On 21 June 2013 23:02, 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? > > here is machine's pic: > http://www.rustan.ru/sites/default/files/JMD-18F.jpg > > ------------------------------------------------------------------------------ > > If you have the machine already, why not sell it and buy one of these; http://image.made-in-china.com/2f0j00CBHtvYeKhWoa/Drilling-and-Milling-Machine-ZAY7045FG-.jpg
For the difference of a square column, and an R8 spindle, I think it would be worth it. I have a mill like yours, and have examined it many times, but faced with a sloppy quill, a morse taper and a round column, means too much of a re-work to be worthwhile. Regards Roland ------------------------------------------------------------------------------ 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
