Our robot arm has 5 motors and thus is advertised as a “5 DOF” robot arm. For a robot arm this usually means the number of motors that the arm has. In robotics however “degrees of freedom” or DOF is usually considered to represent the number of movable joints that a mechanism has. If you are an aeronautical engineer then to you degrees of freedom will be likely be represented by the classic three dimensions and directions an object can move in: Turns out it can mean different things depending upon what field you are in. What exactly does the term “degrees of freedom” mean? 5 Degrees of FreedomĪs with most robot arms the DFRobot kit is advertised as a “5 DOF” or 5 degrees of freedom robot arm. The only tools required to assemble the arm are a phillips screwdriver (a #1 works well) and a set of pliers. The gripper mechanism comes assembled except for the servo motors.Ī complete parts list for the DFRobot 5 DOF Robotic Arm Kit is shown here:ĭSS-M15 DF Metal Geared Standard Servo 15Kg 180° The servos, brackets and hardware come packages in individual plastic bags with identifying labels. Two 4 Kg/cm servos for the gripper mechanism.Two 15Kg/cm servos for the base and elbow.The arm is powered by 5 servo motors, all standard sized: The brackets and supports for the arm are constructed from black anodized aluminum which makes for a strong support. The DFRobot 5 DOF Robotic Arm Kit consists of all of the servo motors, brackets, fasteners and other hardware that you will need to construct a small but powerful robotic arm complete with a gripper mechanism. Let’s begin by looking at what it is we will be building.
Once we get the arm built we will also put together a simple Arduino controller so that we can control the movement of the arm and its gripper. The arm we will be working on today is the DF Robot 5 DOF Robotic Arm kit. Today we will be constructing another robot arm, one with more power and capabilities than the MeArm.
Robot arms are also very popular robotics experimenters projects, in fact we discussed another robot arm when I built the MeArm a while back. For decades these mechanical appendages have been put to use on assembly lines manufacturing everything from automobiles to electronic circuit boards. Robot arms are pretty familiar sights in the 21st century.
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