VARS0077 Rotary Voice Coil Motor High Acceleration 0.77Nm 20deg Swing Actuator

Product Overview

The VARS0077-020-00A is a high-acceleration swing-type rotary voice coil motor manufactured by SUPT MOTION, suitable for applications requiring extremely fast angular displacement over a short stroke. At 25 °C, this swing-type voice coil motor delivers a peak torque of 0.77 N·m and a continuous torque of 0.63 N·m, with a total stroke of 20 degrees and a maximum drive voltage of 6.7 V.
The moving coil weighs 66 grams, and the overall dimensions are 75 × 50 × 30 millimeters. The direct-drive design means the coil is the only moving part: there are no gears, belts, or brushes between the electrical input and the mechanical output, so every ampere of current is directly converted into torque without being affected by transmission system delays.
This swing actuator is designed for short, rapid, and highly repetitive motions where throughput is critical. The combination of high peak torque and moderate mass results in angular acceleration that enables pick-and-place mechanisms, sorting gates, and scanning elements to complete each cycle in a matter of milliseconds, while the robust aluminum housing ensures the component’s rigidity during high-speed operation.

Solution

Fast production machinery frequently loses cycle time to actuators that move too slowly or resonate after each step. Pneumatic paddles, steppers and small DC motors with gearboxes all add compliance and settling delays that limit how many operations per minute a machine can perform.
The VARS0077-020-00A solves the problem with a high-acceleration voice coil topology. Because the torque-to-current ratio is constant and the rotor inertia is low, the motor can be driven with aggressive current profiles to accelerate quickly, reverse instantly and stop at the target with little overshoot. The 20-degree stroke is a practical travel for deflector mirrors, sorting flaps, tensioners and similar mechanisms that shuttle between two or three positions.
The absence of mechanical reduction also means there is no backlash to excite vibrations and no lubricated parts to degrade over millions of cycles. In continuous service the motor operates within its 0.63 N·m continuous torque envelope, and the short thermal path through the aluminum frame keeps winding temperature under control. Engineers obtain a fast, repeatable and maintenance-free rotary axis that is simple to integrate with standard servo drivers.

Specifications

Application

Typical uses include high-frequency deflector mirrors in laser processing, oscillating elements in printing and packaging lines, high-speed sorting gates, feeder shuttles and test probes that must step quickly between measurement positions. The actuator is equally at home in rotary valve and damping actuators, rotary positioning systems and flight control actuators across the semiconductor, automotive, industrial and aerospace sectors.
For each of these applications the 20-degree stroke is long enough to move a lever, vane or mirror through its useful range, while the high acceleration keeps the dead time between commands extremely short. The unit also performs well in continuous oscillation duties such as dithering and vibration cancellation, where its zero-backlash construction avoids the impacts and wear that shorten the life of mechanical linkages. Custom stroke limits, coil voltage and mounting interfaces can be engineered for original-equipment manufacturers.

FAQ

Q1: How fast can the VARS0077-020-00A move?

With 0.77 N·m of peak torque driving a 66 g coil, the actuator achieves very high angular acceleration, and typical short-stroke moves settle in the low millisecond range when used with a current-mode servo driver.

Q2: What is the total stroke?

The standard total stroke is 20 degrees. Mechanical end stops and controller-based angle limits can be provided for applications that require a smaller travel or a defined center position.

Q3: Can it run in continuous oscillation?

Yes. Continuous bidirectional oscillation is permitted within the 0.63 N·m continuous torque rating at 25 °C, which covers dithering, scanning and vibration-damping duties without overheating.

Q4: Why is there no backlash in this motor?

The coil drives the output directly inside the magnetic field, so the design contains no gears, belts or couplings. Mechanical backlash and cogging torque are therefore eliminated by construction, not by adjustment.

Q5: What delivery and support options are available?

The minimum order quantity is 1 piece. Samples ship in 3-5 working days and production orders in 15-25 days. SUPT MOTION provides driver user guides and customization services for OEM projects.