Stepper

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Arduino Marble Roller #4 – Video

An update on the MMZ Arduino Marble Roller project.  We got the mechanics in place and a reliable system for transferring the marble to the top of the ramp via servo motor.

Because it is the job of the servo motor to simply move the platform up and down as opposed to accomplishing significant amounts of work, we counter balanced the ramp with a spring to assist the servo in lifting it.

Eli does a great job explaining it in this video:

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Arduino Bipolar Stepper Circuit

I got a cool little 4-wire bipolar stepper motor and wanted to drive it via Arduino.

I based the design on this reference: 

http://arduino.cc/en/Reference/StepperBipolarCircuit (credit for following image belongs there as well)

 

 

bipolar_stepper_four_pins

Here is how it looks for real.  Kind of a mess of wires, but you know what?  It works great.

IMG_2031