Lester, I first tried to get the required 12V from the kbic, but as this is only provided for with a zener (according to the schematics), it dropped to 6V as soon as the C11 board was connected. So bad option.
As in the meantime the 5V-12V dc converter arrived (indeed from Farnell), I used that one to provide the 12V. Works like a charm. Thanks for the hint. Regards, Geert Lester Caine wrote: > Geert De Pecker wrote: >> I probably wrongly assumed that the voltage should come from the KBIC >> board. As you say, this would indeed be a flexible solution. Will look >> out from such a converter. My controller case is almost full, have to >> find some room to put this one in :-) > Don't need much space - this fits neatly on the end of the board > http://www.farnell.com/datasheets/78477.pdf > It's a pity that there is not a space for it actually on the board. > >> Lester Caine wrote: >>> Geert De Pecker wrote: >>>> Next problem: the analog voltage on the C11 board doesn't go to the max >>>> input voltage. I measured the voltage across the sherline potentiometer >>>> and it is 9.2 volts. With the bench supply set to 9.2 and attached to >>>> the analog voltage of the board, the max output is 8.2 volts. I'll see >>>> what is gives when I try ot on the sherline speed control. >>>> >>>> Otherwise, the output voltage is very linear with the ordered spindle >>>> speed. >>> You will need a higher isolated supply. I use a little 12v to 12V DC >>> converter >>> to give the isolated supply, and just limit the range of the input. >>> Sounds as if you are nearly there though. > > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
