Re: [CAD_CAM_EDM_DRO] Step & Direction 3 axis board plan

Hi,

Take a look at the data sheet for the NJM3517D2 driver chip. If you don't
want much power out it could be your solution. If you require more than
500ma you will have to hang some Fet's off the back in a H-Bridge, try
IRLZ24's. These are logic level Fet's and should not require drivers to fire
them. You should also look at the L297-L298 combination to achieve the same
ends.

Terry

> Dear lister!
>
> You guys and ladies (any?) are doing a great job and since on the list I
> have learned a lot from you!
> I am in an early stage of building a tiny milling machine to use it for

fun

> (next to my printer on my desktop ;-). I have found quite some amount of
> freeware and shareware on the web and have found out that there are

several

> approaches to motion control of three stepper motors. I se that the most
> common one is step&direction approach using only two pins to control one
> motor. I would like to build a motion control card like that, but I can

not

> find any plans on the web for it. Any of you listers have them and willing
> to share them with others? I would be immensely happy to se one published.
>
> With best regards, Matjaz