I have a lathe with a moderately large spindle. I want to drive an encoder (well, actually, a resolver) at a 1:1 ratio from this.
The obvious way is with a 1:1 gear set, or a belt, but that does involve really quite a large gear on the weeny resolver shaft. I have been thinking about a 200:1 worm drive for an auxilairy resolver for absolute Z-axis positon feedback (I want to eliminate Z homing moves) and it occurred to me to wonder if a 1:1 ratio worm drive is possible, with the wheel much smaller than the worm. So, I modelled a 10-start worm and a 10-tooth wheel in CAD, and it wasn't long before I realised that I was designing something that I have seen before. A speedometer drive. http://www.ebay.co.uk/itm/251440255353 Now to find one with the right ratio and bore size. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Go from Idea to Many App Stores Faster with Intel(R) XDK Give your users amazing mobile app experiences with Intel(R) XDK. Use one codebase in this all-in-one HTML5 development environment. Design, debug & build mobile apps & 2D/3D high-impact games for multiple OSs. http://pubads.g.doubleclick.net/gampad/clk?id=254741911&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
