CAD and rope: what they have in common

1. Step 1. CAD — is used in — 3D printer. Models from CAD.
2. Step 2. 3D printer — has part — Lead screw. The axes are moved by screws.
3. Step 3. Lead screw — is part of — Screw-cutting lathe. The lead screw moves the cutting tool.
4. Step 4. Screw-cutting lathe — evolved from — Lathe. Maudslay added a lead screw and a slide rest.
5. Step 5. Lathe — has part — Rope. The bowstring wraps around the workpiece and turns it.

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