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Date: Sun, 28 Jun 2015 12:43:58 -0400
Message-ID: <CALSZ9gqtmaetZs7rHrx_sTrc1vqKkMMvDhPf0P9vs4EmuC9Q3w@mail.gmail.com>
Subject: Re: [geda-user] Stepper driver issues
From: "Rob Butts (r DOT butts2 AT gmail DOT com)" <geda-user AT delorie DOT com>
To: geda-user AT delorie DOT com
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Sorry to keep hammering this stepper driver issue on the geda board but my
collaboration options are very limited.

This kayak steering via a nema 23 stepper is driving me BONKERS!  I had it
working prior to last summer but then spent 4 months in the hospital
critical, got out, worked on the shifting code, now the steering isn't
working and I can't figure out for the life of me what changed!

To sum up: I am using the Pololu DRV8825 stepper driver that I set up on a
bread board with a microchip pic16f1937.  I have verified with an usb logic
analyzer that all the control signals to the drv8825 are correctly
programmed and that the output A+, A-, B+ and B- signals are what they are
supposed to be without the stepper connected.

I then connected a new stepper and it made a soft whining sound but did not
turn.  I am certain it is wired correctly.  Now the stepper does not appear
to work.

I am sure I ordered a 12V 2.0 A stepper but looking at the motor tag it
says 1.2V and 2A which probably explains why it didn't work and is now not
working.

Does anyone know of a good source for a nema 23 stepper motor?  The drv8825
is rated for 2A and my kayak trolling motor is not difficult to turn so I
don't believe it needs to be high holding torque.

Any help will be GREATLY appreciated!
=E2=80=8B
Thanks,
Rob

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<div dir=3D"ltr"><div>Sorry to keep hammering this stepper driver issue on =
the geda board but my collaboration options are very limited.</div><div><br=
></div><div>This kayak steering via a nema=C2=A023 stepper is driving me BO=
NKERS!=C2=A0 I had it working prior to last summer but then spent 4 months =
in the hospital critical, got out, worked on the shifting code, now the ste=
ering isn&#39;t working and I can&#39;t figure out for the life of me what =
changed!</div><div><br></div><div>To sum up: I am using the Pololu DRV8825 =
stepper driver that I set up on a bread board with a microchip pic16f1937.=
=C2=A0 I have verified with an usb logic analyzer that all the control sign=
als to the drv8825 are correctly programmed and that the output A+, A-, B+ =
and B- signals are what they are supposed to be without the stepper connect=
ed.</div><div><br></div><div>I then connected a new stepper and it made a s=
oft whining sound but did not turn.=C2=A0 I am certain it is wired correctl=
y.=C2=A0 Now the stepper does not appear to work.</div><div><br></div><div>=
I am sure I ordered a 12V 2.0 A stepper but looking at the motor tag it say=
s 1.2V and 2A which probably explains why it didn&#39;t work and is now not=
 working.</div><div><br></div><div>Does anyone know of a good source for a =
nema 23 stepper motor?=C2=A0 The drv8825 is rated for 2A and my kayak troll=
ing motor is not difficult to turn so I don&#39;t believe it needs to be hi=
gh holding torque.</div><div><br></div><div>Any help will be GREATLY apprec=
iated!</div><div>=E2=80=8B</div><div>Thanks,</div><div>Rob</div></div>

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