Greetings, So I just got a response from my ballscrew vendor. They can supply a 40mm diameter with 40mm pitch (3048 mm long) for a reasonable cost. Less than $1k including shipping and machining.
Looks like that could safely rotate at 977 RPM which would move the ballnut at 1538 IPM (with both ends supported with double bearings spaced apart). Even though it will cost me additional money, it may cost less (not to mention significant time/experimentation/etc) compared to machining the required hardware to drive the ballnut with my current ballscrews. Also, seems like rotating the ballscrew can be problematic - I read at sufficient RPM's the lubrication can driven away from the ballscew from centrifugal force. I was planning on having a ballscrew for each rail, but if I go this route I think I will only have a single ballscrew in the middle of both rails. The main reason (besides cost) is the significant inertia the ballscrew will have rotating at speed. Cheers, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated <http://3DTOPO.com> Phone: 208.462.4171 ------------------------------------------------------------------------------ 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
