Re:Low cost 6A stepper drivers on eBay

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Ron Ginger" <ronginger@a...>
wrote:

> >The gecko microsteppers are about 5 times the price of these basic
> >drivers. While I accept that "you get what you pay for" surely

these

> >are not complete junk? I thought the resonance issues only happened
> >at certain speeds (or load/speed combinations?). If this is the
> >case, would it be a practical approach to go with these and work
> >around the resonance issues by adjusting feed/speed until I can
> >afford the upgrade to the microsteppers?
>
>
> With these cheap dirivers you will get less than 10% of the motors

ability

> applied to your work. So to save a few bucks on the driver you

waste all of

> the moeny you spent on the motors.
>
> At the prices of decent, microstepping, PWM type drivers doing a

unipolar

> (LR) drive today is foolish. gecko, xylotx or pmdx all make much

better

> drivers.
>
> ron ginger

I am surprised it took so long for someone to mention the voltage
difference.

I keep seeing people using 6 volt motors with 24 volt drives.


BTY, I am working with another guy in putting together a PIC based
stepper driver, low amp, electronics hobbyist use not machine tool
use.

Anyway, we were talking about putting together a way to test motors.

What I was thinking was something anyone could do at home.

A 1 inch OD drum, stranded wire of some ga. Yes there will be a
slight error from the diameters, but this is not precision, but a
comparison based test.

(all those printers I trashed... all that wire.... dang.)

Mount the motor on a plate so it can hang from the ceiling and
connect a can or jar to it.

Then fill the jar with water or pennies or some such and use that as
a means of testing motors.

The idea is not so much as a very accurate way of determining torque,
but more so someone can rate different voltages and drives and
compare motors and such.

For my unit, I am thinking about making it for both direct drive and
also a belt drive.

The idea is to keep it as simple as practical, but still be
functional.

Any comments on a simpler way or how to make it better ?

Dave