On 7 August 2018 at 16:12, Ed <[email protected]> wrote: > On 08/07/2018 08:40 AM, andy pugh wrote: > >> >> Either of these approaches will lead to a jaw that is a perfect fit in >> exactly one position and will bind in any other position. >> >> The outer flanks want to be machined to be at least as small a radius >> as the smallest part of the scroll that they can touch. >> The inner flanks want to be the same radius as the absolute max of the >> scroll radius. >> >> I doubt that they are typically cut with any "slope" across the face. >> They can only ever half line-contact with the scroll. >> >> Andy has it right with the radius question. Make a program to those > radiuses and offset one 1/3 of the lead and one 2/3 of the lead of the > scroll. > <https://lists.sourceforge.net/lists/listinfo/emc-users> >
If you draw the spiral in cad, then choose a section of maximum radius, and minimum radius that a jaw 'tooth' will traverse. Now superimpose those two profiles and lop off any excess, keeping only the intersecting area. Repeat for all jaw 'teeth' Then hand code the segments.. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
