If you're looking for a new motor for motion control these days you have more
choices than ever. Here is a rundown on some of the new precision motors and
actuators that are enabling real-time control.
Baldor's HyCore linear motor combines features of
brushless technology and less expensive stepper technology. The company says it
offers zero backlash, high efficiency, unlimited travel, improved accuracy, fast
velocities, and high accelerations-over 60 inch/sec and up to 3Gs.
Danaher's new direct-drive rotary servomotors feature an integrated
high-resolution feedback device and a bearing-less design. No bearings means
faster installation-less than 30 minutes, Danaher says. The cartridge motors are
available in two frame sizes with three stack lengths per frame.
Peak torques of 574 oz-inch are available with Thin Gap's size 23 brushless
dc servos. The motors contain a patented electromotive coil, which uses copper
sheets instead of the magnet wire and iron core of traditional motors. The
company says it eliminates magnetic saturation, eddy currents, and hysteresis of
conventional iron-core designs.
MicroMo Electronics is offering a 06mm-series ironless dc motor. It's 15 mm
long. The motors have neodymium magnets, and core-less rotors with
self-supporting skew-winding technology. There's also a matching inline
planetary gearhead available with an all-metal design† for operating
temperatures up to 100C.
High Torque, Onboard Electronics
Intelligent Motion's MDrive line offers new options in high-torque steppers
with onboard electronics: four additional sizes and numerous configurations. The
smallest is size 14, and is for applications where space is tight. The largest
is size 34 and can replace a central controller to run multiple axes.
Hycore Linear Motors accelerate to†