Re: [CAD_CAM_EDM_DRO] PC Control of Motion

ballendo@... wrote:

> Stan wrote,
>
> >3.5) Panic stop also kills current to stepper motors (hardwired).
>
> 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

Another scenario here might be when the disconnect relays drop power to the servos that the z switchs to a hardwire mode to retract
the spindle/knee and get the cutter clear.

Dave

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