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CNC 4th Axis


Super User
This is starting to get off topic lol.
Lathe, 2 axis x and z

3 axis mill x,yand z
20171106_211627 (1).jpg

4 axis mill x, y, z and part rotates

5 axis mill x,y, z the part rotates on 4th axis and the head tilts,


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Super User
I always thought 4th axis meant about a rotational axis over & above the 3 normal linear axis. But I think there is a more robust definition like below. I found this definition on the internet, so it must be true LOL. I guess you could have a machine with no rotary component but some other 'direction the cutting tool could move' and that might also be a 4th axis? (Although I cant think of one off hand).

The term “5-axis” refers to the number of directions in which the cutting tool can move. On a 5-axis machining center, the cutting tool moves across the X, Y and Z linear axes as well as rotates on the A and B axes to approach the workpiece from any direction.
c axis.PNG I borrowed this image from my machines manual.