Re: KENT / AMERI SEIKI KMV 40 MAYR SMARTFLEX COUPLING x- axis ( table)
You mention ''excess'' wear. There should be no wear at all. If the coupling is slipping on either end, there should be some galling or grooving in the mating parts. I assume you have witness marks on either end of the coupling to confirm slipping. The other possibility could be an encoder issue.
Are you losing your X zero then the slip occurs? I use similar couplings on my lathe, and the only time I had a slip was during a crash. The X machine zero moved about 0.003'', but hasn't moved since.
For a test, why not write a quick program that rapids the X a few inches in either direction and run maybe 50 repetitions, check zero before and after. Also check the witness marks on the coupling.
If slip is occuring, then new bushings or new coupling might be in order. If the shaft is damaged, then maybe some bearing mount LocTite might be useful. https://www.mcmaster.com/loctite-retaining-compounds If used, buy the primer also. Not the best solution, but might solve the problem and keep you running.
Jim Dawson
Sandy, Oregon, USA