Re: STEPPER CONTROLLER FOR A NEWBIE

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "wthierry1970"
<wes_thierry@h...> wrote:

> Im new to everything here, and have self taught myself basic
> electronics and circuits using a basic stamp. I was wondering if

it

> is possible to create a stepper motor control from off the shelf
> components that are readily available. I have some basic 555 IC's
> and other components, Im trying to wire up a NEMA 17 size stepper
> salvaged from an old cannon facx machine.
>
> Or is there a stepper controller built into the fax machine board
> that I can identify and re-use the parts from.
>
> Thanks
>
> Wes

Hi Wes,

yes to both questions.

there is most likly a driver chip in the fax machine that you can
use, but if it is like my HP laser, the chip uses a phase type pwm
signal so it is not as simple to use as the step and direction we
often talk about.

check for a chip with 20 or so pins, that is heatsunk, or is a larger
form factor. checking chips on digi-key or www.findchips.com or
something.

As far as home brew, you can single step a stepper with an H-Bridge
so that makes it a simple starting point.

The Linistepper is a possible home brew project.

I even think there are some schematics in the files section.

Once you find your chips, search the archives for discussions about
it. There are pretty many threads for each topic.

Dave