This is a 3D printer attachment to a CNC machine that utilizes a standard caulk gun tube for producing 3D printed objects.
The project page for this item located here:
Adventures in 3D Printing
Here is a picture of the caulk tube extruder attached to my CNC mill.
Here is a picture of an item made with the caulk extruder.
Finally a video of the extruder in action.
It is pretty straight forward but the big sticking point for most people is that you need to start with a CNC milling machine that has the capability of running an extra motor for the extruder.
I swap my extra motor between my rotary table and extruder as needed. I would like to come up with more uses for the extra motor.
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