For rigid tapping you want full encoder plus index. Just to keep in mind. On Feb 17, 2013, at 2:12 PM, Pete Matos <[email protected]> wrote:
> DAVE, > The original setup was a tubular crush sleeve that used a pair of steel > collar with setscrews bearing against some steel cylindrical pins to crush > the thin walled tube down into the keyways in the screw and motor shaft. If > the new motors shafts were not larger than the existing ones I might try to > recreate that setup but with them being larger and also for the ease of > installation of the clamp type collars available now I will just upgrade. > I posted a possible set I saw on eBay from China yesterday but nobody had > any comments on it apparently.... I am leaning towards them but they do > not provide much information on them. Still looking for alternative > reasonably priced suggestions.... > > Jon, > Those sensors are similar to the hall effect ones I have considered for > it. I am actually looking for input more about the idea of using the single > aperture shutter wheel on the spindle with linuxcnc as to whether it works > well or not more than I am looking for sensor suggestions although that is > welcome too....peace > > > Pete > > > > On Sunday, February 17, 2013, dave <[email protected]> wrote: >> On Sun, 2013-02-17 at 10:46 -0600, Jon Elson wrote: >>> Pete Matos wrote: >>>> I think >>>> that may be overcomplicated and have been considering making a slot > wheel >>>> that would be attached to the spindle body itself and use some leading > edge >>>> timing with a photointerruptor or other sensor to locate toolchange >>>> position as well as track spindle speed for rigid tapping operations. >>> See http://pico-systems.com/bridge_spindle.html for how I added >>> a spindle encoder to a Bridgeport that had no provision for getting >>> at the spindle with a traditional encoder. I used the existing gear >>> on the spindle and added sensors to make it into a quadrature plus >>> index encoder. It works great for rigid tapping. >>> >>> Jon >>> >> Jon, >> I have acquired the sensors .... now all I have to find a round_to_it. >> I think that scheme will work both on my cinci contourmaster and tucked >> into the gearbox on the Mazak. :-) >> >> Pete, >> Just one question after all this really good discussion on your >> conversion. What did the original implementation use to couple the >> servos to the ballscrew? I must have missed that someplace along the >> way. >> >> Dave >>> > ---------------------------------------------------------------------------- -- >>> The Go Parallel Website, sponsored by Intel - in partnership with > Geeknet, >>> is your hub for all things parallel software development, from weekly > thought >>> leadership blogs to news, videos, case studies, tutorials, tech docs, >>> whitepapers, evaluation guides, and opinion stories. Check out the most >>> recent posts - join the conversation now. > http://goparallel.sourceforge.net/ >>> _______________________________________________ >>> Emc-users mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> >> >> > ---------------------------------------------------------------------------- -- >> The Go Parallel Website, sponsored by Intel - in partnership with Geeknet, >> is your hub for all things parallel software development, from weekly > thought >> leadership blogs to news, videos, case studies, tutorials, tech docs, >> whitepapers, evaluation guides, and opinion stories. Check out the most >> recent posts - join the conversation now. > http://goparallel.sourceforge.net/ >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > ---------------------------------------------------------------------------- -- > The Go Parallel Website, sponsored by Intel - in partnership with Geeknet, > is your hub for all things parallel software development, from weekly thought > leadership blogs to news, videos, case studies, tutorials, tech docs, > whitepapers, evaluation guides, and opinion stories. Check out the most > recent posts - join the conversation now. http://goparallel.sourceforge.net/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ The Go Parallel Website, sponsored by Intel - in partnership with Geeknet, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials, tech docs, whitepapers, evaluation guides, and opinion stories. Check out the most recent posts - join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
