Machine spindle e gutenberg printing press: o que têm em comum

1. Passo 1. Machine spindle — faz parte de — Milling machine. It turns the cutter.
2. Passo 2. Milling machine — evoluiu para — Máquina CNC. The first CNC machines were milling machines (MIT, 1952).
3. Passo 3. Máquina CNC — utiliza — Program control of a machine. The tool’s movement is set by a program — at first on punched tape.
4. Passo 4. Program control of a machine — é utilizado em — Jacquard loom. The chain of cards is the program of the pattern.
5. Passo 5. Jacquard loom — funciona como — Gutenberg printing press. An analogy, not proven influence: both set type and a chain of punched cards are a replaceable pattern that a machine reproduces over and over.

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