2009/12/10 Pat Lyons <[email protected]>: > any comments/suggestions/do's&donts???
I have converted one of these: http://www.axminster.co.uk/product.asp?pf_id=453684&name=table&user_search=1&sfile=1&jump=44 It took me too iterations. Initially I just made a motor mount and retained the existing bearing arrangements on the worm shaft. This turned out not to work very well at all as the plain bearings were inconsistent and not very smooth (partly due to not being very straight) with a rather poor end-thrust arrangment. . Iteration 2 involved making a complete new eccentric shaft with a pair of back-to-back angular contact bearings outside the main body and a needle roller inside the body adjacent to the worm. I modified the worm shaft to suit the needle roller and can't remember what I did at the other end. Outboard of the angular contact bearings there is a spider coupling, then a circular register for the stepper. Round the outside of this register there is a square plate, split, with a clamp screw. This has bolt holes for the NEMA23 stepper, and the split/clamp arrangement allows the motor to be rotated to suit the rotation of the eccentic mesh adjustment. I have a hand-drawn dimensioned drawing of the whole bearing and shaft arrangement I could digitise if you think it would be any help. -- atp ------------------------------------------------------------------------------ Return on Information: Google Enterprise Search pays you back Get the facts. http://p.sf.net/sfu/google-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
