On Tuesday, May 15, 2012 07:38:31 AM andy pugh did opine: > On 15 May 2012 10:42, charles green <xxzzb...@yahoo.com> wrote: > > the discreet spline teeth are also an approximation. in fact, > > anything made out of atoms is flexible and grainy. why not construct > > mechanisms from massless rigid rods and such? > > I think Viesturs has a point about the sides being unconstrained in a > twin-roller arrangement. The sides have the option of flapping like a > drive belt. > A combination roller/plain bearing might work, though, imagine a brass > oval with rollers in the ends. There would be little load on the > plain-bearing portions, but it would constrain the flex-spline.
I think that would work at elevated speeds only with sufficient liquid flow into the clearance to maintain hydrodynamic cushioning. Metal to metal contact would likely hammer the brass out of shape, possibly contaminating the interior with particulates before they were expected. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Revolution, n.: A form of government abroad. ------------------------------------------------------------------------------ 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
