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H2W Technologies Voice Coils are ideal for short stroke (typically less than 2 inches) closed loop servo applications. Their compact size allows them to fit into small spaces. They have very low electrical and mechanical time constants. The low moving mass allows for high accelerations of light payloads. These actuators are wound in such a way that no commutation is required for motion to occur. The result is a much simpler and more reliable system. Coupling the actuators with a bearing system (if not supplied), position feedback device, linear servo amplifier and motion controller yields a system that is capable of intricate position, velocity, and acceleration control. These actuators can also be used for precise force control because of the linear force versus current characteristics.

The AC polynoid is an electrically operated, open loop AC linear induction motor that provides a constant force over its entire stroke. It can run directly off of 115 230 VAC line voltage or with an adjustable frequency drive. Its direction of travel is reversible by switching 2 of the 3 leads.

Should this motor be required to operate in an open loop application, you can control it with a step and direction signal from a standard microstepping drive. The power is supplied to the 2 or 4 phase forcer winding via a flexible cable. The full step is .010 [250 microns] for a 2 phase forcer and it can be microstepped down to .00004 [1 micron]. By integrating an optional linear encoder onto the single-axi

The DRS stage is a low profile, wider footprint, enclosed positioning stage. It is used in closed loop positioning applications that require high speed and high accelerations of heavier loads.

The SRS stage is a compact, small footprint, open type positioning stage. It is used in closed loop positioning applications that require high speed and high accelerations of lighter loads.

The ABS positioning stage is a high precision, granite base, air bearing positioning stage for high end positioning applications. . It is driven by an ironless core, non-cogging 3 phase brushless linear motor and guided by 5 flat magnetically preloaded air bearings floating on a granite base .

Limited Angle Torque MotorsSimply stated, a current carrying conductor placed in a magnetic field will have a force (or torque) exerted upon it. This force is proportional to the direction and magnitude of the current and the flux density field. Since the permanent magnet flux density field is fixed, the direction of the rotation depends on the polarity of input current and the amount of torque that is produced is directly proportional to the magnitude of the input current.