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COBRA linear stepping motors
The linear stepper motor from ACP&D Limited represents a major advance in robotics. Gone are the requirements for linear or roller bearings, belts and lead screws for this linear stepping motor is actually built into a carriage which 'floats' on a bed of air.
The carriage contains both the magnets and the coil windings of the stepping motor and the beam (or stator as we call it) is just a length of steel or stainless steel with a series of grooves cut into it's surface. A tough polymer resin is used to fill the groves so that the stator is perfectly smooth. A pneumatic connection to the carriage operating at 3 to 5 bar ensures that the carriage 'floats' as it moves along the stator.
Click here to see the COBRA linear motor sizes available