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[Sep 2005]
Novel Mini Ceramic Motors
Micromech has recently launched the SERVOCRAFT range of nano-motors, a novel 'ceramic servo motor'. This is a design, says the company, which lends itself to the fabrication of special micro-miniature linear and rotary motors with the capability of nanometric resolution. Manufactured by Nanomotion of Israel, these patented motors are finding many new design slots once the technology is understood.
The standard larger nano-motors in the SERVOCRAFT family are the HR series which are very compact, offering dynamic stall forces from 4N with the HR-1 single element up to 30N for the HR-8, an eight-element unit. They can be used to drive linear stages and rotary axes via ceramic collars or discs and can achieve resolutions down to below 10nm.
The motion is said to be extremely smooth without any of the normal mechanical disturbance associated with circulating bearings and can run at surface speeds of up to 250mm/s while having a feasible step resolution of 5nm. The nano-motors can be supplied in ultra high vacuum compatibility to cover environments up to 10 -10 Torr and non-magnetic formats.
Also in the family is the HR series (low speed) with less force but similar specifications to the HR range and designed to suit low speed applications, which do not exceed 20mm/s.
The smallest standard production nano-motor is the single element ST type that can be supplied in either standard or vacuum versions. They have a dynamic stall force of 1.2N and can impart a surface speed of up to 250mm/s.
www.micromech.co.uk
ENDS