2009/6/8 Erik Christiansen <[email protected]>: > Their price for just an 80 tooth > anti-backlash wormwheel is lightyears beyond credibility.
Also, I am not sure how the anti-backlash works and can't find the link to the tech-spec that the page hints at that would tell me. It isn't clear if they are spring-loaded or preloaded. They might even use the arrangement I have seen on (I think) a motorcycle timing gear, where there are two gears clamped together with some friction between them with one having one more tooth than the other. However in that arrangement the sliding gear was a fair bit narrower and I think was only for quieting things at idle. Incidentally, my Mini-Lathe/Mill has the ballscrew at the back of the column linked to the head with a 25mm aluminium plate and it works semi-OK. I wouldn't do it the same way again, but will probably just stiffen up the arrangement with an angle-plate and live with it. This is just a hobby-machine though. Part of the reason I started with a (very) cheap chinese import was that if I had been modifying a proper machine tool like a Bridgeport/Colchester then I would have found it difficult to discard properly engineered parts and fit my stuff. No such worries with this machine. You can see the mechanism in this video. http://www.youtube.com/watch?v=95B8PDlnajk With the addition of a triangular plate I think it will be stiff enough, at the moment it isn't, really, but my cutting forces rarely exceed the weight of the head, so I get away with it. -- atp ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
