On 12/17/2013 09:37 PM, John Alexander Stewart wrote: > The Compact-8 does have a 40 tooth gear on the spindle. Right now spindle > pulley is off, because was doing some measurements on it for someone in > Britain who specializes in threading clutches - he needed a Compact-8 to > measure. > > Was thinking that, while it was off, I could make up a large disk with > holes for the encoder. Would it be better to read off the 40 tooth gear on > the spindle?? To me, in my novice state, I'd think that was not as good, > but... > > If the gear is steel, you could use the trick I used: http://pico-systems.com/bridge_spindle.html
The gear teeth on the Bridgeport are probably larger than on your lathe, but those Avago sensors detect the PASSAGE of the tooth across the face of the sensor, and are supposed to be able to detect fairly small teeth. You need 3 sensors, but together they cost less than a most encoders. A 40-tooth gear would give you 160 counts/rev, which should be fine for threading. I do fine on my Bridgeport with 324 counts/rev. Jon ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
