Magnetic Kit Encoders offer compact, end-of-shaft mounting.
Press Release Summary:
Based around AM256 chip, solid-state rotary encoder kits are intended for brushless dc motor control. Products, available with absolute, incremental, and analog outputs, offer resolutions from 6- to 12-bit. Non-contact, no-wear units operate in continuous temperatures to 125°C and exhibit accuracy to ±0.3°. With axial length of 1/8 in. and diameters down to ¾ in., encoders operate at speeds to 60,000 rpm and handle motor stall, overload, and high shock and vibration conditions.
Original Press Release:
Magnetic Kit Encoders for Brushless DC Motors Offer High-Speed, Accuracy and 'Fit and Forget' Reliability with Compact, End-of-Shaft Mounting
Based around AM256 chip, kit encoders operate at speeds to 60,000 rpm, temperatures to 125°C continuous, with accuracy to ±0.3°, and 12 bit/4096 counts/rev resolution
November 2005 - New solid-state magnetic rotary encoder kits from Renishaw combine high speed and accuracy with exceptional compactness and no-wear "fit and forget" reliability, all at unbeatable affordability for brushless DC motor control. Breakthroughs in simplicity, essentially just a magnet and an AM256 chip, the Renishaw rotary encoders are a great fit for end-of-shaft mounting and motor feedback with axial length of only 1/8" (3 mm) and diameters down to 3/4" (19 mm). Ideal for demanding high-speed applications, the compact, low-mass, no-wear encoders enable rotational speeds to 60,000 rpm. Robust industrial designs, the kit encoders handle motor stall and overload, high shock and vibration conditions, and wide temperature range with continuous operation at up to 125°C.
The versatile magnetic encoders are available with absolute, incremental and analog outputs in a range of industry standard formats with resolutions from 6 to 12 bit (5.6° to 0.08°). By simple addition of a magnet into the end of the motor shaft and the location of a small PCB module just clear of the shaft, high purity sine and cosine signals are produced at one cycle per turn. Absolute shaft position can then be determined to high resolution for feedback and commutation control.
Highly immune to stray magnetic fields in the motor, the AM256 sensor uses a self-compensating array of Hall effect sensors and analog processing techniques. The large array of Hall sensors, coupled with very accurate conditioning of the signal outputs, ensures high purity signals, accuracy to ±0.3°, and resolution to 12 bit (4096 counts per rev).
Equally smooth control is provided in both motor turn directions, Non-contact, no-wear design and high-reliability silicon processes yield industry-leading reliability figures even at elevated temperatures.
As with all Renishaw products, a worldwide application support network and local stocks bring added confidence to system designers.
For more information on Renishaw's encoders, contact Howard Salt, Business Manager, Encoder systems, Renishaw Inc., 5277 Trillium Boulevard, Hoffman Estates, IL 60192. Phone 847-286-9953; fax 847-286-9974. Email: howard.salt@renishaw.com.
For a detailed look at other productivity enhancements for metrology, linear and rotary position feedback, and machine tool calibration, visit Renishaw's web site at: http://www.renishaw.com/encoders.
Reader inquiries should be directed to:
Susan Wilm
Marketing Assistant
Renishaw Inc.
5277 Trillium Blvd.
Hoffman Estates, IL 60192
