On 12/13/2011 8:41 AM, Spiderdab wrote:
> Hi, and sorry for the ot question, but maybe your knowledge can help me.
>
> Do you know of someone selling cheap safety brakes, to be mounted on the
> back shaft of a stepper motor, with a torque of 570oz/in (about 4N/mt).
> I mean those when if current goes off they brake.
>
> Thank for any suggestion, Davide.
>
>    

"Cheap" and "Safety" don't normally go together.  ;-)

What do you consider cheap?

I'd like to find a less expensive holding brake for Nema 34 steppers, 
something in the $100 range would be nice.

I found these.

http://www.damencnc.com/en/components/motors-and-drivers/motor-add-ons/252
http://www.electroid.com/prod09.htm

Dave


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