Fanuc and the Numerical Control Revolution

TL;DR

Fanuc rose from Fujitsu's NC research division to dominate global CNC manufacturing by making numerical control cheap, simple, and modular.

Key Points

• 1.Numerical Control was born from a 1948 Air Force contract with John T. Parsons and MIT. Parsons wanted to automate a milling machine using punch-card numeric instructions; MIT researchers Pease and McDonough completed the first NC machine in March 1952, dubbing it a 'mechanical brain.'
• 2.Early US NC adoption was expensive, military-dependent, and commercially unappealing. The Air Force funded five companies to build incompatible NC modules, and the associated APT programming language added cost, leaving industry with the impression NC required government subsidies to survive.
• 3.Fujitsu launched its NC research in 1955, led by Dr. Seiuemon Inaba, starting from MIT technical papers. A partnership with Makino Milling Machine's CEO Tsunezo Makino accelerated development, producing Japan's first prototype NC device by December 1956 using a parametron circuit and Sanyo motor.
• 4.Inaba's 1959 electrohydraulic pulse motor breakthrough made NC practical for factory floors. Unlike MIT's expensive closed-loop machine, Fujitsu's open-loop design was simpler and more robust; the resulting Fanuc 220 controller launched commercially in 1960 under the name Fujitsu Automatic Numerical Control.
• 5.The Fanuc 260 slashed controller prices from 10 million yen to 2 million yen, driving rapid sales growth. Adding Makino's suggested 'offset' function and replacing curvilinear processing with straight-line logic plus transistorization boosted unit sales from 60 in 1965 to 388 in 1968.
• 6.American machine tool firms declined after private equity conglomerates bought them in the late 1960s and starved them of R&D investment. As detailed in Max Holland's 1989 book 'When the Machine Stopped,' US global export share fell to ~15% by 1970, while Germany led with ~30% behind Siemens-backed NC adoption.
• 7.Fujitsu spun off the NC division as the independent company Fanuc in 1971, with Inaba as leader. Fanuc then transitioned from hydraulic to DC electric servo motors via a 1974 licensing deal with Wisconsin's Gettys Manufacturing, abandoning its own patented pulse motors when they proved too noisy.
• 8.Fanuc's 1979 System 6 CNC controller, powered by the Intel 8086, became the global industry standard. By reducing discrete components 30%, making the system modular across lathes and machining centers, and pricing it accessibly for Japanese toolmakers, Fanuc entered the 1980s with over 50% global CNC market share.