StampWorks Ex. #27: Stepper Motor Control

Bill Chennault

All--

I am working with Stampworks and have reached "Experiment #27: Stepper Motor Control." My environment consists of a PDB, BS2, and an inex 7.5 degree, 12V, 100 ohm, uni-polar stepper motor. The inex stepper has a 6 pin connector which I have wired into the L293D driver by simply plugging wires into the inex connector and then screwing them down via screw connector provided in the L293D driver area of the PDB.

All I can get the little stepper to do is what looks like one step forward and one step backward, repeatedly. The speed with which it performs this "two step" appears to be related to the pot setting, as it should.

Is this one forward, one reverse oscillation characteristic of something I have OBVIOUSLY done wrong, or is the problem deeper? I have tried reversing the phase wires as suggested in Stampworks, page 155, to no avail (and apparently to no affect, either).

I would appreciate any input.

Thanks!

--Bill

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You are what you write.

Lithium_fun!

Sounds more likely to be a buggy program or circuit, but you could have a fried motor/chip somewhere (hopefully the first)

Bill Chennault

Lithium_fun!·and All--

It was a simple matter of connecting the stepper motor incorrectly. Thank you for taking the time to think about my problem!

--Bill

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You are what you write.