and the position offset. An electronic nameplate transfers all other information.

The absolute position measuring system integrated into the linear guides operates without contact and is therefore wear-free. Through its implementation in the runner block and the connected sealing concept, machine manufacturers can avoid energy-intensive air sealing systems, even in working areas with metalworking fluids, dust, chips and other contaminants. This means that the regular replacement or cleaning work that would usually be necessary for glass scales in these environments is no longer required. In a comprehensive series of tests, Rexroth has investigated the effect of a mixture of ferromagnetic laser cutting dust and grease lubricant on the scale. Almost all of the paste-like mixture was wiped away by the standard sealing lips of the runner block and the level of interference was so low in all of the tests that the specified accuracy was always met.

The measuring system is resistant to magnetic fields like those emitting/emitted from linear motors for example. Protected against vibrations and shocks, the sensors and evaluation electronics are placed in a housing on the end face of the runner block. Design engineers thus save the space for external measuring systems. Rail guides equipped with the IMS-A fit into existing machine designs without any constructional alterations in virtually every case. The absolute position is transferred with a resolution of 25 nm for all interfaces, while the repeatability is better than +/- 0.25 µm. The integrated scale is available at an accuracy of up to +/- 3 µm/m. With the IMS-A, users can implement several runner blocks on an up to 4,500 mm long profile rail independently and without any limitations on accuracy. The wear-free IMS-A does not require a battery for buffering the position. Even after a power failure, the measuring system still reports the exact position of the axis upon being switched on again from the integrated absolute scale without a homing cycle.

*HIPERFACE is a registered trademark of SICK STEGMANN GmbH.

**DRIVE-CLiQ is a registered trademark of Siemens.

Economical, precise, safe, and energy efficient: drive and control technology from Bosch Rexroth moves machines and systems of any size. The company bundles global application experience in the market segments of Mobile Applications, Machinery Applications and Engineering, and Factory Automation to develop innovative components as well as tailored system solutions and services. Bosch Rexroth offers its customers hydraulics, electric drives and controls, gear technology, and linear motion and assembly technology all from one source. With locations in over 80 countries, more than 29,500 associates generated sales revenue of approximately 5 billion euros in 2016.

To learn more, please visit

The Bosch Group is a leading global supplier of technology and services. It employs roughly 390,000 associates worldwide (as of December 31, 2016). The company generated sales of 73.1 billion euros in 2016. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. As a leading IoT company, Bosch offers innovative solutions for smart homes, smart cities, connected mobility, and connected manufacturing. It uses its expertise in sensor technology, software, and services, as well as its own IoT cloud, to offer its customers connected, cross-domain solutions from a single source. The Bosch Group’s strategic objective is to deliver innovations for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.” The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing and sales network covers nearly every country in the world. The basis for the company’s future growth is its innovative strength. At 120 locations across the globe, Bosch employs some 59,000 associates in research and development.

Additional information is available online at , , , .


Search press releases


Susanne Herzlieb
Maria-Theresien-Straße 23
97816 Lohr am Main
Phone: +49 9352 18-1573

Related Articles


The factory of the future creates added value through flexibility and agility

In future production environments demands on adaptability will rise. This development can only be realized by separating hardware and software in automation. Bosch Rexroth AG promotes this development primarily with a broad product spectrum from sensors to drive and control technology to software solutions.

Press Information

Get the right runner blocks with digital turbo power

Bosch Rexroth has expanded its series of completely digital eTools for linear motion technology: The new online configurator for runner blocks depicts the company’s full range of ball and roller rail systems. Therefore, in just a few steps, the user can define and order their own custom product. Automatic plausibility checks prevent configuration errors, particularly when individual selections are changed retrospectively. The user can download a 2D or 3D model before ordering. An accompanying 3D drawing in PDF format makes it easier to swap parts before completing the order in the eShop.