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Author Topic: Explanation of "Charge Pump" needed  (Read 9553 times)

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Offline Jeff_Birt

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Re: Explanation of "Charge Pump" needed
« Reply #10 on: June 18, 2008, 10:09:06 PM »
I don't see how this compares to the function of a charge pump style circuit. As has been mentioned the LPT pins are in an undefined state on power up. The charge pump circuit looks for a 12.5kHz signal being out put by Mach. This signal will only be output when Mach is running and not in an ESTOP mode. You can use the output of the charge pump circuit to drive a relay and only power the drive motors when Mach is in active control AND not in ESTOP mode.

Happy machining , Jeff Birt