 Beckhoff Automation (Pty) Ltd
Stepper Motors
Stepper Motors are synchronous motors with a high number of poles, which can therefore be regarded as direct drives. Advantages include high holding torque and very good positioning capability. Individual steps or partial steps can be approached directly (i.e. without return system) through intelligent control of the stator windings in full step or microstep mode. This distinguishes Stepper Motors from servomotors and makes them a cost-effective alternative. Excessive acceleration and fast load cycles can result in the stepper motor no longer being able to follow the rotary field and „losing steps“. The encoder option can improve matters in this situation.
Stepper Motors have their maximum torque in the lower speed range and an overriding holding torque at standstill. In many applications this makes a holding brake unnecessary. The stepper motor Bus Terminals from the Beckhoff I/O system can store suitable current curves for any speed or load profile, for optimum adjustment of the thermal motor load.
Beckhoff Stepper Motors are used as actuators or auxiliary axes in machine construction and automation applications. In conjunction with the KL2531 and KL2541 stepper motor Bus Terminals and the TwinCAT automation software, cost-effective axes can easily be integrated into the overall application.
In order to simplify the electrical connection, the Stepper Motors are equipped with pre-assembled plug connectors. Planetary gear units, incremental encoders and pre-assembled connection cables are available as accessories.
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