A DIY CNC router I designed to allow a 4th axis or rotary axis. If you didnt want the rotary feature this feature could also allow the use of an ATC or "Auto Tool Changer". Its based on several other designs Ive seen around the web and on cnczone.com.
The entire Y/Z car can be moved to the extreme right side of the table where it can then use the 4th or rotary axis. This can be used to do spindle turnings, spirals or any other number of creative projects.
Its stepper motor driven, running a 3:1 gear reduction on the X and Y axis. The Z axis is screw driven.
The X and Y axis are both rack and pinion driven with the entire r&p system for the X axis hidden under the spoil board. This not only helps to keep debris out of the system but also allows a neater appearance overall which is something I was striving for.
The R&P system Im using is from cncrouterparts.com. This is an excellent design and I think very affordable for what you get. You only supply the rack itself, everything else you need comes with the system for under $90.
The table is flat with no side rails making easy loading/unloading of materials. I liked this concept so I didnt have to reach down and into the bed to place materials or adjust clamps etc.
Im sharing this model in the spirit of the DIY community and hope that it inspires others to build this or one similar.
If you do use this design I would love some feedback and to see your build!! #4th_axis #CNC_router #diy #diy_cnc #rotary_axis