primitive clock gears were cut from wood by hand, and early lenses were figured from glass in a similar way. i dont know if it would work in this case, but i read about making precise worm gears for telescope mounts starting with a more or less rough notching of the gear followed by a 'running in' of the mating surfaces with abrasive fluid until the final form was achieved. apparently this is also a way to lap a screw and a long split nut into a zero backlash form.
--- On Sun, 5/13/12, Viesturs Lācis <viesturs.la...@gmail.com> wrote: > From: Viesturs Lācis <viesturs.la...@gmail.com> > Subject: Re: [Emc-users] Some advice needed > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Date: Sunday, May 13, 2012, 5:02 AM > 2012/5/13 andy pugh <bodge...@gmail.com>: > > On 13 May 2012 12:04, charles green <xxzzb...@yahoo.com> > wrote: > >> wire electric discharge cutting? > > > > I was thinking that might be the easiest approach for > low volume. > > > > How many of these do you need to make? And what is the > budget? > > Don't know, maybe 2 or 3. Just to try out, if something like > that can > be built and how would such a wave reducer work. > Budget? The less the better :) > Cutting itself - some 20-30 EUR (M0,5 gear with 246 teeth). > > The problem would be obtaining the the path, because > correction has to > be applied - I can calculate the distance between center of > the gear > and center of the tool, but I have no idea, how to obtain > those > involute splines that make the shape of the teeth. > > > As far as I know the only way to make internal gears is > by "shaving" > > http://youtu.be/_j6KQ96YZM0 > > Yes, that is the exact process! > There is a special machine for this at school, I just need > the tool. > That is what I was asking for in my first post and actually > that is > what I still would like to find out - where could I get that > shaving > tool for M0,5 gears? > > > It is certainly a process which lends itself to CNC > control > > Not necessarily, if You have special gear cutting machine > available :) > > > However, the cutters are probably not off-the-shelf > items. > > I would say that they are. As long as the modulus is > standard value > and the pressure angle is standard (which they are for my > case). > Cutter for module 0,63 gear would be something crazy, but > module 0,5 > is fairly standard. > > Viesturs > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's > security and > threat landscape has changed and how IT managers can > respond. Discussions > will include endpoint security, mobile security and the > latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
