OK, so I found this on thingiverse and made a little testprint myself.Basically you take at least three ball-bearings and group them around a plain steel rod - but skewed.That skew will generate a linear motion when the rod is turned.Pros of this approach are:+ Almost no backlash.+ Use stuff that yo...By: brainzilla
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from Instructables: exploring - technology - robots http://ift.tt/1ChWapU
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