On Fri, Jun 21, 2013 at 10:02 PM, Tomaz T. <[email protected]> wrote: > I'm thinking about converting my jet jmd-18 mill/drill with round column, but > thing that worries me the most right from the start is, if Z axis would be > accurate enough. > > There is one solution by reversing quill spring so it is forcing axis all the > time downwards and this way you get rid of backlash on worm gear, next thing > is how solve problem with quill lock, which is meant to be used when quill is > in desired position (height) so you lock it to increase stiffness (and > accuracy) on Z axis. > So did anyone here did any similar conversion and have a solution or > suggestion for this?
I had a round column machine many years ago, I am glad I sold it I would say a machine like that is unsuited to cnc conversion because of the column and its need to be clamped They do make good bench drills though. There is a reason the spring pulls up, so the backlash is removed and is held against the worm. Dave Caroline > > here is machine's pic: > http://www.rustan.ru/sites/default/files/JMD-18F.jpg > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Windows: > > Build for Windows Store. > > http://p.sf.net/sfu/windows-dev2dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
