Re: [CAD_CAM_EDM_DRO] Re: Breakout board or cards - charge pump ?

turbulatordude wrote:

>>
>>
>
>As I understand, Mach2 is the only software that uses the feature.
>
>It outputs a frequency signal on one pin.
>
>with a comparitor, resistor and cap, you can generate a simple filter
>that will be charged with the signal and the comparitor can see the
>elevated voltage, then turn on a curcuit that would allow the rest of
>the board to be live.
>
>

Well, it is a bit different, but all three of my interfaces (analog
servo, step-direction,
and PWM) all have a watchdog circuit that causes an estop if the
computer is not
in constant communication with the board. The E-stop turns off all
auxilliary devices
(spindle, coolant, motor drives) and also stops all motion commands
through their
specific interface. This is done from EMC, but could be done with other
software,
as my inteface specs are all published.

Jon