Linear motion innovator Copley Motion Systems has pioneered the use of multiple linear motors sharing the same axes to provide unparalleled performance whilst saving machine space.
The tubular linear motor, which was originally designed by Copley, is inherently well balanced because the symmetrical design eliminates attractive forces, making mechanical integration simpler. More importantly, the ServoTube range of linear motors and actuators use an integrated position sensor. As a result, an external encoder strip is not required, enabling two or more forcers to operate on the same magnetic rod.
This use of two multiple forcers makes the ServoTube motor very versatile. A dual forcer stage can provide independent control of both forcers, so that two independently controlled forcers can double productivity. With each motor controlled by its own drive amplifier, totally independent motion becomes possible. The forcers can travel in unison or in opposite directions, so for example one linear motor can be programmed to load parts while the other unloads them.