數(shù)控技術(shù)1-wenkub.com
2024-12-30 15:05 本頁面
【正文】 Flame and laser cutting （ 激光切割）216。 Electric discharge machining, or EDM （ 電火花） 216。Theoretical preferred system more accurate167。 good stability.167。Indirect feedback monitors the output of servomotor.252。 low torque, limited speed and risk of missed pulse under load《 NC Technology 》 E－ mail: Application area216。 The system lacks feedback, that is , once the input signal is sent, there is no sensing device to confirm the action of the control signal.252。Openloop servodrive252。s first digital puter. 《 NC Technology 》 E－ mail: The evolution of NC To ensure that all . military airplanes were manufactured identically, the United States Air Force invited several panies to develop and manufacture numerical control systems that could handle the volume and repeatability. The first contract was awarded to the Parsons Corporation of Michigan, which then subcontracted development of a servo system for the machine tool to the Servomechanism Laboratory at MIT《 NC Technology 》 E－ mail: The Servo Mechanism laboratory at MIT《 NC Technology 》 E－ mail: The evolution of NCvThe specific goals of developing NC: production the quality and accuracy of manufactured parts manufacturing costs and assemble plex parts quickly《 NC Technology 》 E－ mail: The first NC machine producingidentical parts《 NC Technology 》 E－ mail: The evolution of NC? By 1960, NC was widely accepted and readily available.? The majority of these first generation NC machine tools required coded paper tape to run.? The engineers would generate NC code on their puters, then encode long strips of paper tape by punching hole patterns in them.? Later, the use of “manreadable” solved this problem《 N
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號-1