On 17 July 2018 at 14:25, Gene Heskett <[email protected]> wrote: > 'twouldn't work on my machine. Incapable of loosening any collet/nut > combo I own in 1/4 turn. 2 turns maybe, and in any event could only > tighten a collet to about 5% of the torque it needs to adequately hold a > tool.
That depends purely on the diameter of the disc and the axis force. It uses the axis move to crack the collet free, then spins the spindle to loosen further. And there is no reason that the rotary move couldn't be more than a quarter turn. ER20 wants 80 Nm. If the disc is 100mm radius then it needs an axis force of 800N, or 80kg. If the ballscrew on the axis is 5mm pitch then that implies a motor torque of 0.6Nm. So even a relatively small stepper can do it. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 ------------------------------------------------------------------------------ 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
