i donn't want to recieve all this messages On Thu, Feb 3, 2011 at 12:45 PM, Przemek Klosowski < przemek.klosow...@gmail.com> wrote:
> On Thu, Feb 3, 2011 at 10:13 AM, Viesturs Lācis > <viesturs.la...@gmail.com> wrote: > > > My waterjet machine has ultrasonic sensor that outputs 4-20mA analog > > signal, I have microcontroller which converts that to 0-10V analog > > signal (please, do not make my mistake and just get a sensor that > > outputs 0-10V directly), then comes voltage-to-frequency converter and > > then the frequency signal goes to EMC2 > > Wouldn't the 0-10V output be vulnerable to noise from the plasma arc? > Both the current loop and frequency should be fairly noise-immune, so > it seems to me that the best choice would be a direct frequency > output, then the 4-20mA and the voltage output, in that order. > > How important is the height control? If not very, would it work to > have a retractable pogo-stick for initial height setting: > > - solenoid deploys a pogo stick downwards alongside the spindle (jet > head/plasma tip) > > - controlled downward Z jog until contact with material (or even a > contact closure of a microswitch on the tip of the pogo stick) > > - retraction of the pogo stick for the work cycle > > > ------------------------------------------------------------------------------ > Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! > Finally, a world-class log management solution at an even better > price-free! > Download using promo code Free_Logger_4_Dev2Dev. Offer expires > February 28th, so secure your free ArcSight Logger TODAY! > http://p.sf.net/sfu/arcsight-sfd2d > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
