Slavko Kocjancic pravi: > Sven Wesley pravi: >> 2010/3/30 Slavko Kocjancic <esla...@gmail.com> >> >> >>> Sven Wesley pravi: >>> >>>> I have a strange behaviour on a machine. I have a breakout board >>>> (Rutex >>>> components), when the EMC2-computer starts the mill motor will start >>>> >>> right >>> >>>> away. When I start EMC2, it stops. The odd thing is, when I exit >>>> EMC2 the >>>> motor will stay off. >>>> I have tested both active high and low, could it be a "leaking" output >>>> >>> pin? >>> >>>> I guess it might be fixed with a grounded drop signal resistor. >>>> What do >>>> >>> you >>> >>>> think? >>>> >>>> Regards, >>>> Sven >>>> >>>> >>> That's pretty normal. (sadly). When you start computer the BIOS check >>> port and that's set's some random data at the port. The spindle cannot >>> be (safe) controled by lpt port. It's needs another layer of safety. >>> >>> The easyest and safe is chargepump. So to run the spindle the PC must >>> output stream of pulses long enought to energyze relay. In hal is >>> chargepump component so it's easy to use it. The hardware to do that is >>> in most cases just two diodes and two capacitors added into circuit. >>> >>> I use two of such relay's (with chargepump) >>> >>> One is for turning on the driver power supply >>> Other is for turning on router. >>> >>> The Estop switch (NC) is wired to power relays. >>> >>> So to turn on the standar procedure is Relase Estop (before or later >>> turning on EMC computer / doesn matter) >>> Hit F2 to turnon chargepump for relay1 and realy turnon power for >>> motors >>> relay 2 is under M3 M5 control. >>> >>> so if computer hangup the power for spindle and motors are cutoff same >>> if the estop is pushed. >>> >>> Don't use direct signal from port to turn on board/spindle. >>> Just imagine that you have manual toolchange and just changing tool and >>> there is power glitches just long enought to reset pc. (and turn on the >>> spindle with your hands on it.) >>> aniway the cnc controller should shut off in that condition but I >>> didn't >>> see that in smal benchtop machines. Not good news for our fingers. >>> >>> Slavko. >>> >>> >>> >> I'm not sure I'm following you, it sounds like your solution is a >> relay that >> controls a relay, and then the problem remains?.. >> It sounds like an odd deal that a common breakout board shouldn't handle >> glitching on/off. >> >> Sven >> >> Forgot to say that other pair from estop is wired to input pin so emc know the state of estop.
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