On 01/23/2017 11:45 PM, Gene Heskett wrote: > Greetings all; > > I see some "Nema 24" motors at quite reasonable prices showing up on > fleabay,
SNIP > Now, I don't believe this is going to help with the resonance stalls I am > getting at about 30 ipm, so I'm thinking of building a viscous damper to > fit on the rear of this puppy. But unlike the ones on my hf micromill, > which are long steel spools carrying a 2+ inch stack of heavy fender > washers with elastomer sheets between the washers, which are true shock > absorbers as the resonance is killed by the frictional losses as the > washers walk on the talcum covered elastomer, but I don't have room for > a 2+" stack of fender washers in this spot. 5/8" axially at best. SNIP > Cheers, Gene Heskett RANT MODE ON Why in this day of cheap encoders, small ebay servo motors, and good inexpensive servo drives does any one even use stepper motors? Dampers, resonance issues, lost steps, stalls, only 30 IPM? Why? Gene, don't stay on the dark side! Go to servo's and don't look back, you will never regret it. RANT MODE OFF ----deflates----- Ed. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
