So there is more than one way of making a ballnut, again I learn something new :whistling:
I am struggling to see how the "Deflector Type" recirculates balls. From the diagram it looks like it happens in the middle of the nut, surely the return path should be at the ends of the nut? If that was the case then what is the difference between this and the return pipe version? :confused:
The preload options seem pretty simple, push the two nuts apart slightly or pull them together slightly or mess with the thread pitch. Surely messing with the thread pitch will lead to a shorter service life? When would each of the three pre-load methods be of benefit or inappropriate and why?
You can use Belleville washers to pre-load two single nuts to make a preloaded nut, but bear in mind if the force on the nut exceeds the pre-load you will get backlash.
In theory the error in the thread pitch of a low grade ballscrew C7 will cause different loading as the nut travels especially when it's a double nut that just uses a spacer. In practice for a DIY machine is this significant? Probably not.
Here's one way to do it:
You'll find plenty of long discussions on CNCzone and this forum about the relative merits of each type.
By cambesol in forum Metalwork DiscussionReplies: 11Last Post: 10-12-2013, 09:26 AM
NEW MEMBER: Newbie - question on bit typesBy Steven W in forum New Member IntroductionsReplies: 2Last Post: 16-05-2013, 11:06 AM
By BedlamRik in forum Resources & HelpReplies: 5Last Post: 05-01-2013, 12:05 AM
By Richie in forum Wood Finishing Tips & TricksReplies: 15Last Post: 14-06-2012, 04:09 PM
By range3rrr in forum Rails, Guideways & BearingsReplies: 1Last Post: 24-08-2011, 10:44 PM