The first robot ever made of 3D printed solid, liquid. First of all, scientists at MIT have printed a small six in 3D. Leg robot using new technology for printing both solid and liquid materials. The new method makes the team automatically 3D out-of-print Dynamic robot single step, without assembly, using a commercial 3D printers are available. \"Our approach, which we call \'printable hydraulic system\', is a step in the rapid manufacture of functional machines,\" said Daniela Rus from the Massachusetts Institute of Technology (MIT . \". \"All you have to do is stick the battery and the motor together and you have a robot that can almost come out of the printer,\" said Rus . \". The researchers printed a small six in 3D. A leg-type robot that can crawl through 12 hydraulic pumps embedded in its body. Printing liquid is a confusing process, which means that additional post processing is required for most methods Print steps such as melting them or manually scraping them clean. This step makes liquid difficult. Based on the method that the factory will adopt Scale manufacturing. Using the printable hydraulic system, the inkjet printer deposits a single material drop of 20 to 30 microns in diameter or less than half the width of the human hair. Printer layer-by- Layered from the bottom up. For each layer, the printer stores different materials in different parts and then uses high Strength UV curing all materials except liquid. The printer uses a variety of materials, although at a more basic level, each layer consists of a solid \"photopolymer\" and \"non-polymer\" This is a liquid. \"Inkjet printing gives us eight different ways to print -- \"The head stores different materials at the same time,\" said Robert MacCurdy from MIT . \". \"It gives us very fine control over material placement, which allows us to print complex pre- \"It\'s full of fluid channels,\" he said . \". Another challenge for 3D printing liquids is that they often interfere with droplets that should be set. To solve this problem, the team printed dozens of test geometry in different directions to determine the correct resolution to print the solid and liquid together. It\'s more difficult to print liquid and solids with other 3D printing methods such as melt printing, says MacCurdy Deposition model and lasersintering. Researchers 3D printed a small six-legged robot weighing about 1 kg. 5 pounds, less than 6 inch long. To move, a DC motor rotates a crankshaft and pumps the fluid to the leg of the robot. In addition to the motor and power supply, each component is printed in one step and no assembly is required. The key components of the robot include several sets of \"bellows\" that are printed directly in 3D into their bodies \". To push the robot, the bellows uses fluid pressure and then converts it into mechanical force.