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	Tue, 21 Apr 2015 12:22:58 -0700 (PDT)
Message-ID:	<5536A38F.50104@m0n5t3r.info>
Date:	Tue, 21 Apr 2015 22:22:55 +0300
From:	Sabin Iacob <iacobs AT m0n5t3r DOT info>
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To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] Stepper driver issues
References:	<CALSZ9goH9CUT=5DStdVUG4d45ff30WieHc2-DsXpjX=7cf42Nw AT mail DOT gmail DOT com>
In-Reply-To:	<CALSZ9goH9CUT=5DStdVUG4d45ff30WieHc2-DsXpjX=7cf42Nw@mail.gmail.com>
Reply-To:	geda-user AT delorie DOT com

On 04/21/2015 08:47 PM, Rob Butts wrote:
> [snip]
> What I'm looking for is advice on how to proceed.  I just spun a new
> board with the bare minimum circuitry to drive the stepper and this
> output did not turn the stepper.  The two choices I see are purchasing
> another stepper from a reputable dealer or purchasing a ready-made
> stepper driver and associated accessories to drive the steppers then
> analyze the difference between output signals.
>
> Suggestions?  Advice?
>

You didn't mention if you checked the basics:

* Can you spin the rotor by hand when it's disconnected? if not, it's
probably seized up for some reason (rust inside?).
* Have you checked winding continuity?
* Are the windings connected properly? if 2 of the wires are mixed up,
you'd either get both ends of a winding at the same potential or an open
circuit, depending on how it's driven.

hth

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