On Friday 07 November 2014 07:24:43 andy pugh did opine And Gene did reply: > On 7 November 2014 11:55, Marshland Engineering > > <[email protected]> wrote: > > so 10-20 watts would be enough. Why does my Anilam lathe and SWI mill > > use 2 kw motors ? > > It is probably to get the steady-state constant torque rating required > for the cutting forces. > > Lets consider a cut with the max cutter that the spec says (32mm) > making a 6mm deep slot. > http://zero-divide.net/?page=fswizard calculates cutting forces.
Nice link Andy, Thanks, bookmarked FFR. > That suggests 450 rpm, 172mm/min feed and 1800N cutting force. > That is still only 5W of power required, but the ball-screw torque is > now 9.0 Nm (1300 oz-in) and suddenly your motors look undersized. > (you should be able to make the cut at 3mm DOC and a slower feed, > though) Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
