Yes. Feedback from the motor shafts only. This is the #1 most common way to go. You might be thinking about a lot of backlash but they likely have ball screws not acme lead screws.
Ball screws have gotten cheap enough now that I'm putting one on a $500 Harbor Freight mill. I paid abut $30 for a very good 16mm diameter by 500mm long zero backlash ball screw and nut. Yes truly "zero" there seem to be two ball nuts working in opposition. If there is backlash on the $30 screw it is less them by dial indicator can show. On Sat, May 19, 2018 at 6:58 PM, Dan Bloomquist <[email protected]> wrote: > > My son is looking at CNC mills. I cam across this one, and no, I don't > think it suitable for him. He will really need a Haas class machine. > > But I'm looking at the photos and I don't see any 'glass', feedback, like > my mill. How does it work? I know those have to be servos, not steppers. Do > they just encode on the drive shaft and consider that accurate enough? > > <https://www.ebay.com/itm/LAGUN-FTV-1-VERTICAL-CNC-KNEE-MILL > -w-BANDIT-Control-42-x9-Table-Tool-Holders/173275239732> > > Thanks, Dan. > > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
