Mariss? Dan M? Re: Bill W's question?

Hi,

OK. I drew up a nifty little circuit this afternoon that E-Stops
several DC servomotors in half a second without stress to good drives
and over-rides bad ones no matter the failure. Further, the PC can
decide to E-Stop as well if so equipped.

All it uses is is 2 momentary switches, a DPDT 115VAC relay and a 20W
wirewound resistor. It works with power supplies up to 1,500W and has
been tested as well. Worked great.

In normal operation it bleeds off the supply in 1/2 second and
provides dynamic motor braking when off.

I uploaded it in the files section under the file name "An E-Stop for
Servos"

Mariss

--- In CAD_CAM_EDM_DRO@y..., "ballendo" <ballendo@y...> wrote:
> Hello,
>
> Did I miss the answer(s)?
>
> A bit ago Bill W (list mom) asked you two what I thought was a very
> good question: (paraphrased below)
>
> "What is the best way to handle you drive(s) in an estop situation"
>
> I'd add: Let's assume there is some mass, say 100 lbs. plus. Let's
> also assume this mass is currently in the middle of a multi axis
move
> at something around(at least) 100IPM.
>
> So the question is, What are your recommendations? How do we wire
for
> estop so that we can meet safety standards, while not destroying
> Your/the drives in the process(if possible)?
>
> Thank you both in advance,
>
> Ballendo
>
> P.S. Although Bill W named Mariss and Dan Mauch specifically, I'd
> appreciate input/answers from others who are selling drives... Dave
> R, Dean, Bill, Doug(your non-geckos, obviously), etc.?