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documentation photos

December 10, 2007 in documentation by ml1949

1, getting motors from a typewriter. that’s where our motors come.

where our motors come from

2, wiring the 2 stepper motors. Both of them areunipolar.

The unipolar stepper motor has five or six wires and four coils (actually two coils divided by center connections on each coil). The center connections of the coils are tied together and used as the power connection. They are called unipolar steppers because power always comes in on this one pole. (source: http://www.tigoe.net/pcomp/code/category/code/arduinowiring/51 )

wiring with transistor array

3, connecting the encoder

http://www.nubotics.com/support/index.html

2 steppers to arduino

4, soldering onto little piece of perfboard to make the plug-in modula on arduino

encoder

5, test the encoder, and we got accurate readings: every rotation of the steppers, the encoder increments “62″

stepper motor's tricky counter

6, first version of housing gears, motors and encoder.

housing first version (thanks to mexico clay )

6, final version of housing

DSC02052

7, standing up (here is the tricky thing.the gravity made the gears works a little bit different, when moving towards up, like 9 o clock, the pointer stepping may loose steps, so we did re-housing, making it more secure and stable, and checking motors again)

DSC02066

8, spray the face and mount onto the clock.

DSC02069


http://flickr.com/photos/beyondmeng/tags/final/

 

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