Only 9? Too little. At ~0.36Euro per 6-pin SOT23-6 microprocessor able to handle two or three switches at the same time I think the copper in the cabling would cost more than that. But you are right, 9 signals is a bit low number to start making it electrinised. In printing industry, 9 switches is far low what you would expect on a SINGLE printing unit, in fact some new CNC-like experimental (a new production system) uses Motor, transmission, encoders, drivrs and who-knows-what-else ina single unit for EACH rotary component, like cylinders - and I tell you that's some ~100 motors with encoders, each precisely set in speed and also synchronised with each other motor! In complexity ist is insane when compared to the traditional all-mechanically set power stransmit with gearing.
I think it is the KoeBau Cortina that uses this system. A good point it has is that it makes the system more automated, less people needed for whole operation, just push buttons, no need to get dirty with oil or ink or washing agents. As for the switches, I can find a switch that could contain the microprocessor just simply wired to the switch and using the switch external terminals to communicate. You have shown me the light, I will have a look into it. Only a one miniature MCU and one capacitor are really needed in this device. Perharps a resistor or two if I am really pedant. On 4/26/08, Jon Elson <[EMAIL PROTECTED]> wrote: > Mario. wrote: > > Jon, I believe you have a very clear idea how to make a program ;-) > > So, you make serially attached switches (homing and end switches) that > > each sends his own message in the same serial line. Use a differential > > current driven twisted pair with termination at each point. Basically > > you will want many senders and one receiver. Because the events will > > be asynchronous, each sending unit needs to have a different message > > repeat frequency. Well, you can even make it analog with each switch > > turning on injecting of a specific tone into the line! What you need > > to do the most is to calculate what transmission and repeat speeds > > would be most useful. But I think about 1 Mbaud would be adequate even > > for fast homing. ... still another wonderful option is a pulse train > > technique. That one is colisionless. > > > > So, we have to have a board with a microprocessor on it for > EVERY switch? Hmm, let's see, 3 axes x 3 switches = 9 > microprocessors, all to deal with a couple pins on a connector? > No, I'm sorry, I really don't think this makes sense. > Having the right number of pins to do the job is the most > sensible scheme. > > > Jon > > ------------------------------------------------------------------------- > This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > Don't miss this year's exciting event. There's still time to save $100. > Use priority code J8TL2D2. > > http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
