Re: G201-IP

I recentally bought some G320's , one wouldn't work (fault light
stayed on) I pulled off the cover and found that the locking washer
that is supposed to be under allen screw actually had been misplaced
to the side and tightend down against some resistors nearby. Just
thought you guys would want to know.

--- In CAD_CAM_EDM_DRO@y..., "mariss92705" <mariss92705@y...> wrote:
> Hi,
>
> 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.
>
> The circuit works internally on the "DISABLE" input (term. #7) of
the
> drive. Any of these faults would latch it low (disable). It would
> then require a recycling of the power supply to clear the fault.
> The "Fault" indication would be a "0" on the "DISABLE" terminal.
>
> The "IP" in G201-IP stands for "current protect", or as a cruel
> individual here pointed out, it can also read "Idiot Protect".
>
> This circuit (about 20 additional components to the existing 136)
> would require a major revision (REV-8). Of course it would be 100%
> compatible, pinout, function and form, with all previous drives.
>
> What I am throwing out to the group here is:
>
> (1) Is it worth the effort to do this?
> (2) Is it worth a $15 premium to do have this protection? That is
the
> all-up cost of the additional parts.
>
> We will continue to produce the G201 regardless if there is or is
not
> a G201-IP. It will not in any way supplant it.
>
> The G201-IP might be useful for those that are using the drive for
> the first time and want a little extra margin against Mr. Murphy
and
> his Law. Later, after everything has settled out, stock G201s would
> serve as well. Others that are a little more tense/prudent may wish
> to have it as protection against Mr. Murphy should he call
uninvited
> at a later time.
>
> If I'm going to do this, my schedule has it for the end of the
first
> quarter. What I'm looking for is feedback if this is wanted/needed.
>
> Thanks.
>
> Mariss