Re: [CAD_CAM_EDM_DRO] PC Control of Motion

I have put e-stop double throw relays directly in the motor windings. The common and normally closed terminals are connected
directly across the motor and then power is feed to the normally open terminal.

During normal operation, the relays are activated and everything works just as normal. During e-stop or power failure, the relay
drop and puts a short across the motor and the motor will dynamically break in a fraction of a second.
Bertho Boman
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ballendo@... wrote:

> Stan,
>
> Keep in mind that killing the power to the motors (stepper or servo,
> unless braked) will allow a presently cutting tool to climb,claw and
> grab into whatever it can reach as the spindle(definitely hard-wired
> to the estop) is winding down. Rack and pinion drive and Ballscrews
> allow this to happen the most, followed by high lead leadscrews. Be
> careful and THINK about what will happen when things are going badly,
> You may not want to kill those motors until the spindle has stopped!
>
> Ballendo