Re: [CAD_CAM_EDM_DRO] Stepper Controller

Hi Tyler,

If I may comment, I'd get a L297/298 driver, even start with just 1 or
two axis. Camtronics, can get you started. Gecko's are also a good
choice.

http://www.seanet.com/~dmauch/

Then, you want a simple 555 timer circuit to make pulses, and a toggle
switch for the direction line(s). Very simple. lets you spin the
motor(s).

Even better, IMO, would be a simple program (yup, a computer), to
generate these pulses. The parallel port can be used to connect
step/direction lines to the driver.

Just out of curiosity, why no computer? Makes simple work out of
developing pulses! And, when you later decide you'd LIKE to have the
motors follow a program to cut parts (Gcode), then the addition of a
controller program will be your next step.

A "function generator" (audio square wave generator) can provide pulses
(steps) for the motor drivers too, and they are often quite cheap. An
8038 function generator chip (used to be Intersil) can give you the base
for a generating pulses also.


Alan KM6VV

powernob@... wrote:

>
> Hello I am a new member to this group, and pretty new to the whole
> stepper motor/cnc bizz, I was wondering if someone has plans to a
> motor controller that doesnt need a computer, but rather could be used
> as a power feed of some sort... you press a button it spins one
> way(maby have a rehastat to speed or slow it down), press another
> button makes it spin the other way, and maby a button to advance one
> step at a time?
>
> Any info would be great! good group!
>
> Tyler Phillips