Re: [CAD_CAM_EDM_DRO] Re: L298 goes boom - AWO?

In a message dated 05-Aug-02 21:05:23 Central Daylight Time, KM6VV@...
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!!!!!


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