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What is a stepper motor?

A stepper motor drivers is an electromechanical device which converts electrical pulses into discrete mechanical movements. The shaft or spindle of a stepper motor rotates in discrete step increments when electrical command pulses are applied to it in the proper sequence. The motors rotation has several direct relationships to these applied input pulses. The sequence of the applied pulses is directly related to the direction of motor shafts rotation. The speed of the motor shafts rotation is directly related to the frequency of the input pulses and the length of rotation is directly related to the number of input pulses applied. Here we recommen you leadshine stepper drive for you.

The dm556 leadshine digital is a high performance microstepping driver based on pure-sinusoidal current control technology. With this technology and the self-adjustment technology (self-adjust current control parameters) for different motors, the drive motors can run with smaller noise, lower heating, smoother movement and have better performances at higher speed than most of the drivers in the markets. It is suitable for driving 2-phase and 4-phase hybrid stepping motors, so the Nema17--Nema34 stepper motors with a 1.0A-4.5A current will be suitable.

Types of Stepper Motor:

There are three main types of stepper motors, they are:

Permanent magnet stepper
Hybrid synchronous stepper
Variable reluctance stepper

Permanent Magnet Stepper Motor: Permanent magnet motors use a permanent magnet (PM) in the rotor and operate on the attraction or repulsion between the rotor PM and the stator electromagnets.

Variable Reluctance Stepper Motor: Variable reluctance (VR) motors have a plain iron rotor and operate based on the principle that minimum reluctance occurs with minimum gap, hence the rotor points are attracted toward the stator magnet poles.

Hybrid Synchronous Stepper Motor: Hybrid stepper motors are named because they use a combination of permanent magnet (PM) and variable reluctance (VR) techniques to achieve maximum power in a small package size.

Advantages of stepper motors compared with other motors

In contrast to other motors stepper motors have a high holding torque even at low speed, and even on standstill. Another advantage is the simple control of stepper motors: Alternate energising of the individual coils causes the motor to move step by step. The fixed number of steps per revolution always enables the current position to be determined if the steps are counted and the motor is operated within its performance limits. No encoder is required for simple positioning tasks within the performance limits. Stepper motors are therefore ideally suited as cost-effective solutions for simple positioning tasks.

Stepper motors are used infloppy disk drives, flatbed scanners,computer printers, plotters, slot machines,image scanners, compact disc drives,intelligent lighting, camera lenses, CNC machines and, more recently, in 3D printers.