Gene I use an "angle dekkor" when at the last job using the dividing plates I made some bad gears, So some diagnosis was done.
Simple method was use a digital vernier over an arbitary number of teeth set zero rinse repeat around the gear setting 0 whenever it was -ve after another lap you will see a peak error, this can also be done to a dividing plate. this showed some serious error at the time. The angle dekkor is an auto collimator for measuring angles see http://en.wikiversity.org/wiki/Auto_collimator we tested all our dividing heads and they turned out to be mainly very bad nearly a degree out, most of the error was cyclic and could be shown to be the worm coming into engagement once per rev of the worm, we got a sawtooth error we only had one dividing head that worked to any sort of spec and we used it to create a new dividing plate with standard numbers for clock gears. I have done the simple test on a high count gear made on a Taiwan rotary it was passable. Once per worm wheel cyclic error is less important for clock gears and was not investigated at the time. Dave Caroline ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
