Re: L298 goes boom - AWO?

Hey guys,
I assume that you can move the motors if the AWO feature is on. What
else is it used for? If I can't move the motor even when the AWO
feature is activated then man did I really waste good money cause it
defeats the purpose for me. I just kept finding myself hitting the
main power switch everything I wanted to reposition the motors (even
just a little) or do some quick manuel work, figure I am buring out
more doing that.

tauseef

--- In CAD_CAM_EDM_DRO@y..., JanRwl@A... wrote:
> In a message dated 05-Aug-02 21:05:23 Central Daylight Time,
KM6VV@a...
> writes:
>
>
> > Now what I'm wondering, if the motor currents are off in either
Gecko's
> > or a Camtronics board (or other L298 driver), is the circuit
protected
> > against spinning the motor shaft (as in using a handwheel on the
> > tailshaft of the motor)?
>
>
> Oh, I rather imagine SO! Of course! THINK about that! Who would
design a
> circuit that could be RUINED simply by spinning the motor-shaft,
with some
> switch in one position or the other??????
>
> I meant to comment on another point in this thread, earlier:
Whether it does
> harm to the driver or not, if you "unplug" a stepper with power-ON,
you will
> at LEAST get a nasty spark when the first contact "breaks", and
doing that
> once or twice will SURELY erode the contact-integrity, quite
possibly
> NOTICEABLY! Ya know the GOLD plating on those fancy "zero ohm
> computer/military-grade connectors? That is 30 MILLIONTHS of an
inch thick!
> Plug and unplug those "dry", and the gold is gone after three or
four times!
> With ten amps through it, ONCE will do-in the "zero ohm"
qualification!!!!!
>
>
> [Non-text portions of this message have been removed]