On Wed, 06 Nov 2013 15:43:17 -0500, you wrote: >A lot of that depends on your belt arrangement. They make linear >motion belting with a unique tooth profile. They use steel cords in >polyurethane belts to minimize stretch and they can obtain zero backlash >with that setup. To get more rigidity you can go with a wider belt but >then the price of the sprockets goes though the roof. When you get >that big, ball screw whipping becomes an issue if you want to use it for >plasma and need to move fast on thin sheetmetal. Plus they get very >expensive as you know..
Ballscrew whip isn't a problem if you use large diameter and pitch screws. I have a 2.5m one here off a laser cutter - 32mm diameter 10mm pitch. It's preloaded at both ends and has double anti backlash nuts. Never got round to building anything to fit it on and I certainly wouldn't like to buy one - I got it for nothing out of the scrap bin :) There's nothing wrong with it, the company change them every year whether they need it or not !! Unfortunately never been back when they just changed one again. Steve Blackmore -- ------------------------------------------------------------------------------ November Webinars for C, C++, Fortran Developers Accelerate application performance with scalable programming models. Explore techniques for threading, error checking, porting, and tuning. Get the most from the latest Intel processors and coprocessors. See abstracts and register http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
