Battery-free rotation counts with multiturn module for rotating machinery
Mike EdwardsProducts Electromate Posital
The Multiturn Counter Module from Posital 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.
The modules, available from Electromate, can be used in many situations where rotation counts are needed, including positioning tasks in machine tools, robots, packaging machinery and medical equipment.
A special feature of the multiturn counter module is a Wiegand wire-based energy harvesting system that powers the counter and memory circuits, completely eliminating any need to check, replace and dispose of backup batteries, the company says.
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.
Watch installation video
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