diameter rollers have been supplanted by triameter rollers and quadrant rollers since the edition of the wikipedia article.
--- On Tue, 5/15/12, Jan de Kruyf <[email protected]> wrote: > From: Jan de Kruyf <[email protected]> > Subject: Re: [Emc-users] OT: Help with Harmonic wave reducer drives needed > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Date: Tuesday, May 15, 2012, 11:45 PM > are you on about this thing > Viesturs? > > http://en.wikipedia.org/wiki/Harmonic_drive > > j. > > > On Sat, May 12, 2012 at 4:27 PM, Viesturs Lācis > <[email protected]>wrote: > > > Hello, gentlemen! > > > > I would like to ask, if someone can point me to some > source of > > information, how to design and calculate wave > reducers. > > > > I am doing this for my school project. I have a book, > which has all > > the formulas etc, but I am stuck with three errors > already and I do > > not have any other source of this information to > verify, if the error > > is in my brain or in the book. > > > > Few examples: > > 1) there is formula for involute function of pressure > angle between > > gear hob and the gear (that is needed to calculate > correction for > > flexible gear). One of the elements in that formula is > correction > > ratio x_2; > > The formula for calculating x_2 is given as well. And > guess what, one > > of elements in that formula is the involute function of > pressure angle > > between gear hob and the gear. > > So there is magic circle, 2 unknown values depending > each on other. > > But I managed to solve that. > > 2) there is some mysterious ratio in 2 formulas for > wave generator > > profle parameters and correction ratio for internal > gear without any > > explanation, what is it and how it is calculated. > > 3) the formula for efficiency ratio is doomed already > before starting > > to calculate it: n=1/(1+a+2,2*10^5*u) > > a - not explained, what is that, but it is given that > for flexible > > bearing a=0,14 > > u - reduction ratio, u = 89 > > It does not really matters, because 2,2*10^5 means that > the efficiency > > is virtually non-existent. > > 4) Wave generator is elipse, expected ovality (d1 - > d2)/2 should be > > around value of modulus of teeth, which in my case is > 0,7, but I am > > getting 0,17, which just means that the gears will > remain engaged all > > around their perimeters, which is failure. > > > > I have been trying to find something in the > international databases we > > have available through school's library IT tools, but > no luck. > > Googling just gives me total rubbish. Obviously I fail > at choosing > > correct keywords. > > > > Can You point me to some place, where I could find, how > to design and > > calculate wave reducer? All the flexible gears, > flexible bearings etc. > > > > Thanks! > > > > 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 > > [email protected] > > 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 > [email protected] > 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
