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	Fri, 12 Feb 2016 12:36:51 -0800 (PST)
Date:	Fri, 12 Feb 2016 15:36:51 -0500
Message-ID:	<CALSZ9grFdpWEWyU2LFhoDfSYCmXatFohBFyxNGfXdS-SnZ7pBw@mail.gmail.com>
Subject:	[geda-user] Stepper Driver Question
From:	"Rob Butts (r DOT butts2 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To:	geda-user AT delorie DOT com
Reply-To:	geda-user AT delorie DOT com

--089e014952388a45ad052b98a010
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Please let me know if I should ask this question somewhere else as this is
the geda forum.

I designed a circuit board to drive a nema 23 stepper motor via On
Semiconductor's STK682 Motor Driver.  The output to the 4 wire bipolar
stepper is according to spec however, when I connect any of 3 stepper
motors to the output my tech, in his early 20s, can hear a high pitch tone
but the motor is not turning.

Extremely frustrated I purchased On Semiconductor's STK682 Stepper Driver
Evaluation board.  I am driving that board with a simple microchip
processor board.  I have the exact same output AND the exact same results.

I can't attach the screenshot of the evaluation board io.

Any suggestions?

Thanks

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<div dir=3D"ltr"><span style=3D"font-size:12.8px">Please let me know if I s=
hould ask this question somewhere else as this is the geda forum.</span><di=
v style=3D"font-size:12.8px"><br></div><div style=3D"font-size:12.8px">I de=
signed a circuit board to drive a nema 23 stepper motor via On Semiconducto=
r&#39;s STK682 Motor Driver.=C2=A0 The output to the 4 wire bipolar stepper=
 is according to spec however, when I connect any of 3 stepper motors to th=
e output my tech, in his early 20s, can hear a high pitch tone but the moto=
r is not turning.</div><div style=3D"font-size:12.8px"><br></div><div style=
=3D"font-size:12.8px">Extremely frustrated I purchased On Semiconductor&#39=
;s STK682 Stepper Driver Evaluation board.=C2=A0 I am driving that board wi=
th a simple microchip processor board.=C2=A0 I have the exact same output A=
ND the exact same results.</div><div style=3D"font-size:12.8px"><br></div><=
div style=3D"font-size:12.8px">I can&#39;t attach the screenshot of the eva=
luation board io.</div><div style=3D"font-size:12.8px"><br></div><div style=
=3D"font-size:12.8px">Any suggestions?</div><div style=3D"font-size:12.8px"=
><br></div><div style=3D"font-size:12.8px">Thanks</div></div>

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