A Robot With a Delicate Touch

Here in a brick factory that was once one of the first electrified manufacturing sites in New England, Rodney A. Brooks, the legendary roboticist who is Rethink's founder, proves its safety by placing his head in the path of Baxter's arm while it moves objects on an assembly line. The arm senses his head and abruptly stops moving with a soft clunk. Dr. Brooks, unfazed, points out that the arm is what roboticists call "compliant": intended to sense unexpected obstacles and adjust itself accordingly. The $22,000 robot that Rethink will begin selling in October is the clearest evidence yet that robotics is more than a laboratory curiosity or a tool only for large companies with vast amounts of capital. The company is betting it can broaden the market for robots by selling an inexpensive machine that can collaborate with human workers, the way the computer industry took off in the 1980s when the prices of PCs fell sharply and people without programming experience could start using them right out of the box. "It feels like a true Macintosh moment for the robot world," said Tony Fadell, the former Apple executive who oversaw the development of the iPod and the iPhone.