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Balanced Spring Mass Linear Actuator can be operated open loop.

Press Release Summary:

With 0.15 in. stroke, NCM02-05-005-4JBL voice coil actuator suits controlled sinusoidal motion applications at 1-1,000 Hz (open loop) and 1-125 Hz (closed loop). Moving magnet type linear actuator has precision-ground, 0.125 in. dia shaft guided by jeweled sapphire bushings; 2 compression springs are mounted on either end of shaft. Springs provide centering force for magnet assembly and conserve energy during deceleration phase of sinusoidal motion profile.

Original Press Release:

Balanced Spring Mass Linear Actuator

H2W introduces its most compact balanced spring mass actuator. The voice coil actuator (NCM02-05-005-4JBL) can be operated open loop and is ideal for controlled sinusoidal motion applications (1 to 1000 Hz for open loop applications and 1 to 125 Hz for closed loop applications). The NCM moving magnet type linear actuator has a precision ground 0.125" diameter shaft that is guided by jeweled sapphire bushings and has 2 compression springs mounted on either ends of the shaft. The springs provide a centering force for the magnet assembly and are used conserve energy during the deceleration phase of the sinusoidal motion profile. Higher frequencies and displacements are possible with this balanced spring mass system.

The moving magnet voice coil has a 0.15" [3.8 mm] stroke, generates 0.5 lbs [2.2 N] of continuous force and 1.5 lbs [6.6 N] of peak force. The actuator is driven in open loop mode by feeding a sinusoidal control signal into a servo amplifier which is in turn connected to the two leads of the actuator. The actuator can also be operated as a closed loop system by adding a programmable motion control and position feedback device.

- High frequency operation
- High acceleration
- Compact size
- Custom strokes and force configurations available

H2W Technologies is dedicated to the design and manufacture of linear and rotary motion products that are used in the motion control industry. The complete line of linear electric motors includes: single and dual axis linear steppers, DC brush and brushless linear motors, voice coil actuators, and AC induction motors. Also offered is a complete line of ball screw, lead screw and belt driven positioning stages. Other motion control products include: limited angle torque motors for compact, limited angular excursion rotary servo applications, 3 phase brushless rotary servo motors with matching digital servo amplifiers and permanent magnet linear brakes for fail-safe, zero power braking for baggage handling and people moving applications as well as amusement park rides.

With over 85 years combined experience in the linear and rotary motion field, the H2W Technologies team of engineers offers the optimal solution to the most demanding motion control requirements.

For additional information please contact Mark Wilson at H2W Technologies, 26470 Ruether Avenue #102, Santa Clarita, CA 91350; Tel: 888-702-0540, Fax: 661-251-2067, E-Mail: or visit the website at

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