more data ( Re: 2 Fried G210's in a single day :-(

Hi Paolo,

this was a problem back in the early days of variable speed motor
speed controllers. if you installed an overload or disconnect
between the motor and the drive and it opened, the drive smoked.

it seems that the process is to get a stepper to move, then to do it
with power, then accuracy, then repeatability, then high power, then
timing and features, then refinment, then protection. seems we are
not up to ultimate protection as yet. seems we have to break them
first so the designers know how to add protection. (sometimes from
ourselves)

This thread is some protection to those who have not learned your
expensive lesson. Thanks for giving us the warning.

--- In CAD_CAM_EDM_DRO@y..., "pavel59" <pavel@k...> wrote:
>
> > bty, do you put in led's across the fuses ? makes it easy to spot
> a
> > bad fuse and offers you that warning that the circuit is hot.
> >
>
> the led looks like a good idea, I will surely implement it soon.
> But, if I'm not misunderstanding your words (sorry, English is not
> my main language) the main argues relate to overcharging the
> circuits.
> This never was my case, I broke my G201 without overcharging them,
> they didn't run a single step when powering the system.
> There have been surges, spikes or false contacts (I believe) which
> caused the unit to die.
> I think that something happened like disconnecting the motor (or
the
> G201 if you like) with the whole circuit powered up and running.
> I know I'm advised not do do that ! ! ! ! ! but, when a component
> fails and its failure leads to that same condition (disconnecting a
> phase of the motor for a fraction of a second), then I would like
to
> see a protection preventing the G201 by dieing.
>
> Thanks
>
> Paolo