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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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--20cf303637cf046585051996aec6 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable 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 --20cf303637cf046585051996aec6 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <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't working and I can'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'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'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> --20cf303637cf046585051996aec6--
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