I've developed a circuit just for this application: https://dl.dropboxusercontent.com/u/34705319/Spindle Drive Interface Schematic.pdf
It does a fairly decent job. It gets within ~0.5% of full scale on both ends and has a linearity error of ~0.5%. In addition it has a couple of opto isolated control/feedback signals for spindle enable and a 'at speed' indication. Here are the Eagle files for it if you'd like to crib them: https://www.dropbox.com/sh/solnou6bjixmmp7/3b3ChzN0Wk I've even got a few bare PCBs and a couple of populated ones if you'd like to buy one. N. Christopher Perry On 2014-Feb-16, at 00:07, Jared Turner wrote: > I'm still working with trying to get programatic speed control from my BBB. > My driver requires a 0-10v signal or a 10k pot to control speed. Had to take > a break from this - schoolwork is kinda inconvenient at times - found out my > digital pot can't work for 10v signals... so I'm thinking about implementing > an op-amp and ramping up the output of the BBB to 0-10v. My other option is > to connect a servo/stepper motor to a pot which seems a little silly. I'm > just wondering which is easier... > > ------------------------------------------------------------------------------ > Android apps run on BlackBerry 10 > Introducing the new BlackBerry 10.2.1 Runtime for Android apps. > Now with support for Jelly Bean, Bluetooth, Mapview and more. > Get your Android app in front of a whole new audience. Start now. > http://pubads.g.doubleclick.net/gampad/clk?id=124407151&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Android apps run on BlackBerry 10 Introducing the new BlackBerry 10.2.1 Runtime for Android apps. Now with support for Jelly Bean, Bluetooth, Mapview and more. Get your Android app in front of a whole new audience. Start now. http://pubads.g.doubleclick.net/gampad/clk?id=124407151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
