Hey! This thing is still a Work in Progress.
Files, instructions, and other stuff might change!
Linear actuator concept for CNC machines
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Published on January 28, 2013
Description
We are looking for new ways to create a compact solution for moving the axis of a CNC machine. This is one of the concepts.
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
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
Instructions
This object would require some redesign to fit your application. I have uploaded all the OpenScad sources.
License
Linear actuator concept for CNC machines by carlosgs is licensed under the Attribution - Share Alike - Creative Commons license.
Very novel take on an linear axis :)
But won't it take up more space as the threaded rod extends/moves outside the machine unless the motor is placed on the moving part?
Btw. the bearings looks like regular bearings shouldn't there be some thrust bearings in there as well?
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.