Posted in | Piezo Actuators

Compact Voice Coil Positioning Stage by H2W Technologies

The voice coil positioning stage available from H2W Technologies is compact and suitable for closed loop positioning applications with a short stroke where acceleration, velocity and intricate position control is required.

The compact size of this actuator allows it to be fitted into small spaces. The low moving mass enables for high accelerations of light payloads.

The actuator has extremely low mechanical and electrical time constants. It is wound in such a way that commutation is not required for motion to occur. Hall Effects are also not required, thus resulting in a simpler and more reliable system.

The voice coil positioning stage includes the latest in linear motion technology, such as bearings, motors, limit switches, feedback, and hard stops.

The core coil assembly lacks magnetic attractive force to the stationary magnet assembly. This lessens the load on the bearing system, which in turn extends the life of the bearing.

Key Features

The main features of the voice coil positioning stage are:

  • Compact size
  • Low cost
  • High accelerations
  • High force to weight ratio
  • No cogging or commutation
  • Custom designs with instant turnaround times
  • High flux density neodymium magnets are used.


The applications of the voice coil positioning stage are:

  • Vision inspection
  • Mirror tilt and focusing
  • Clean room
  • Miniature position control
  • Medical diagnostic probes and laser beam steering
  • Z axis for pick and place equipment.

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