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  1. 26-07-2012 #10
    Jonathan's Avatar
    Lives in Leicester (Home) or Nottingham University (2nd Home), United Kingdom.
    Jonathan
    Last Activity: 05-04-2020 Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 3,571. Received thanks 325 times, giving thanks to others 8 times. Referred 1 members to the community.
    Quote Originally Posted by D-man View Post
    Hi Jonathan, any chance you could knock 2 of these units up for me?

    Im running the 2020 ballscrew and need someway of using a screw of 3000mm length without whipping and this looks ideal
    Yes I can, depending on how soon you need them.

    A rotating ballnut would be ideal with the a 2020, 3000mm long screw. Since (I gather) this is a woodworking machine, you would probably want to gear it 2:1 so the gantry moves 10mm for every motor revolution.

    Here's one I made recently, version 3 I suppose. The significant change is using sealed angular contact bearings (turns out they do exist) and threading the shaft to enable a pair of locknuts to pre-load the bearings.

    Click image for larger version.  Name: DSC09693 (Large).JPG  Views: 2302  Size: 205.8 KB  ID: 6831Click image for larger version.  Name: DSC09679 (Medium).JPG  Views: 2773  Size: 119.3 KB  ID: 6828Click image for larger version.  Name: DSC09691 (Large).JPG  Views: 5236  Size: 177.3 KB  ID: 6830Click image for larger version.  Name: DSC09683 (Medium).JPG  Views: 2397  Size: 123.2 KB  ID: 6829

    Will post a video when I have time.
    Last edited by Jonathan; 12-09-2012 at 02:43 PM. Reason: Attachments never appeared
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.
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