Unipolar Microstep Driver Schematic

[Heyme]

I am looking for a simple microstep motor controller to drive a 5 wire
unipolar stepper motor (4 phase wires, 1 commmon). The stepper draws less
than .5 amps at 24VDC. I prefer a stand alone solution with a trim pot for
speed control, with the posiblility of adding a couple switches to select a
high speed, low speed and reverse.

Using a PIC uC is a posibility, but maybe a bigger time investment than I
have right now.

Any ideas? Any good sites to check out. I've been googling for a couple
of days now and seen many kits, but not much in the way of a schematics, or
suggestions.

Thanks

 

[john jardine]

"Heyme" <hey__me@hotmail.com> wrote in message
news:Xns95C3B906278D9heymehotmailcom@216.221.81.119...

I am looking for a simple microstep motor controller to drive a 5 wire
unipolar stepper motor (4 phase wires, 1 commmon). The stepper draws less
than .5 amps at 24VDC. I prefer a stand alone solution with a trim pot
for
speed control, with the posiblility of adding a couple switches to select
a
high speed, low speed and reverse.

Using a PIC uC is a posibility, but maybe a bigger time investment than I
have right now.

Any ideas? Any good sites to check out. I've been googling for a couple
of days now and seen many kits, but not much in the way of a schematics,
or
suggestions.

Thanks

Goto Google, "Images" and type "stepper unipolar" (no quotes). Look at the
first drawing.
regards
john

 

[Heyme]

Goto Google, "Images" and type "stepper unipolar" (no quotes). Look
at
the
first drawing.
regards
john

That AC coupling to the darlingtons is interesting...

Yeah ... makes sense ... Detent holding etc ... Never thought anyone
would want a battery operated stepper!.
regards
john

Well that is basically the full step circuit that I have started with.
Found something similar on a different web site that still uses the 194
chip, but uses 2003 darlington drivers. Anyhow that is a very nice
standalone full step circuit that I have currently built and using, but I
need finer steps and smoother operation. Any other suggestions? I found
the linistepper on piclist. Anyone have experience with this kit?

 

[Spehro Pefhany]

On Sat, 18 Dec 2004 23:39:16 -0000, the renowned "john jardine"
<john@jjdesigns.fsnet.co.uk> wrote:

"Heyme" <hey__me@hotmail.com> wrote in message
news:Xns95C3B906278D9heymehotmailcom@216.221.81.119...
I am looking for a simple microstep motor controller to drive a 5 wire
unipolar stepper motor (4 phase wires, 1 commmon). The stepper draws less
than .5 amps at 24VDC. I prefer a stand alone solution with a trim pot
for
speed control, with the posiblility of adding a couple switches to select
a
high speed, low speed and reverse.

Using a PIC uC is a posibility, but maybe a bigger time investment than I
have right now.

Any ideas? Any good sites to check out. I've been googling for a couple
of days now and seen many kits, but not much in the way of a schematics,
or
suggestions.

Thanks

Goto Google, "Images" and type "stepper unipolar" (no quotes). Look at the
first drawing.
regards
john

That AC coupling to the darlingtons is interesting...