![]() ![]() A common example of three-axis motion is a crane, which is capable of moving side to side, up and down, and back and forth. Three-axis and four-axis robots are where things start to get a bit more functional.Ī three-axis robot can move along all of the X-Y-Z axes. ![]() One- and two-axis robots are not common due to their highly limited range of motion. Robot axes can be thought of in terms of an X-Y-Z Cartesian plane. This is true for pneumatic robot arms as well, which use compressed air and valves rather than mechanical motors. The number of axes is generally determined by the number of motors in the robot, so you can often get an approximation of a robot’s degrees of freedom by counting the number of motors it has. ![]() Too many degrees of freedom can also be a problem, making the robot overly difficult to control and program. Without enough movement, a robot won’t be able to perform the necessary tasks. So, DoF is a core part of a robot arm's design, determining its range of capabilities, noted gripper provider Robotiq. In most cases, a robot's number of axes cannot be changed after it has been built (although mounting options can change that). Here are the basics for determining the right number of axes for your robot. The degrees of freedom directly affect a robot's functionality, so it's crucial for designers, integrators, and operators to choose the right number of axes.ĭepending on the application, more degrees of freedom ( DoF) may not always be better. Every robotic arm has a set number of axes or degrees of freedom of movement, ranging from one to 12 to 13 axes. ![]()
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