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Subject: Re: [geda-user] Stepper Driver Question
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From: John Griessen <john AT ecosensory DOT com>
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Date: Fri, 12 Feb 2016 15:25:01 -0600
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On 02/12/2016 03:13 PM, Rob Butts (r DOT butts2 AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
> screenshot of the driver circuit:

out-1a, out-1b overlap.  That can give motion.  There needs to be overlap to get all the way around the "motor windings circle", 
then it can move.  Otherwise, it might just go some, then snap back, go some -- repeat.  And sound loud like you said.