> I assume that your stepper is rated for this current?
it's rated for 2.0 amps, but I needed to limt it to 1.25 for the
5804 controller

> Even a 10 watt resistor will get very hot at this power level.
how can I make it cooler, and use this controller chip??  is there
a way?

. This sounds like
> excessive power to be throwing awy unless you are really really keen on
> performance and cannot get it any other way.
This motor is for a sherline mill, a cnc setup, so performance is an issue?

I don't really understand what voltage is OK or what voltage should be used
for this motor.  On the list of specs, it says 3.2V.  What is this? a
minimum?

I guess 2.0 amps is all you need to worry about.  Then the power generated,
or heat to be dissapated away somehow?  is this true?


thanks very much
>
> > ANY help is much appreciated, thanks
> >
>
>
> > Second, the motors seems to jump around occasionally, my program
> > steps 400 steps in one direction, then reverses and steps 400 steps the
> > other way. ( this thing is 1.8deg step angle, set on half step)
>
> Whether this will work depends on what your stepper is specified at for
the
> given load. At 20/ms/step that's 50 steps/second which is well within the
> capabilities of many (most?) stepper motors DEPENDING ON LOAD. What speed
> you can step at at a given torque/load and a given power level will be
> specced by the manufacturer. Is this essentially unloaded or with some
load?
> If loaded, what is the load?
>
>
>         RM
this I don't understand at all

the load right now is a piece of tape, so I can see the shaft move.
(it is continuously running though)

looking at the spec sheet, I see a 'motor torque curve' chart for a
given driver/current/exciting mode/inertial load
where torque is on the y axis and frequency(pps) on the x axis?

do you have a quick explanation of these units?
frequency(pps) what does this stand for and is it steps per time
unit -somehow??

and torque (kgf-cm) - this isn't in my memory banks either...

thanks very much again.

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads