On Wed, 2 Feb 2011 21:22:26 +1100, you wrote: >Ah, that's just what I was puzzling over. How to remove the end-float in >a way that works, yet isn't horribly complicated. I figured that the >axial space in the eccentric housing has to either be a tight fit on the >length of the worm plus thrust bearings, or summat that's adjustable or >inherently provides sufficient preload to avoid backlash has to be >squeezed in there as well.
>Is it a Belville washer which provides (known) preload? Hi Erik I don't use any belville washers, I thread the handle end the shaft. A nut and washer takes up the endfloat slack against the bearings and I thread the inside of one half of an Oldham coupling to match. That then screws on and locks the assembly. >I'll disassemble the table. I had considered just replacing the >handwheel with a HTD pulley, and mounting the motor on a bracket held in >a T-slot, as recommended on an old thread, but that loses appeal, the >more I think about actually doing it. Have a look at Tony Jeffree's old divisionmaster page. http://divisionmaster.co.uk/examples.html That's the way I fasten steppers to rotary tables. The tubular mount has a slot in it so you can get at the screws on the Oldham coupling. Tony also used the same style mounts for converting an X3 Have a look here http://www.jeffree.co.uk/pages/x3-to-cnc.html The first photo shows a threaded oldham coupling used as a nut. Steve Blackmore -- ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
