POSITAL’s New Multiturn Counter Module: Battery-Free Rotation Counts

November 11, 2020

POSITAL’s Multiturn Counter Module is a zero-maintenance rotation counter designed to be integrated into motors or other types of rotating machinery to provide their control systems with a reliable count of the number of rotations the machine has completed. These modules can be used in many situations where rotation counts are needed, including positioning tasks in machine tools, robots, packaging machinery and medical equipment.

“The new multiturn counter module is an unbundled version of the rotation counter built into our multiturn kit and stand-alone encoders”, explains Christian Fell, head of POSITAL’s North American business.  “By offering this as a separate component, we are making our well-proven, maintenance-free counter technology available to manufacturers or machine builders who prefer to use other solutions to measure rotations in the 0 – 360 ° range, or who are only interested in keeping track of complete rotations.”

A special feature of POSITAL’s multiturn counter module is a Wiegand wire-based energy harvesting system that powers the counter and memory circuits. “An important advantage of this system is that it completely eliminates any need to check, replace and dispose of backup batteries”, continues Fell. The counter module uses magnetic sensing technology and requires a small permanent magnet mounted on the rotating shaft. A Wiegand sensor on the module generates a small amount of electrical energy with each rotation of the magnet, activating the counter and ensuring that each rotation is reliably recorded – even if movements occur while control system power is unavailable. Output from the Wiegand system is nearly speed-independent, so that the counter module will reliably record rotations for speeds ranging from near-zero to 12,000 RPM. The measurement range is 43 bits, or almost 9 trillion net turns.

The multiturn counter module is mounted on a 35 mm PCB, designed to fit easily into the housing of the host machine. Available accessories include a Samarium-Cobalt permanent magnet (to be mounted on the rotating element of the machine), a bottom shield (to isolate the device from magnetic fields originating inside the host machine) and an upper shield (for protection from external magnetic fields, dust and other environmental hazards). The counter module communicates with the controller unit through an SPI bus interface and has extensive internal diagnostic capabilities to simplify setup and improve reliability.

For more information, visit www.posital.com.

Related Articles

  • New G2RV-ST And G3RV-ST Relays from Omron

    New G2RV-ST And G3RV-ST Relays from Omron

    Omron’s New G2RV-ST And G3RV-ST Relays Are Among the Fastest in the Industry That Provide Better Visibility, Top-Notch Reliability, and Vibration Resistance January 23, 2023 Speedier relays are a key requirement in today’s fast-paced manufacturing industry, and Omron responded to this need with the new ST relays that are among the fastest available on the… Read More…


Editor’s Pick: Featured Article

Conserving Power and CO2 Emissions with Premium Efficiency Motors

The process of converting electrical energy to mechanical energy is never perfect. As much as we would like to have a 100% efficient motor, it is impossible to build a machine that will take 746 watts of electricity (the equivalent of 1 Hp) and convert it to 1 Hp of mechanical output. It always takes somewhat more than 746 watts to yield 1 Hp’s worth of output.

Motors are continuously being pushed to be more efficient and reduce these losses. Over the years the guiding regulations of motor manufacturing have pushed us to improve efficiencies to new levels to reduce the considerable global power consumption of motors, as they are everywhere. From our factories, utilities and homes and most anywhere you can think of.

How much power consumption aka money are you spending that you do not have to? Take a minute while having your coffee to see if you can save money.

Read More



Latest Articles