Integrated encoders for linear and rotary drives

Application-specific encoder engineering

The solution

Balluff offers a standard catalog portfolio of incremental or absolute magnetic targets in a variety of form factors including linear tape, radial ring, and off-axis ring or disk with pole spacings of 1, 2, and 5 mm. In many cases, applications can be solved with these off-the-shelf items. In applications where no standard product fits the requirements, Balluff offers customizing services for magnetic targets and track readers.

The features

• Wide variety of standard designs for direct integration
• Customized solutions for application-specific requirements

Control motors and drives with absolute precision

The solution

Balluff's Nonius 2-track absolute encoder disc technology is gaining a reputation in the motor encoder world as best-in-class. When combined with a high-quality sensing chip, the high-quality rotary disk delivers unparalleled accuracy for motor shaft position feedback. Balluff absolute rotary disk systems find application anywhere that motor shaft position must be known in real time, for example steer-by-wire electric steering systems. Another application for this technology is in torque motors that are used to index a rotating mechanism to a precise angular location, within < ±0.2° absolute error per rotation.

Compared to alternatives like glass, Mylar, or metal encoder wheels, the advantages of magnetic targets for motor feedback include immunity from contamination by dirt, dusts, and liquids and much higher tolerance of shock and vibration.

The features

• Compact 30 mm outer diameter
• Off-axis sensor location minimizes effects of shaft runout
• 32/31 2-track Nonius system
• Pole pitch: 1.28 mm (master track), 0.96 (Nonius / vernier track)
• Compatible with popular reader chips such as iC-MU (iC-Haus)
• Aluminum carrier with rubber ferrite magnetic material
• Temperature range - 40° C to +85° C

Absolute rotary encoder enables precise electric valve control

The solution

Balluff's Nonius 2-track absolute encoder disc technology, when combined with a high-quality sensing chip, delivers unparalleled accuracy for rotary valve position feedback. The system allows indexing of the rotating mechanism to a precise angular location, within < ±0.2° absolute error per rotation.

Unlike resistive potentiometer solutions, magnetic encoders are non-contact and wear-free for long service life. Other advantages of magnetic encoders for valve position feedback include immunity from contamination by dirt, dusts, and liquids, and higher tolerance of shock and vibration.

The features

• Compact 30 mm outer diameter
• Off-axis sensor location minimizes effects of shaft runout and enables media to flow through the center in some applications
• 32/31 2-track Nonius system
• Pole pitch: 1.28 mm (master track), 0.96 (Nonius / vernier track)
• Compatible with popular reader chips such as iC-MU (iC-Haus)
• Aluminum carrier with rubber ferrite magnetic material
• Temperature range - 40° C to +85° C