Polarity test

Note

Protection of the linear servomotor

Before the test, make sure that the linear motor system has suitable electrical and mechanical protection.

There is one way of checking the polarity. By means of moving the carriage it is possible to determine whether the direction of movement of the motor corresponds to the count direction of the feedback. If this is the case, the motor is connected correctly. Otherwise, two phases in the motor cable - phases 1 and 3 - must be swapped.

All linear servomotors from Beckhoff are wired and connected in exactly the same way, so that a single test is sufficient in order to determine the polarity of a motor/graduated rule combination. If more than one axis is being constructed in a similar way, the polarity will be identical.