Indeed it's not that critical, or at least if the tilting surface has a big radius where the vernier is placed is more than enough to set the angle.
In the pictures you can see our hobber working and you can see the vernier marked with red. http://s2.postimg.org/670ern5qh/IMG_20150223_WA0002.jpg http://s2.postimg.org/p0m7on3yh/IMG_20150223_WA0004.jpg 2015-08-01 1:47 GMT-03:00 Dave Caroline <dave.thearchiv...@gmail.com>: > "and feed the hob once every revolution of the work. " > That is geared as well it is a continuous function > > "For adjusting the twist, I was figuring on accurately placing two > drill bushings that would hold two dowel pins against which I would > place my sine bar, and just use a set of gage blocks to get the angle > right." > a rotary axis, > but this does not have to be as accurate as one first thinks, on my > hobbing machine and the one I used to use it is just lines marked on > the head and vernier lines on the body to clamp up the angle. On the > Mikron you could only estimate to about half a degree iirc. > On the Barber Colman, see the ball handle upper middle to the rear of the > head > > http://www.collection.archivist.info/archive/DJCPD/PD/2014/2014_09_17_Barber_Colman_cnc/IMG_1830.JPG > That has a vernier marked to allow estimation to 5 minutes. > > Dave Caroline > > > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- *Leonardo Marsaglia*. ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
