2012/7/21 Erik Christiansen <dva...@internode.on.net>: > > In any event, I'd fix a long slender ballscrew, to avoid whipping, and > rotate the nut.
I did this on the last machine I built with this exact intention in my mind. The overall result - failure. I seriously doubt I will ever do that again. Longest screw was 2800 mm long (other 2 were 1800 mm long), all of them - 16 mm diameter, 10 mm pitch. My main conclusion - the nut housing requires pretty precise machining to match the central axis of the nut itself with the axis around which that nut rotates in bearings. I had some deviations there, so the rotation of the nut caused the screw to vibrate, so the max speed ended up to be 5x smaller than initially planned just to avoid excessive vibrations. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
