On Thu, Jun 2, 2016, at 03:16 PM, Gene Heskett wrote: > On Thursday 02 June 2016 09:15:35 John Kasunich wrote: > > It sounds like part of the problem is a spindle pulley that > > is too small. That hurts twice. First, it reduces the lever > > arm and requires more belt pull per ft-lb of torque delivered. > > Second, it reduces the belt wrap and number of teeth engaged, > > which increases the load per tooth even more. > > > > Bigger pulleys help in other ways too. A big spindle pulley > > provides some flywheel effect which can reduce chatter > > and relieves the motor/belt of the worst shock loads. > > A larger upper pulley that drives the lathes head countershaft is not > possible as it runs into the rear of the spindle at about 1 more cog. >
When I wrote that I was unaware that this lathe had gears inside the headstock and that the belt was driving the shaft with the gears rather than driving the spindle directly. I think your "bigger better lathe" approach is the right one. But if for some reason I was stuck with the 7x lathe, I would ignore the countershaft with its plastic gears and put a nice big pulley on the back of the main spindle.... -- John Kasunich jmkasun...@fastmail.fm ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
