X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=xzAwAfV2pmBmjiQH6iTdjzxmFY5G7ZRZ2lqP3N6hC/c=; b=VrqgI37dReF6XTZWMrFMrO7D/rMHeSCGd0uvn1XX6tn6B1d5ycaVEF1S3GB+9SlCMs 9/RTtzhNN7USlabiw3xG37DS/75cj4P8oXm838Y0C3kdiZG7VPb2KdPc9FqDiaeacLGx ClDM2TvWPMHIv8vHHEhDe2b1ccN/rhp9eOpUujHiZxG19v8V78+w1uZ8f8maJUihOdZx /OxjSUiPY4QBZ3ZP6pcAZ6v8tWqoHpB+O7pxF46Fs7dg2LJZIp6emh296RoxNqEVArb4 QyF47it/2N3h9knrKMIOtuHO2CXp3Y8QII+HFGqWGSNetFksT0hfI4VnPVQqXb2mdIQd 1+sA== MIME-Version: 1.0 X-Received: by 10.52.74.161 with SMTP id u1mr23417901vdv.72.1429638478020; Tue, 21 Apr 2015 10:47:58 -0700 (PDT) Date: Tue, 21 Apr 2015 13:47:57 -0400 Message-ID: Subject: [geda-user] Stepper driver issues From: Rob Butts To: geda-user AT delorie DOT com Content-Type: multipart/alternative; boundary=bcaec5015da9a3c39505143fa56d Reply-To: geda-user AT delorie DOT com --bcaec5015da9a3c39505143fa56d Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable I know this is a geda list and this question should be asked somewhere else but I'm homebound, I haven't worked with other engineers in years and this is the only place (and best place) I know of to hash a problem out with other engineers. If anyone knows of a better forum please advise. I have a nema 23 stepper motor (to turn a trolling motor for a kayak) I want to drive in bipolar 2 phase. I'm using a Microchip 16f1939 with the On Semiconductor STK682 stepper motor driver. I have verified with a logic analyzer and oscilloscope that the output signals to the stepper are in the correct phases and the correct voltage level (I may be able to attach the screenshot). =E2=80=8B I know it is sketchy but I have 3 nema 23 steppers from ebay. 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? Thanks, Rob --bcaec5015da9a3c39505143fa56d Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I know this is a geda list and this question=C2=A0sho= uld be=C2=A0asked somewhere else but I'm homebound, I haven't worke= d with other engineers in years and this is the only place (and best place)= I know of to hash a problem out with other engineers.=C2=A0 If anyone know= s of a better forum please advise.

I have a nema 2= 3 stepper motor (to turn a trolling motor for a kayak)=C2=A0I want to drive= in bipolar 2 phase.=C2=A0 I'm using a Microchip 16f1939 with the=C2=A0= On Semiconductor STK682 stepper motor driver.=C2=A0

I have verified with a logic analyzer and oscilloscope that the output s= ignals to the stepper are in the correct=C2=A0phases and the correct voltag= e level (I may be able to attach the screenshot).
=E2=80=8B
I = know it is sketchy but I have 3 nema 23 steppers from ebay.

<= /div>
What I'm looking for is advice on how to proceed.=C2=A0 I jus= t spun a new board with the bare minimum circuitry to drive the stepper and= this output did not turn the stepper.=C2=A0 The two choices I see are purc= hasing another stepper from a reputable dealer or purchasing a ready-made s= tepper driver and associated accessories to drive the steppers then analyze= the difference between output signals.

Suggestion= s?=C2=A0 Advice?

Thanks,
Rob
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