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        Fri, 12 Feb 2016 13:56:28 -0800 (PST)
Date: Fri, 12 Feb 2016 22:56:27 +0100
From: "Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] Stepper Driver Question
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On Fri, 12 Feb 2016 16:47:02 -0500
"P. Taylor" <phil AT plastitar DOT com> wrote:

> On 2/12/2016 4:13 PM, Rob Butts (r DOT butts2 AT gmail DOT com) [via 
> geda-user AT delorie DOT com] wrote:
> > Here is the link to the screenshot of the driver circuit:
> >
> > http://postimg.org/image/y4n3hho81/
> >
> >
> > ​
> 
> What speed of step or rotation do you expect?
> 
> That image looks very wrong to my eyes.
> 
> You can see at 3.2 kHz some down aliasing which could be the sound 
> you're hearing.  Or it could be the 10k ... whatever.  It's probably not 
> going  to spin up to the speed you're asking of it.
> 
> Phil

It would probably be good to test with a slower. I expect a limit upwards but down to zero downwards.