MOTION SYSTEMS HANDBOOK
LinMot PR01 linear-rotary motors come in myriad sizes for different force and torque outputs. They integrate a linear motor with a rotary torque motor. Controls independently command the two.
Summary of
direct-drive motors A direct drive motor is any motor — rotary or linear — in which the load is connected directly to the motor, without mechanical transmission elements such as gearboxes or belt and pulley systems. In other words, the motor directly drives the load. Regardless of its design, a direct-drive motor has the benefit of eliminating mechanical components that can introduce backlash or compliance and degrade positioning accuracy and repeatability. The elimination of mechanical connections also reduces load inertia and allows more dynamic moves (higher acceleration and deceleration rates with heavier loads) with less overshoot and oscillation. Direct drive motors also have lower noise production than conventional motors, which is important for noise-sensitive applications, like those in the medical and laboratory industries.
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DESIGN WORLD — MOTION
Linear Motors — Motion Control HB 08-19 V3.indd 104
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Without additional transmission elements, direct drive motors tend to be more compact than traditional motors, making them easier to integrate into machines and systems with tight spaces. And with fewer mechanical components (often, the only wear components are linear guides), maintenance is reduced and mean time between failures (MTBF) is increased. Rotary direct drive motors are used to drive goniometers, gimbals, rotary tables, and SCARA and 6-axis robot arms. Many designs have a center bore, which allows electrical cables and pneumatic lines to be routed through the center of the motor. Linear versions are used in numerous automation applications, including packaging machines that require rapid strokes on a continuous basis, machine tools thatWebsite: requirewww.linmotusa.com extreme positioning accuracy and high load carrying capability, and Phone: 262-743-2555 semiconductor manufacturing equipmentEmail: that requires ultrausasales@linmot.com smooth and precise motion. motioncontroltips.com | designworldonline.com
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