i did a few drawings of my concept (has anyone seen this done before?)


the first 2 show the ball nut and a mount i designed to utilize the original leadscrew mount holes
Click image for larger version.  Name: 9.JPG  Views: 1465  Size: 307.2 KB  ID: 7068Click image for larger version.  Name: 10.JPG  Views: 1443  Size: 293.2 KB  ID: 7069


i then proceeded to modify the old ballnut mount i designed into a ballscrew mount. notice how the new mounts are 0.01mm off concentric which i feel is negligible and with adjustment can be completely overcome
Click image for larger version.  Name: 11.JPG  Views: 1457  Size: 264.1 KB  ID: 7070Click image for larger version.  Name: 12.JPG  Views: 1434  Size: 264.4 KB  ID: 7071Click image for larger version.  Name: 13.JPG  Views: 1438  Size: 280.8 KB  ID: 7072

the screw mount was then further modified to allow attachment of a stepper via pulleys. it was also extended to clear the lip at the back of the knee (see second pic below)
Click image for larger version.  Name: 14.JPG  Views: 1427  Size: 296.4 KB  ID: 7073Click image for larger version.  Name: 15.JPG  Views: 1404  Size: 221.0 KB  ID: 7074

and finally with a nema 23 added for good measure
Click image for larger version.  Name: 16.JPG  Views: 1498  Size: 285.6 KB  ID: 7075

still have to draw some pulleys, a ballscrew and a few other components. more to come soon


so...

any critical thoughts on this design?