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I look at a 3D printer as an additive counterpart to a CNC machine. I think the lack of a z-axis is what separates drawing machines.

> Is a 3D printer closer to a drawing machine or a conventional printer?

I believe so. The ancient Greeks would scale up a sculpture using a cage placed around it. XYZ coordinates would br drawn from this using measuring sticks. This is, effectively, an analog version of our 3D printers and also an. Extra dimentional version of a drawing machine.

Drawing machine, its a popular small project to print a pen adapter and use them to draw