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Alternative to recirculating ballscrews.

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NeoTech:
These uses a "normal" pitched thread instead of a acme thread. And makes use of smaller rollers that mates with the main axle thread.
They are driven by small gears on the ends of the rollers and indexes by that means. Im guessing the gearing ratio must be similar to a planetary calculation for correct turning of the rollers against the thread on the leadscrew.. Anyways..These are actually manageable to make on your own rather than the ballscrews that is a damn hassle (have tried).
See video below.



EDIT:
And well i found an old clip in my saved files that i think will add to this little idea nicely; this is the homemade version i guess. =)
[ Invalid YouTube link ]

awemawson:
Nothing showing for me in the pictures - just a blank space

andyf:
The videos show up fine for me.

Andy

AdeV:
Is it actually a non-backlash system, or just a way of gearing down a leadscrew?

Andrew - the "pictures" are youtube links, codes oMd7Lqian48 and iPkoGug-oC0 for top & bottom ones respectively.

NeoTech:
Its actually a linear leadscrew, its a replacement for ballscrews according to SKFs homepage. It can do both finer resolutions and more coarse resolution then an ordinary acme screw. And it can do it on a normal metric pitch thread..

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