Pregnancy test and CNC machine: what they have in common

1. Step 1. Pregnancy test — uses — Capillary action. Capillary flow of the liquid.
2. Step 2. Capillary action — is used in — Fountain pen. Ink flows through the nib’s capillaries.
3. Step 3. Fountain pen — uses — Ink. Ink.
4. Step 4. Ink — is used in — Inkjet printer. Ink.
5. Step 5. Inkjet printer — has part — Servomotor. Stepper motors for the carriage and feed.
6. Step 6. Servomotor — is part of — CNC machine. Servo drives move the axes.

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