Slim motor offers high acceleration
A
Copley Controls product story
Edited by the Engineeringtalk editorial team
May 31, 2007
Copley Motion Systems' STB11 motors provide ten times the speed and ten times the life of ballscrew actuators.
A compact new direct drive linear motor combines a slim form factor with high speed and 25g acceleration.
Copley Motion Systems' STB11 motors provide ten times the speed and ten times the life of ballscrew actuators making them ideal for boosting productivity in high speed point-to-point positioning applications.
STB11-based positioning stages have the same form factor as ballscrew linear drives, enabling an easy migration to next-generation performance.
The motor's integral solid-state position sensor eliminates the expensive and delicate external encoder traditionally required in linear motor systems, making it rugged for applications requiring up to an IP67 rating.
The elimination of external encoders also simplifies integration compared to traditional linear drive technologies.
The motor's load-positioning forcer is driven directly by the interaction between its permanent magnet and electrically energised magnetic fields.
There are no intervening gear trains, ballscrews, flexible couplings or rotary motors to add inertia and impair the dynamic response of the linear drive.
STB11's permanent magnets are sealed into the stainless steel thrust rod.
The load-carrying forcer travels on a low- friction single rail bearing and the linear motor's drive coils are encapsulated within the forcer.
The load carrying forcer travels in free air and dissipates heat efficiently without the need for forced convection cooling.
This enables the STB11 to operate continuously at high duty cycles.
Like all the tubular motors in the ServoTube range, the STB11 features standard +/-12 microns positioning repeatability.
The STB11's combination of simplicity, reliability and dynamic performance enable fast-response digital servos to replace complex, wear-prone electromechanical assemblies in pick and place arrangements.
Productivity can be increased where space is critical and costly, such as desktop laboratory automation machines because the forcer width is only 26mm.
STB11 linear motors deliver high-performance linear motion in a small unit for integration into compact systems used for inspection, analysis, assembly and packaging.
Powerful drive force and low mass enable the STB11 to accelerate light loads to 25g.
The STB11 range includes strokes of up to 372mm, 46 to 92N peak force, and 3.1 to 5.2m/s maximum velocity.
Users can optimise servo position control by matching STB11 linear motors to Copley's Accelnet digital controllers.
Accelnet controllers provide powerful stand-alone and multi-axis control choices; networking options include CANopen, Ethercat, Macro and DeviceNet.
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