Piezo actuators change shape when electrically excited. A SQUIGGLE
motor consists of several piezoelectric ceramic actuators attached
to a threaded nut, with a mating threaded screw inside.
Applying power to the actuators creates ultrasonic vibrations,
causing the nut to vibrate in an orbit - similar to a person’s
hips in a “Hula Hoop.”
The rotating nut turns the threaded screw, creating a smooth
in-and-out linear motion. The speed and position of the threaded
screw can be precisely controlled, and the screw holds its position
when the power is turned off. This piezoelectric motor has no
parasitic drag, no backlash, and very high stiffness.
Benefits of the unique design of SQUIGGLE motors
The unique design features of the SQUIGGLE motor deliver significant
benefits.
The piezoelectric actuator generates powerful ultrasonic vibrations,
for:
A tiny, robust assembly
High force and speed
Quiet operation
Vacuum and cryogenic compatibility (optional)
No magnetic field
Thread friction drives the shaft, directly converting rotary
motion to linear motion. This means:
No parasitic drag - less wasted power
Zero backlash with highest stiffness
Nanometer resolution and high force
High torque at low speeds, with no gearbox
Smooth velocity at microscopic speeds
Off-power hold
Very small diameter
Manual screw rotation for off-power positioning
Put Piezo Motors to Work
Learn more about piezoelectric motors, have a look at the different
SQUIGGLE motors that are available for lab or OEM use, or ask
us about creating a tiny piezoelectric motor especially for
you.
