Information
The stepper motor is a synchronous motor where the rotor can be rotated by a small angle (step) or its multiple. A full step occurs when the current is switched from one winding to the next. For a two phase motor the full step is 1.8°, for a three phase motor 1.2°. Smaller steps (up to approx. 60,000/rev) are realized by appropriate settings of the control combinations in the control boards.
The stepper motor is a brushless DC motor that rotates in defined angular steps by converting a certain number of input pulses into angular steps. Each pulse rotates the shaft by a defined angle e.g. full steps 1.8° or 1.2°, depending on the number of poles. Smallest steps up to 60,000 per revolution can be realized by means of control electronics. Operation with encoder (close-loop) as well as without (open-loop) possible.
Advantages of the stepper motor
Precise and repeatable position control and wide and accurate speed control
- Robust construction and adaptation to almost any environment
- Since there is no commutator, the motors are very reliable, the life of the motor depends on the lifetime of the bearings.
- The control is done by digital pulses in open loop, which makes the system easier to control and more cost effective.
- High starting and low speed torque
- Simple design, low maintenance, reliability
- High holding torque
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- 2 or 3 phase version
- Torque: 0.6 – 50 Nm
- Flange sizes: 28 to 130 mm
- Angle full step: 1.8°or 1.2° (electrical step division possible)
- With or without encoder (open-loop, closed-loop)
- With or without brake
- Available with associated control electronics
- Automation and robotics
- Pick-and-place equipment
- CNC machines, machine tools
- Automotive
- Conveyor technology, packaging machines, controlled valves
- 3D printer, scanner, camera autofocus systems