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A stepper driver is a circuit able to generate the required current to drive the stepper motor. The main function of a stepper driver is to provide the rated motor phase current to the stepper motor windings in the shortest amount of time. The rate of change of current through the windings is crucial for the stepper motor to run at optimal speed and torque. The resistive force to current change is inductance. In order for current to flow faster, it must overcome the inductive force. The inductive time constant plays a vital role in the rate at which current will flow. A low inductive time constant constitutes a faster current flow rate, while a larger inductive time constant will reduce the current flow rate. A stepper driver usually operates by chopping the input supply voltage. The stepper driver does this by using an embedded pulse width modulation (PWM) chip. Three basic stepper driver categories include L/R, Bilevel, and PWM.

Welcome to our Step Motor website.  If you are here you must be interested in Step Motor Products - either looking for information on a Step Motor, or you might manufacture or sell them.  If you are looking to buy or find information on Step Motor Products, we have provided some links.

What is a Step Motor?

First of all, there are many names for a Step motor.  They are commonly referred to as Step motors, step motors, tin can motors, pm motor, hybrid Steppers, and sometimes wrongly, servo motors.  The most common Step Motor types are listed below.

Step Motor Technical Guide

A great resource that goes over the details of the technology in how a Step motor works is thisIntroduction and Guide to the Step Motors

Step Motor Glossary of Terms

Click here for a Step Motor Glossary of Terms

Step Motor Ingress Protection Ratings (IP Ratings)

A Step Motor usually has an IP rating of IP54.  Basically this is for office environments and in industrial machinery.  If the motor is going to be used outside or in a harsh machine environment, then a higher rating is required.  Manufacturers will make these modifications in the step motor to increase it's IP Rating:  Shaft Seals, Epoxy Coatings, O-Ring Seals.

Where can I buy a Step Motor?

There are hundreds of manufacturers and companies that sell Step motor products.  Most companies do not stock motors or list there prices on the internet - one company that has a broad selection, low online pricing, and actually stocks them is Anaheim Automation.

Step Motor Standard Wire Color Codes

It would be nice if all manufacturers stuck to a standard set of wire color coded.  Unfortunately, they don't all communicate with one another and there are many different 'standards' or 'not-so-standards'.  Here is a list of different manufactures and their wire color codes.

Step Motor Guide

A great resource that goes over the finer details of the technology in how Step motors work is thisIntroduction and Guide to the Step Motors

Introduction to a Step Motor

A great resource that goes over the finer details of the technology in how Step motors work is thisStep Motor Introduction.

How Much does a Step Motor Cost

The price of Step Motors varies based on many factors.  They come in many different shapes and sizes.  You can always but high quality Step Motors, but they are many other low cost versions available as well.  Be careful buying the inexpensive ones, as they often suffer from low quality and will not last nearly as long as the higher quality Step Motors.

 

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