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Robotics Industry News

Dual Absolute Encoder Actuator

Harmonic Drive LLC

Harmonic Drive LLC, the leader in high precision motion control announces new encoder options for our 24VDC FHA mini actuators.  Featuring dual absolute encoders and panel mount connectors, these extremely small actuators deliver high torque with exceptional accuracy and repeatability.

Both encoders utilize BiSS-C bi-directional communication. The dual encoders are incorporated in essentially the same package size as the long-standing FHA-C mini single incremental encoder version. Without increasing the size, the dual absolute encoder offers single turn absolute position at the output, without the need for battery back-up.

Panel mount connectors come standard, and customers can choose between 4 exit options. Together, these new features offer the design engineer more flexibility and reliability

A single turn 14 bit (16384 cpr) gear output sensing encoder has been integrated along with a single turn 14 bit (16384 cpr) motor input sensing encoder providing a true absolute encoder that does not require a battery within 360° of rotation of the output. Typical multi-turn encoders monitoring the motor input shaft require a battery to store the current position when power is lost to the system; however, the dual absolute encoder overcomes this need. In other words, No Battery Required. When power is restored the actuator knows its position.

Key Features:

  • Single Turn Absolute Encoders on both Input and Output Sides
  • Compact - significantly shorter than our multi-turn absolute encoder version
  • Minimal length difference compared to our incremental encoder version
  • Output Encoder 14 bit (16384 cpr) resolution
  • Input Encoder 14 bit (16384 cpr) resolution
  • BiSS-C bi-directional communication for both encoders
  • Compatible Drive: Copley Controls BEL or BPL
  • Compact Form Factor
  • Robust Cross Roller Output Bearing Supports High Loads
  • High torque/weight and torque/volume ratio
  • Panel mount connectors

The FHA-C Mini series actuators with dual absolute encoders are among the latest products developed at HDLLC in Peabody, MA.

About Harmonic Drive LLC
Harmonic Drive, LLC engineers and manufactures precision servo actuators, gearheads and gear component sets. We work closely with both Fortune 500 and companies of all sizes to understand their application requirements and provide a standard or, in most cases, a custom-engineered solution to enable the success of their design project. The majority of the products sold by Harmonic Drive, LLC are proudly made at our manufacturing facility in Peabody, Massachusetts. The Harmonic Drive Group Companies are comprised of Harmonic Drive, LLC (United States), Harmonic Drive Systems, Inc. (Japan) and Harmonic Drive AG (Germany). We have shared core values, product designs and quality standards. State of the art manufacturing facilities in the US, Japan and Germany enables us to locally serve the needs of our global customers providing both custom-engineered solutions and standard products.

With over 50 years of experience, our expert engineering and production teams develop enabling technologies and products to meet the needs of an evolving motion control market. We are very proud of our outstanding company history. Our high-precision, zero-backlash Harmonic Drive® gears and Harmonic Planetary® gears have, and continue to play critical roles in robotics, spaceflight applications, semiconductor manufacturing equipment, factory automation equipment, medical diagnostics and surgical robotics. More information can be found by visiting the company’s website.

Harmonic Drive is a registered trademark of Harmonic Drive Systems.


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