Absolute Angular Measuring System in Machine Tools Direct integration in the bearing for high precision rotary axes

Direct integration in the bearing for high precision rotary axes Absolute angular measuring system in machine tools The absolute angular measuring system integrated directly in the bearing can An absolute, inductive angular offer several advantages: measuring system comprises ■ an absolute interface, dispensing a measurement ring including with the need for reference travel the angular pitch (dimensional scale) ■ a hollow shaft design, freeing up and a measuring head. It is integrated the centre of the machine for other components in a radial/axial cylindrical roller rotary table bearing of the...

Due to the design of the measuring head, which is specific to Schaeffler, it can be screw mounted directly Table 1: Pitch accuracy Designation Pitch accuracy Angular seconds on the outer ring without the need to A circumferential seal on the measuring head protects the raceway area of the bearing from the environment. Due to this design solution, Table 2: Angular resolution Designation the measuring head and cable can also be mounted after the bearing is fitted. Angular resolution bit/pitch period The risk of damage as a resulting of mounting operations is thus substantially eliminated. If repair...

The resulting significant key values for the control loop were investigated Table 3: Machine parameters Rotary table Mass moment of inertia of rotating parts As anticipated, the guidance frequency response of the speed control loop and Solution-Line Absolute, inductive Angular resolution Measuring system Operating principle Drive system Motor Controller the guidance step response of the positional control loop show similar patterns compared to other Table 4: Controller parameters Speed controller for the positional control loop, Positional controller Band-stop filter Filter settings Step response...

Current status of the development absolute inductive angular measuring ■ The product described in this flyer system in a rotary axis bearing of is still under development and series YRTS, a measuring system is currently being subjected to is available that is highly suitable for use intensive testing in mumerous pilot in rotary tables in machine tools. In addition to design advantages such as the use of a hollow shaft, there are also functional benefits. In particular, highly dynamic and precise control loops can be achieved. In addition, the principle of this concept makes it resistant to environmental...

MATNR 081834578-0000 / SSD 30 / 01 / GB-D / 201309.5 / Printed in Germany by bresler Your contact Dipl.-Ing. (FH) Günter Schmid Telephone +49 9132 82-2392 [email protected] Schaeffler Technologies AG & Co. KG Industriestraße 1–3 91074 Herzogenaurach (Germany) www.schaeffler.com