On 09/05/2013 12:04 AM, Michael Haberler wrote: > > Am 05.09.2013 um 08:28 schrieb Paul Lacatus <[email protected]>:
... snip >> I bought a BBB card for using on my little MF70 CNC. I am looking for a >> while on internet but did not found anything about using a BBB with a >> cape or connection to emulate the parallel port by BBB GPIO. I have seen >> the BeBoPr or K9 Smorgasboard that emulates the parallel port but >> there is not an inexpensive solution ? Only some logic level converters? > > that'd be very useful to have, I guess many people could make use of such a > cape > > I heard Alex Joni thinking aloud about creating one.. Alex? > > next best thing is buying a breakout cape like this: > http://www.adafruit.com/products/572 and grabbing the soldering iron ;) > > > - Michael I tend to have signals that need 5, 12 or 24 Volts, on any pin, so I would vote for a board with a 3 to 5 Volt buffer/converter out to a screw or screw/clamp terminal. From here I can add an opto-isolator, level converter, or some other signal conditioner per circuit as needed. I haven't looked at analog I/O or encoders at all. For add-on or built in, I would like to have Modbus (for VFDs) and fast PWM (for PWM amps). Another feature influence might be the application. I still don't see a benefit in using a BB with a Bridgeport class machine, but maybe for a bench-top class machine, where space saving might be a concern. It would be nice to come up with some design goals and maybe get a set of boards made? > > >> >> Also it will be nice to have a small touch screen to be used with axis , >> some advicez . I am thinking as variant to use a android tablet with an >> x11 server app >> >> Paul ... snip My plan is to find a cheap 15 or 19" touch screen from eBay. For a bench-top machine, the screen would likely be mounted above or up off the bench, so space is less of a concern, and as far as screen size goes, too much might be enough. So far, VNC is way too slow for machine control, but may be fine for monitoring, therefore, the monitor should interface as directly as possible with the BB. I'm not sure how many cheap touch screens have HDMI. The BB seems to have a serial port, I'm not sure it can be used for the touch interface. It might be useful to incorporate a powered USB hub on the interface board? -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
