... the brush-type DC servomotor with itsiron-core rotor that permit more rapid acceleration and decelera-tion because of their low-inertia, lightweight cup- or disk-typearmatures. The disk-type ... avail-able, a linear actuator with a 90-VDC motor can be equippedwith a solid-state rectifier/speed controller. Closed-loop feed-back provides speed regulation down to one tenth of the maxi-mum ... they have many of the character-istics of conventional motors. They can replace conventionalrotary motors driving leadscrew-, ballscrew-, or belt-driven sin-gle-axis stages, but they cannot...