If you like cookies but don’t have the time to make them, you can do a couple of things: You can use a mix, you can buy them already made, or, at some point in the future, you can get some help from a robot.
For his master’s degree in mechanical engineering at MIT, Mario Bollini taught a robot to bake cookies. He presented his project at Nerd Nite Boston at Middlesex Lounge last month. The robot, with a spatula bolted to his finger and covered head-to-toe in waterproof surgical gowns from a dentist’s office (Bollini didn’t want to damage the $400,000 PR2 robot), made several kinds of cookies. The only thing it could not do was cut the little rounds, so Bollini ended up with one giant cookie. “People get really upset if you give a robot a knife,” he explains. “It’s just a workplace safety [precaution] to not put a knife at the end of a machine that could be swinging erratically.”
The PR2 robot (PR stands for “personal robot”) was built by Willow Garage of Menlo Park, Calif., and had been part of other projects at the university. The idea to program the robot into a baker came to Bollini from Daniela Rus, MIT professor and director of the Computer Science and Artificial Intelligence Laboratory, who figured everyone likes cookies, and it wouldn’t hurt to get cookies for the lab — since the robot could make a lot of them. One cookie the robot made was chocolate Afghans, popular in Australia and New Zealand, which are a favorite of Rus because “they’re like brownies but less sweet,” she says.
Bollini, 26, who comes from Detroit, named the robot “Bakebot.” He is the cofounder of Global Research Innovation Technology, a start-up that makes off-road wheelchairs for people in developing countries.
After Bollini programmed it, the robot used its laser eyes to determine which ingredients were in each bowl, then followed the recipe in the same order a human might. One recipe for chocolate Afghans says to mix butter and sugar first, so that’s what the robot did. Then it stirred in flour, cocoa powder, finally Rice Krispies. To help the robot distinguish ingredients of the same color, like sugar and flour, Bollini put them in different colored bowls. The most difficult part was mixing, and the robot often ended up making a huge mess. It would accidentally stick its hand into the middle of the dough and mix too aggressively or dump the contents on the floor instead of in the pan.
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