On 7 November 2011 04:32, Kent A. Reed <knbr...@erols.com> wrote: > Once you've settled on an approach I hope you'll provide pictures for > the rest of us to ooh and aah over :-)
I have been thinking about this, and settled down to design a purely mechanical High-Speed spindle for my milling machine. It has a BT30 spindle and, like many oldr machines, a range of speeds, all of which are slow. In this case the are speeds from 46 to 1200 rpm. http://www.bodgesoc.org/HS_Spindle.html It looks a bit of a mess in HTML, but if you download the PDFs and view them in Adobe Reader they look a lot better, and you can pan/tilt/rotate, change to wireframe etc. It is based on a supercharger I saw at work some time ago. It is purely friction-drive (for smoothness, and cheapness). The outer (green) spring-band is a very tight fit and clamps the (off the shelf) 6204 bearings hard against the ER11 collet chuck 8mm shaft ($10 from eBay CTS Tools). The outer band needs to be held stationary by some peg/bracket/arm which is not shown. Also not shown is the nose-seal holder (which also tensions the bearings and depends on the exact design of the collet chuck and how the collet chuck is located in the nose bearings (no idea, possibly a split-clamp and jack-screws, maybe just a loctite-ed collar) The design shown has a 104:8 ratio, so for a 1000rpm input speed the output would be 13,000 rpm. -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
