Eltra features a High Resolution, Compact, Robust and Cost effective multi-turn encoder without gears or battery.

What makes the EAM36 encoder series special is the unique technology used to count the number of rotations that the device does. There are multiple ways of providing this capability, but all of them have drawbacks. One possible approach would be to use a gear box to drive a second magnet that would increment of one unit each rotation of the shaft, but this approach would add complexity, size and cost to the device. Another option would be to use an electronic counter with a battery backup. Batteries however must be checked periodically and occasionally replaced, and this increases maintenance costs. Moreover, batteries are unreliable under hot and harsh industrial conditions and represent an hazardous waste, and require specific disposal care.

Eltra''s designers have developed a solution based on the ‘Wiegand effect''.

The key feature of the EAM36 multi-turn encoders is that the turn counter mechanism is self-powered. The encoder shaft rotation generates enough electrical energy – independently from the rotating speed - to trigger the turn counter and to save the event in a non-volatile random-access memory (FeRAM).

The magnetic technology is the key contributor for sturdiness and compact size of the EAM36, which complements the well known Eltra''s multi-turn optical series (EAM58, EAM63).

Features:

Compact size (OD: 36 mm, solid shaft housing length: 43 mm )

High resolution (51 bit total)

Electronic zero set

Wide working temperature range (-20/+100°C)

Quick and simple assembly

Applications:

Medical devices

Heavy construction machinery

Automated doors

Elevator systems

High-demanding factory automation systems

High reliability application

Eltra is a global leader in the design, manufacturing and marketing of high quality, precision sensors since 1985, serving a variety of markets including: Automation, Textile and Ceramic Machinery, Motor Manufactures, Graphics, Robotics/Material Handling, Machine Tool and Specialty Machines.

We are happy to present this product at SPS in Nuremberg Hall 4A-Stand 646