Re: [CAD_CAM_EDM_DRO] stepper controller boards

Hi Dave,

Camtronics has a 3 axis, with a 4th axis option. If you can build one
axis, you can build 4!

If you do step/dir, that's 8 bits, fits nicely into the 8 bit data port.

TIP 120's (there's a whole family of 'em) are 5A, the '141 goes way
more. the allegro part is what, 2.5A?

If you build your own, there are several. From three 7400's and 12
TIP120's, and some Allegro and 297/198 designs.

I'll send you some diagrams off list.

Alan KM6VV


dave_ace_me wrote:

>
> Hi all,
>
> to some of you , this may be repetitive, but
> I'll ask anyway.
>
> I need a 4 axis stepper contrller and
> so far I only found 3 channel units.
>
> Since I am comfortable in making my own,
> does anybody know any good designs that
> would allow for good control ?
>
> Why is one style better/worse
> than another. Since I'm not up to
> servos or high power steppers,
> I'm not up to Geico's (yet)
>
> oop's Geko's, (Geico's is car insurance
> here in New Jersey)
>
> I do need to keep it all on one
> parallel port, so multiple units is
> not an option.
>
> also, it there any benefit to using seperate
> transistors (say TIP 120's) vs using a
> dedicated chip like the Allegro UNC5804 ?
>
> if this is too off topic let me know.
>
> Dave