On Saturday 11 August 2012 11:25:03 jeremy youngs did opine: > http://www.moglice.com/ > > has anybody got experience wit this stuff? im thinking about lining my > lead nuts with it as ti seems less involved (read expensive) than > ballscrews and would help to eliminate the .006 backlash thats > destroying my nice circles. just wondering > jeremy youngs
I think that is likely an excellent question Jeremy. I have read some pretty glowing reports about it when used to clean up and restore worn ways. The lead screw nuts however are subject to 100x the applied psi's the ways are. If it wears off rapidly, then you are no worse off than before, so its at least worth the try. Be aware that since you'll be using the screw as the molding shaper, both it and the nut will have to be 'lox clean' and the screw well anointed with a release agent, like hard Carnaba wax applied to the screw while hot enough to wet the screw surface completely, then polished with a dry microfiber cloth. If it gets welded, heat in the range of 350-400F should loosen it. You'll have to start all over in that event I expect. My micromill's nuts are crap too, but I've been considering a double nut with some sort of a wear adjustment scheme. That is what I did when I rebuilt the Z on my mill, the two Nook nuts are 16 tpi, on a 10 tpi acme screw, and backlash there once worn in, is about a thou for long periods of time. A very small adjustment of the upper nut serves to control that reasonably well. My biggest Z problem right now is the ways are wearing out and stiction is becoming a thump thump, about 2 thou a thump if it moves too slow. Severely aggravated by the way too short length of the ways of the head casting, needs at least 2" more length engaged with that puny post, it rocks up and down and can actually wedge lock. The HF micro-mill thing is a pigs ear from the beginning. I have another of that casting, and have considered ordering a 45 degree dovetail bit, making a longer sled, sawing the ways off that casting and furnace brazing the new slider to it. But doing that square & precise a brazing job scares me. Perhaps I should order the pieces for the tilting post, and use them to make a tilting head, which could be at least as handy as bottled beer or sliced bread. 3 to 5 seems to be about as tight as I can keep the xy screws, but with matching backlash settings in the .ini file, I have cut bearing seats that fit quite nicely. The only reason I haven't hauled a GO704 home from Grizzly is that until my most recent stop there last week, they never had one on display. Now they do, and that much bigger table now has rust spots on it from my drooling on it. Same for the 11x26 lathe, but I don't think my toy Rav4 has the backbone to haul that 800 lbs home. It weighs 6, but needs another 100 pounds worth of tools & the base is about another 100, dropping the card for around $2500 by the time I actually could make swarf with it. Sigh, so many toys, so little time left to enjoy them, not to mention cash and room... Or cash to make more room, something like that anyway. ;-) 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) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! Oreo. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
