The BEI Kimco Magnetics RA models are used in many applications ranging from Z axis control in semi-conductor lead bonding equipment to gimbal torques and pick-and-place robotics. Actuators feature maximum stroke of +/- 60 degrees, maximum torque of 20nm, through hole and set screw hole for easy shaft coupling and two through holes for field assembly mounting. Choices include arc-segment and cylindrical designs.

Smart Voice Coil Actuators

BEI Kimco introduces its housed voice coil actuator (VCA) with an integrated position sensor. A smart voice coil actuator integrates a position feedback sensor for servo positioning or velocity control. It can be mounted into hand-held wands and used in reciprocal medical applications like skin-abrasion and tissue stimulation.

This servo-ready device is compatible with several controllers. Users can control velocity, position, force, reciprocation, and acceleration in applications such as valve control, beam steering, clamping, and servo-control of the X, Y, and Z axis.

This compact actuator offers the following advantages:

• Direct Drive
• Zero Cogging
• Zero Hysteresis
• Infinite Set-ability (limited only by the accuracy of the sensor)

In applications where high speed, high reliability, extreme accuracy, and superior performance are vital, this new actuator and its integrated sensor may be the right match.

Our capabilities include expertise in the integration of complementing components (encoders, resolvers, drives and brakes) into rotary and linear assemblies or motion control systems with proprietary hall-based feedback that brings optimal performance and the realization of lower ownership costs. Quick turn prototyping and 3D software design capabilities are available to enable customers to quickly evaluate BEI Kimco Magnetics' quality and competitive advantage.

Consult factory for prices 1-800-572-7560.

BEI Kimco Magnetics model LA15-16-020A is a two-wire non-commutated direct drive linear voice coil servo actuator motor featuring cog-free, hysteresis free motion with high acceleration capability. This 1.5-in diameter x 1.56-in. long device has a 0.4-in. stroke. It is rated at 2.6-lb. force continuous and 7.6-lb. force for 10 seconds. LA15-16-020A is a cost-effective, superior performance alternative to rotary-to-linear conversion servo drives.

The LA15-16-024A model is a 0.25-in. stroke linear voice coil actuator rated at 5.5-lb. force, continuous and 20.0-lb. force for 10 seconds. This two wire non-commutated actuator measuring 1.5-in. diameter x 1.56-in. long is hysteresis free, cog-free and has a simple linear control characteristic. It is a cost-effective high performance direct drive servo mechanism that exceeds the capabilities of rotary-to-linear conversion devices.

About BEI Kimco Magnetics:
BEI Kimco is an operation of Custom Sensors & Technologies (CST). BEI Kimco is a leading manufacturer of bldc motors, voice coil actuators, smart voice coil actuators and bldc motor controllers for the Transportation, Industrial, and Aerospace & Defense markets.

Specifications:

· Single Phase, Non Commutated

· Stroke Length - 0.75" (19.05)

· Max acceleration – 20 G's

· Accuracy (typical) w/ encoder – 0.0001in/ft (8.3µm/m)

· Repeatability (typical) w/ encoder – 0.0002 in (5 µm)

· Continuous Force – 2.5 lbs (11.12 N)

· Peak Force – 7.5 lbs (33.36 N)

· Length: 3.75" (95.25 mm)

· Diameter: 1.5" (38.1 mm)

· Amplifier Requirement – Linear/PWM Servo Amp.

· Options – Custom mounting, Hollow Shaft, Magnetic Latching/Brake

Note: Custom designs are available

Benefits Summary: The NCM08-15-025-2 LB Moving Magnet Voice Coil Linear Actuator is a compact direct drive linear actuator that can be controlled like a servo motor. It eliminates the complexity of rotary-to-linear actuators and offers greater controllability when compared to solenoids and pneumatic actuators. Unlike a solenoid, the Linear Actuator produces a constant force regardless of actuator position. This makes setup and tuning of the control loop much easier than for devices that have non-linear force profiles. When controlled in a closed loop servo configuration, with an encoder or position sensor, the actuator can be accurately positioned throughout its entire stroke length. In addition, when using a programmable motion controller, the moving magnet voice coil linear actuator can follow an almost infinite number of motion profiles. The actuator does not require commutation, therefore a simple DC amplifier typically used for brush type motors is well suited. Linear DC amplifiers are also compatible and will reduce EMI. The actuator can be provided with a hollow shaft for accommodating electrical and vacuum lines and can also be supplied with magnetic latching mechanisms for vertical applications.

Applications: Therapeutic / Diagnostic Medical Probes, Lens Grinding, Pick and Place, Engraving Machines, Compressors and Pumps, Flow Control / Valves, Focusing, Spindle Feeds.

The LA35 series has produced an actuator with unrivalled versatility. It comes with a choice of 25mm, 50mm and 100mm stroke lengths with a peak force of 16N and 12N respectively. Submicron encoders have been coupled to the latest generation of voice coils and an extremely stiff linear guide to provide high degrees of repeatability together with fast acceleration, fast settling times and controlled force.

In common with all SMAC actuators it is fully programmable permitting the user to exert complete control over force, acceleration and velocity.

This makes it ideal for implementation in industries where SMAC's patented 'soft-land' procedure allows the actuator to both measure and manipulate very delicate and high value components with ease.

It continues the SMAC tradition of supplying direct drive high-resolution voice-coil motors capable of tightly controlled high-speed work profiles.

It is available in linear, linear rotary and linear slide variations.

Stroke lengths are available up to 100mm and the rotary units are equipped as standard with direct drive 5000rev/min rotary motors with a 20,000 count encoder.

The SMAC LAR31 series moving coil actuator is extremely precise with an encoder resolution of 5um with standard options of 1, 0.5 and 0.1. The device is capable of repeatable positioning to +/-2 encoder counts. Further to this highly accurate placement with maximum shaft run-out of 30um as standard, with 10um achievable for special units. It also designed to deliver long life for continuous operation, with units in excess of 100million cycles in the field.

The LAR31 series actuator is compact, measuring only 140 x 77.25 x 35mm, and can easily be programmed to control force/torque, position and velocity in all axes. This enables the ability placement of components at different heights and to have a window to warn of missing or broken components.

The unit offers multiple functions, with the ability to assemble and test components with additional life test and measurement functions in one single unit. The system has the significant advantage of low repeatable friction.

The actuator also has SMAC's unique 'Softland' function, which enables the unit to gently land on a delicate component with a controlled force to avoid damage of both the component and the actuator.

This SMAC solution is highly cost efficient has now been used in a number and variety of PCB assembly applications across the world.

SMAC moving coil actuators are designed to deliver the following benefits: compact overall size, light weight, extremely fast, high precision and offering a combination of programmable force, position and velocity in both linear and rotary axis at the same time.