Stepper Motor

Overview

Stepper Motor

A stepper motor (or step motor) is a brushless, electric motor that can divide a full rotation into a large number of steps. The motor's position can be controlled precisely without any feedback mechanism (see Open-loop controller), as long as the motor is carefully sized to the application.

Lifetime

The typical lifetime for a stepper motor is 10,000 operating hours. This approximates to 4.8 years; given the stepper motor operates one eight-hour shift per day. The lifetime of a stepper motor may vary in regards to user application and how rigorous the stepper motor is run.[1]

See Also

• Open Source Stepper Motor
• Stepper Motor Controller
• Rotary Encoder
• Open Source Stepper Motor Controller
• Open Source Stepper Motor Controller Problem Statement
• Torch Table Bill of Materials
• Motor
• Wikipedia: Stepper Motor
• [2]
• Stepper Overview Youtube Video

Torque Tests

Test 1

This test used Nema17 stepper motors driven by A4988 driver boards http://reprap.org/wiki/Stepper_torque

Summary: All motors perform well at speeds < 100 revs/min. Dynamical torque starts to drop off at speeds higher than 300 rev/min. The higher the rated current and the lower the inductance, the better the performance at high speeds.

inside a stepper motor

• http://www.homemodelenginemachinist.com/index.php?topic=6748.0
• http://www.robotgear.com.au/Cache/Files/ProductImageOriginals/676_The%20inside%20of%20a%20bipolar%20stepper%20motor.jpg
• http://www.bg-cnc.com/wordpress/wp-content/uploads/2011/01/631.jpg
• http://www.designworldonline.com/articles/5409/267/New-Stepper-Motors-Beat-Corrosion-Without-Seals.aspx
• https://www.cdli.ca/courses/isys1205/unit02_org05_ilo07/b_activity.html
• http://electronics-control.info/Stepper_types.htm
• http://electronic-schematic.blogspot.com/2011/04/circuit-for-driving-stepper-motors.html
• http://www.cibomahto.com/2008/02/thing-a-day-day-20-dissecting-stepper-motors/

Types of Stepper Motors

• Hybrid 2 and 4 phase - [3]