On Tuesday 16 June 2015 05:29:37 andy pugh wrote: > On 16 June 2015 at 00:44, Gene Heskett <[email protected]> wrote: > >> The spindle speed is likely to be too slow for any work that you > >> (or I) can lift. > > > > Good point, I can't begin to lift the chuck itself. My back is too > > far gone. > > To expand on that, my 1930s Colchester Triumph has spindle speeds (if > I recall correctly) from 14 to 320 rpm. An older lather (pre > high-speed-steel) might well be even slower.
I have no clue what the speeds were/are on this elderly Porter. From the looks of whats left of the drive, (the motor is missing) I'd be surprised if it could make 400 rpm. Flat belt for the final drive, about 4" wide. Assuming a 10 horse 1750 motor with a 3.5-4" triple sheeve pulley on the motor, the reduction there is spinning a 14" triple, which in turn is spinning the stepped drive for the flat belt. A lot of arm extracting monkey motion for the unlucky operator to tangle with if he thinks he can flip the belt to the next speed without stopping. And quite likely a handy bar of belt dressing for traction. But running it with LinuxCNC, now that would be a treat. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
