Re: [CAD_CAM_EDM_DRO] G201-IP

mariss92705 wrote:

> I have breadboarded a protection circuit for the G201. It protects
> against:
>
> 1) Shorting any or all motor wires to ground.
> 2) Shorting any motor phase to phase.
> 3) Miss-phased motors (series or parallel).
> 4) Miss-connected motors.
> 5) Internal motor winding shorts (serial-killer motors).
> 6) Motor connects/disconnects while under power.
> 7) Motor winding short to motor case.
> 8) Unused 6-wire motor leads touching/shorting anywhere.
>
> These are the most common drive failure problems (>95%) that we see
> for return/repair.

Good idea. But what about protection against supply disconnect (fuse
blown)? An additional zener diode would do that turns one of the power
transistors on and clips the voltage peak out of the motor inductance
when this happens. Of course there is the risk that users with
undersized buffering elkos trigger this curcuit too often and overheat
the transistor.

Ciao
Bene

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