bipolar stepper

Posts Tagged ‘bipolar stepper’

Manually controlling bipolar stepper motor with Arduino and EasyDriver


Stepper motors are great for accurate positioning because they move in discrete steps – a feature that makes them very appropriate for CNC software control. But every once in a while you have an application where you need to press a button and rotate some kind of a jig at a preset angle or move something a preset distance if it’s a stepper-driven linear stage. So, I decided to modify an earlier Arduino sketch I wrote for testing the world’s smallest stepper motor to make it a bit more useful (and clean any bugs in the process). Keep reading to see what came out … Read the rest of this entry »

World’s Smallest Stepper Motor with Arduino and EasyDriver


This little wonder of electromechanical engineering came from inside a laser diode sled of an HP CT10L Bluray drive I’ve opened some time ago. The device on the picture consists of several parts, all easily fitting on a dime coin: a bipolar stepper motor with lead screw, a linear stage, a lens, and even an end position sensor (I’ve yet to make use of the sensor though). The entire assembly is only 14mm x 9mm x 4mm. This post is about making this tiny motor move. Keep reading! Read the rest of this entry »

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  • Larry Siegfried: I almost forgot about your article and realized that I was on my “Last” Puck that I had...
  • rodrigo: hola estoy trabajando con un scorbot er3 mi duda es: que circuito implementaste para leer los pulsos del...
  • rodrigo: hello my name is rodrigo work with a scorbot er3 and my doubt is how you got the reading of the encoders the...
  • admin: The problem with 1/8th microsteps however, is that the difference in current (or PMW pulse width, depending on...
  • admin: (darn overly sensitive Mac mouse for wiping out LONG explanation, sorry I can’t bring myself to type all...
  • greg: Thanks for your reply. It all makes sense what you are saying, although I`m not totally sure what you mean the...
  • admin: Hi Greg, thanks for stopping by my blog. You can increase the motor voltage, to add torque, but I would not...
  • greg: Hi! Thanks for publishing this, very useful thread! I just built it exactly the same way to drive a small...
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  • Filippo: Hi, thank you for this post.. Very instructive. Actually I’d have some question.. I want to use a BLDC...
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