AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Piezo ceramic servo motors1/21/2024 The motors make longer strokes than most other options, and they do it quickly (within 0.8 msec in some cases). The only catch with ultrasonic piezo motors is that their reliance on friction to advance a slide or rotor essentially limits resolution to about 38 nm.įor stepping piezo motors, manufacturers gang multiple piezo elements together to get actuator setups that can move more than 100 lb. Note that some sources call ultrasonic piezo motors standing-wave piezo motors for the way in which they output motion. The stator plate changes shape to roll a pusher and advance a stage. This is how the linear version of an ultrasonic piezo motor works. These output unlimited motion quickly, sometimes within 0.8 msec from the input command - though resolution is only 60 nm or so. Ultrasonic-friction piezo motors have oscillating plates that act as the stator to advance a slide or rotor via friction. Motion is proportional to the drive voltage multi-axis stages move up items a couple millimeters or more. Slightly more complex are flexure-guided piezo motors with motion amplifiers for long and straight moves. The latter (common in medical and dispensing applications) can move several millimeters but with less force. The former generate high forces but only to 20 µm or so. Stacked, shear, and tube piezo motors are three common options here. The most basic piezo motors generate motion by expanding proportionally to voltage. However, some arrangements of piezo elements act as solid-state piezo motors to move loads over short distances. Piezo elements go into myriad transducers and sensors, and that use is perhaps the best known. Today, other piezo crystals immune to humidity are used in engineered systems … but the shape-changing capacity is what all piezo technologies use today. Then they integrate the ceramic with ferroelectric material to make electrodes.įinally, manufacturers apply electromagnetic fields to the piezo elements to align and polarize the material.ĭiscovered by Pierre and Jacques Curie in the late 1800s, piezo elements are named for the Greek word for press - piezein. The Curies found that compressing crystals of potassium sodium tartrate (also called Rochelle salt after the place of its original formulation) create electric voltage … and that electrifying piezo crystal makes it deform. Manufacturers process and press plumbum, zirconate, titanate (PZT) powder together and fire it into a quartz. Piezo elements are ceramics that change shape when subject to electricity or (when subject to mechanical loading) output electricity. The direct drive eliminates power-transmission components in miniature designs. This is a piezo motor - a Piezo LEGS from MICROMO.
0 Comments
Read More
Leave a Reply. |