AccelStepper for 3 wire step motors

[Yuri Ivatchkovitch]

Hello everyone!

First of all, thanks for this lib, Mike! It is outstanding!

Well, I was trying to control a HDD spindle motor using this lib, but my motor haves 3 control wires and a common. I made some modifications to the original code to control it and the code is attached to this post - someone may be interested on using it.

I must say that I was unable to achieve high RPM on the spindle using my implementations of FULL3WIRE neither HALF3WIRE, although they work for slower speeds.

Regads,

Yuri I

[Mike McCauley]

Hello Yuri,

thanks for posting your code.
Do we have your permisison to include it in the AccelStepper mainline?
If so I should be able to add it towards the end of this week.
Do you have any info about the electrical connections for 3wire?


Cheers.

[Yuri Ivatchkovitch]

Hi!

Sure you can! I would be pleased to collaborate!!!

Doing some tests on the spindle motor, I concluded that my motor have a wiring similar to this one:

As the steps move the axis by 20 degrees the inertia of the attached things make impossible to control it at too low or high speeds... at least with the logic that I used.

Regards,

Yuri.

[Mike McCauley]

Hi,

thanks.
New version 1.28 now has your contribution. I took the liberty of making some
slight changes and adding doc.

Cheers.

On Monday, December 17, 2012 12:39:16 PM Yuri Ivatchkovitch wrote:
> Hi!
>
> Sure you can! I would be pleased to collaborate!!!
>
> Doing some tests on the spindle motor, I concluded that my motor have a
> wiring similar to this one:
>

> <http://static.electro-tech-online.com/imgcache/294-sterownik_1920.jpg>

--
Mike McCauley mi...@open.com.au
Open System Consultants Pty. Ltd
9 Bulbul Place Currumbin Waters QLD 4223 Australia http://www.open.com.au
Phone +61 7 5598-7474 Fax +61 7 5598-7070

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[Alan Bork]

I have been trying to use this library to push a HDD motor and have been using the 3-wire interfaces for that.  But I have noticed some of Yuri's code is missing from the distribution.

Please review Yuri's code on methods:

void AccelStepper::setOutputPins(uint8_t mask)

void AccelStepper::enableOutputs()

Thanks.

[Mike McCauley]

Hello Alan,

thanks for bringing this to our attention. New version 1.27 has the missing
code in it. PLs let me know how you get on.

Cheers.

> > Radiator: the most portable, flexible and configurable RADIUS server
> > anywhere. SQL, proxy, DBM, files, LDAP, NIS+, password, NT, Emerald,
> > Platypus, Freeside, TACACS+, PAM, external, Active Directory, EAP, TLS,
> > TTLS, PEAP, TNC, WiMAX, RSA, Vasco, Yubikey, MOTP, HOTP, TOTP,
> > DIAMETER etc. Full source on Unix, Windows, MacOSX, Solaris, VMS, NetWare
> > etc.

--
Mike McCauley VK4AMM mi...@airspayce.com
Airspayce Pty Ltd 9 Bulbul Place Currumbin Waters QLD 4223 Australia
http://www.airspayce.com
Phone +61 7 5598-7474

[Alan Bork]

Sorry, I don't understand your request.  

I was having problems using this library with my HDD motor and went digging into the code and checking the forums.

When I compare the latest version (1.41) with Yuri's attachments, I found code from Yuri files not in the latest version (specifically to the two methods I listed above).  Later today I will make changes locally in my development environment and will let you know if all works out.

[Yuri Ivatchkovitch]

Hey Alan!

Just to explain one thing about the implementation: it works and spins the motor, but I've never been able to spin it at high rotations. To achieve high rotations a much more ellaborated code need to be done, using the same pins as inputs to detect the motor step and synchronize the next one according to the interrupt... Or use a specialized IC.

If you get it working well, please let me know!

Regards,
Yuri I.

[Mike McCauley]

Hi,

Sorry. I meant new version 1.42 just released has the code that was missing
added into the mainline.

Please let me know if it works OK for you.

Cheers.

[Alan Bork]

I seem to be a little dense here...but I can't find out to get to the 1.42 version of code.  The main page is still linking to 1.41.

[Mike McCauley]

Ooops, our mistake.
Should be there now.

Cheers.