Flippy the burger-flipping robot that started work this week in a California restaurant has been forced to take a break because it was too slow. The robot was installed at a Cali Burger outlet in Pasadena and replaced human cooks. But after just one day at work the robot has been taken offline so it can be upgraded to work faster. Its human helpers are also getting extra training to help the robot keep up with demand. In a statement Miso Robotics, which made Flippy, said it was testing the code that controls the robot to ensure that it can cook quickly enough to fulfil orders at peak times. Prior to starting work, Flippy was said to be capable of cooking up to 2,000 burgers a day. Cali said that it started to use the robot to get around the problems it has recruiting staff. The high turnover rate among staff in fast-food restaurants meant it often spent time and money training people to prepare food only to have them leave after a few months. Eventually, said the chain, burger-flipping robots will be installed in up to 50 of its restaurants.