A jig is any of a large class of tools in woodworking, metalworking, and some other crafts that help to control the location or motion of a tool. Some types of jigs are also called templates or guides. The primary purpose for a jig is for repeatability and exact duplication of a part for reproduction. An example of a jig is when a key is duplicated, the original is used as a jig so the new key can have the same path as the old one. Since the advent of automation and CNC machines, jigs are often not required because the tool path is digitally programmed and stored in memory. Jigs may be made for reforming plastics. Jigs or templates have been known long before the industrial age. There are many types of jigs, and each one is custom-tailored to do a specific job. Many jigs are created because there is a necessity to do so by the tradesmen. Some are to increase productivity, to do repetitious activities and to do a job more precisely. Because jig design is fundamentally based on logic, similar jigs used in different times and places may have been created independently

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.