--- title: How a factory works: belts, robots, checks and people — a lesson of Mova's school · trees and pragmatics description: «How a factory works: belts, robots, checks and people», a lesson of the technology course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: A factory is a building where the same thing is made again and again, thousands of times a day, by machines and p --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Technology](https://md.mova.elamur.ai/free/en/corpora/school/technology/) / How a factory works: belts, robots, ch… # How a factory works: belts, robots, checks and people Lesson 1 of the technology course of Mova's primary school: 17 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/technology/1-how-a-factory-works/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/0/) — A factory is a building where the same thing is made again and again, thousands of times a day, by machines and people working in a fixed order. - [1](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/1/) — The things ride along on a conveyor belt, so each machine or worker does one small job and passes the thing on, like a relay race where the baton is a biscuit or a bottle. - [2](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/2/) — Your chocolate bar was probably never touched by a bare hand: machines mixed, shaped, wrapped and boxed it, while people in hairnets watched the machines, fixed jams and tasted samples. - [3](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/3/) — Cameras and metal detectors check every item, and anything wrong is knocked off the line before it can reach a shop. - [4](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/4/) — Machines are strong and fast and cannot see you, so factories are full of fences, guards and big red stop buttons, and visitors keep to the marked walkways. - [5](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/5/) — A conveyor belt is a long loop of rubber or metal pulled round by motors and rollers, carrying each item past the machines and workers in order. - [6](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/6/) — In 1913 Henry Ford's moving assembly line cut the time to build a car from about twelve hours to about an hour and a half. - [8](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/8/) — An emergency stop button cuts the power at once and stays pressed in until someone has checked the problem and twisted it out; it is usually red on a yellow background. - [9](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/9/) — In a factory, anyone who sees something going wrong may press the emergency stop, even a visitor. - [10](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/10/) — A robot arm has an electric motor in each joint that turns by exact amounts a computer orders, so it repeats a move thousands of times without tiring; some place parts to about a tenth of a millimetre. - [11](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/11/) — Robot arms do not see people the way we do, so they work behind fences or with sensors that stop them when someone comes close. - [12](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/12/) — Food-factory workers wear hairnets, white coats and gloves, wash their hands and often walk through a shoe-cleaning bath, so no hair or germs get into the food. - [13](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/13/) — A quality-check camera photographs every item, a computer compares it with a perfect example, and a puff of air or a flap pushes bad ones off the line; some check more than a thousand items a minute. - [14](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/14/) — A metal detector at the end of a food line throws out any packet with even a tiny bit of metal, and staff test it every few hours by sending a packet with a small metal ball through on purpose. - [15](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/15/) — A forklift truck lifts pallets on two steel forks, and a heavy counterweight at the back, which can weigh as much as a small car, stops it tipping forward; forklifts are quiet and turn sharply, so near them people keep to the marked walkways and never stand under a raised load. - [16](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/16/) — A barcode is a row of black and white lines standing for a number that a computer looks up; the first product scanned at a shop till by barcode was a pack of chewing gum in 1974. - [18](https://md.mova.elamur.ai/free/en/corpora/school/technology/1-how-a-factory-works/18/) — In a big warehouse a computer remembers which numbered shelf every box is on, and heavy loads go at the bottom so nothing falls; some warehouses are as big as dozens of football pitches. - next →: [Chocolate and sweets](https://md.mova.elamur.ai/free/en/corpora/school/technology/2-chocolate-and-sweets/) - ↑ back to [Technology](https://md.mova.elamur.ai/free/en/corpora/school/technology/)