On Wednesday 20 March 2013 10:48:48 andy pugh did opine: > On 20 March 2013 13:34, Gene Heskett <[email protected]> wrote: > >> However, F will not be the normal feedrate for a linear move, it > >> needs to be modified by a factor of pi * D * TPI to give the right > >> feedrate. > > > > Humm, Early here Andy. Since it is the R that determines surface speed > > This isn't about the surface speed, that is set by the spindle speed. > This is how much longer the actual cut is than the simple linear move > in X.
So it would be something like #<_F_speed>= [10 / [pi * d * tpi]] Adjust the 10 to arrive at something ones table can actually do. Mine is not a speed daemon by any means, 1800 degrees/min & that needs a few shots of vactra through the brake screws hole to do that. I have a 262 oz motor on it, but it needs more because I've pulled it down pretty snug to try & control its backlash. Cheap 4" grizzly table, both the bull gear and the worm are somewhat eccentric. That have a better one of course and I should bite the SS check and get it. I /knew/ I wasn't looking at it correctly, thanks Andy. Coffee under construction. :) Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> "We don't have to protect the environment -- the Second Coming is at hand." -- James Watt I was taught to respect my elders, but its getting harder and harder to find any... ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_mar _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
