On Thu, 11 Jun 2009 07:25:33 -0400, you wrote: >> >> Ooohh look! - somebody with experience who's actually been there and >> done it too <G> >Hahahaha >> >> I've give up arguing with pedantic theorists, they always know better, >> I'll just get back to doing it too at about +/-0.001 ;) > >Wow Steve... that's impressive.
Nahh - it's only inches <G> But, as it's mainly cutting ply, laminate and the odd Al sheet it's plenty good enough. 2 x 30mm wide belt, very high tension. A word of warning - The belt tension is often more than the rest of the bearings/mounts can stand so be careful there. Don't ask how I know that.. That particular machine is a customers, it started life as an expensive, but poor Chinese router table that spent more time broken than working! I welded lots of box section steel to it to beef it up, fitted new rails and the much bigger belt drive system, they are very happy with it now, it works ;) I've two more to do for other companies, problem is they can only be done when they are on shutdown for holidays. One way to get good results with belts is to strobe them at full speed and watch the first tooth engaged by the pulley. If the tooth is trying to climb out, it's too slack. That fault often shows after a time as a line of wear on the pulley teeth near the crest, but it's a bit late then. > >We thought about a way to get rid of that last flex and thought about >some mechanism which measures the tension dynamically and tweaks an >idler pulley accordingly. I put idlers on that one initially - caused bizarre resonance problems at different speeds, best without if you can get the tension high enough. Steve Blackmore -- ------------------------------------------------------------------------------ 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
