On 4/28/2012 3:34 PM, gene heskett wrote: > I tried one of mine, the stacked fender washers& rubber dampers on my z > yesterday, but its steel core to hold all the fender washers& rubber added > enough rotary mass I had to cut the accels in half on my Z to stop the > stalling, which wasn't exactly what I expected. So the rim heavy caster > wheel seems like the lessor of a rotary mass evil to me.
Errm. For the same mass, a short, large-diameter cylinder has a greater moment of inertia than a long, small-diameter one, since the moment depends on the *square* of the distance of the bits of mass from the axis. The rim-heavy caster wheel might turn out to be a considerably worse evil. Also, just to be clear, it is the ability of these dampers to dissipate mechanical energy at the excitation frequency that counts. Their raw inertia just provides a reaction wall for such tricks as viscous clamps and loose rattles to work against. Regards, Kent ------------------------------------------------------------------------------ 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
