On Wed, Sep 8, 2010 at 8:18 PM, Jon Elson <el...@pico-systems.com> wrote: > Igor Chudov wrote: >> >> I think that the heavy knee will always sit tight on the acme screw. >> >> Other backlash may be at least repeatable. I will see. I am not >> totally averse to just putting an encoder on the knee handle shaft. >> > Depending on how tight the ways are, it may be possible for the knee to rock > on the ways, as the elevating screw is about a foot in front of the > ways. I know my > Bridgeport does rock, but it has worn dovetail ways on it. Also, it > can't be totally > trusted to settle on the screw, even with no counterbalance system. If you > put the encoder on the outer shaft, then you will definitely have to always > make the last adjustment in the same direction, but that is pretty easy > to do.
Jon, I will try to quantify the inaccuracy if I go ahead with it. However, I decided today to just finish my 3D conversion (finish the remaining buttons and wire a probe) and stop here for a while, as I need to work on algebra.com. i ------------------------------------------------------------------------------ This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. Enter the Intel(R) Threading Challenge 2010. http://p.sf.net/sfu/intel-thread-sfd _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
