On 08.05.14 17:35, Gene Heskett wrote: > FWIW, the Union Tool Co. level says the bed angle, high in front because > the v-way is sticking up, is sitting at 175.5 degrees on both ends of the > bed, so if it is warped, its not enough that I can actually measure. I > thought it had a vernier scale, but I guess not.
If resolution is 0.5°, then that'd pick up a 50 thou twist on a 5" wide bed. If 0.01°, then 10 thou is detectable. With a 0.02mm/m machine level, one division is 0.00115°, and it's big enough to visually divide by two or three. But even a full division is 1/10 thou across 5", if I'm counting right. (You just have to wait a good half a minute for the bubble to settle, for full accuracy.) My lathe also has the v-way sticking up at the front, so I bought a new 1/2" square HSS lathe tool blank, to use as a nicely ground spacer on the flat rear shear. (But then just plonked the level on the flat-topped cross-slide, since that's what must travel level, anyhow.) Erik -- Rising levels of CO2 around the world will significantly impact the nutrient content of crops according to a new study. Experiments show levels of zinc, iron and protein are likely to be reduced by up to 10% in wheat and rice by 2050. - http://www.bbc.com/news/science-environment-27308720 ------------------------------------------------------------------------------ Is your legacy SCM system holding you back? Join Perforce May 7 to find out: • 3 signs your SCM is hindering your productivity • Requirements for releasing software faster • Expert tips and advice for migrating your SCM now http://p.sf.net/sfu/perforce _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
