Linear actuator concept for CNC machines
by carlosgs, published
The main idea is that the threaded rod is still (it does not rotate). Instead, the nut is the one that rotates.
Please check out the video: youtube.com/watch?v=gZ7W4M-OSXI
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I posted a very similar design for a linear actuator online, a while back. http://www.instructables.com/i... Anyway, I can confirm that this type of system works in the field. Great minds think alike!
Those are very good questions:
It all depends on how the mechanism is used. It can be a compact mechanism, capable of reasonably high loads for a small CNC machine.
For heavier loads (>10kg? I don't have the means to measure forces accurately), proper bearings should be used.
Take it as a concept, for our final CNC mill we will probably be using a similar mechanism but with spinning threaded rod. It is as compact but less complex.
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