On Thursday 10 December 2009, Rainer Schmidt wrote: >You can start out with the cheapest table you can find because you can >take the motor and probably the mount to another level later when you >mill the el cheapo into the ground. Backlash is not a problem as long >as you have control over your toolpath. I build a 4th out of 2 inch >thick al using a 1.5 ready made rod form McMasters and timkin >bearings. I used a belt to drive it. I chose the rod because it had >the right thread for the chuck I used. The chuck at the front and the >pulley on the back together with a tiny stamped out shim stock disk >provide the pressure to keep the assembly in the timkin bearings. Rock >solid, no backlash, and good to swing an ox over the BBQ pit if need >be 8))). >Here's a picture. I bolted the drive right onto the 4th as the amount >of AL is perfect for a heat sink haha. All self contained now. The >tail stock has a MT3... just for size info. It's HUGE. > >http://www.machsupport.com/forum/index.php/topic,11044.0.html
Sweet! The alu blocks remind me of my Z drive, but I'm turning the nuts on a piece of 1/2 acme bolted solidly into the head's sled casting. Not rollers either, but ball cartridges designed for half a ton of axially aligned thrust. Semi sealed, the grease fittings are aligned with the small hole in the outer dust cover. But I figure I'll fall over before they need grease again. :-) >Fudged turn table, fudged indexer, self build, all will work. Just do >not expect to get great turn ratios with the machine shop based turn >tables. My Self build one with the belt and stepper can run at least >400 rpm. Nice for many very shallow passes. I stabilized burl and am >'turning' that with the spindle and high 4th rpm's rather quickly. No >way to do that by hand. > >best of luck! >Rainer > >--------------------------------------------------------------------------- >--- Return on Information: >Google Enterprise Search pays you back >Get the facts. >http://p.sf.net/sfu/google-dev2dev >_______________________________________________ >Emc-users mailing list >[email protected] >https://lists.sourceforge.net/lists/listinfo/emc-users > -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) The NRA is offering FREE Associate memberships to anyone who wants them. <https://www.nrahq.org/nrabonus/accept-membership.asp> No matter who you are, some scholar can show you the great idea you had was had by someone before you. ------------------------------------------------------------------------------ Return on Information: Google Enterprise Search pays you back Get the facts. http://p.sf.net/sfu/google-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
