Yup, I agree! if the keys were tight enough to get a few tenths alignment from end to end on the vise jaw, it would be hard to put the key into the slot. Also, my understanding of the way the slots are made in at least some machines is the slots are milled first, then the dovetails are cut (or scraped-in on a high-end machine.) So, the slots are not guaranteed to be parallel to the table travel. They will be close, but not perfectly parallel.
Jon this is why i like subplates, they are machined flat on the machine and the grid is machined on the machine , highly repeatable and straght . http://www.practicalmachinist.com/vb/cnc-machining/aluminum-subplate-finished-180075/ then align vise drill 2 dowel holes and vise is " hot swappable " to .001 every time jeremy youngs On Mon, Jul 21, 2014 at 1:23 PM, Jon Elson <el...@pico-systems.com> wrote: > On 07/21/2014 11:44 AM, Stuart Stevenson wrote: > > Gentlemen, > > my experience dictates > > "DO NOT TRUST KEYS TO ALIGN VISES AND HOLDING FIXTURES!!!!!!!" > > always verify the alignment with appropriate precision devices > > > Yup, I agree! if the keys were tight enough to get a few tenths > alignment from end to end on the vise jaw, it would be hard to > put the key into the slot. Also, my understanding of the > way the > slots are made in at least some machines is the slots are > milled first, then the dovetails are cut (or scraped-in on > a high-end machine.) So, the slots are not guaranteed to > be parallel to the table travel. They will be close, but not > perfectly parallel. > > Jon > > > ------------------------------------------------------------------------------ > Want fast and easy access to all the code in your enterprise? Index and > search up to 200,000 lines of code with a free copy of Black Duck > Code Sight - the same software that powers the world's largest code > search on Ohloh, the Black Duck Open Hub! Try it now. > http://p.sf.net/sfu/bds > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
