3D Printed Robot Arm

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http://www.instructables.com/id/Build-a-3D-Printed-Robot-Arm-with-Servo-Control/ This fully functional robot arm is constructed from a wide range of 3D printed components that seamlessly snap together. The arm boasts three precise servo-controlled joints, plus a rotating base and gripper. Control over the entire system is managed through an intuitive series of buttons that connect to a cleverly hidden Arduino Uno housed within the base. A simple circuit makes connecting the servos and buttons to the Arduino quick and easy, allowing for rapid setup and assembly. Arduino Uno - RadioShack 276128 Standard Servos (4x) - RadioShack 273766 Micro Servos (2x) - RadioShack 273765 Momentary Push Buttons (8x) – RadioShack 2751566 On/Off Switch - RadioShack 55050508 (available online) Potentiometer and Knob (specific resistance not required) - RadioShack 271215 and RadioShack 274416 Green LED - RadioShack 276022 Printed Circuit Board - RadioShack 276149 10K Ohm Resistors (8x) - RadioShack 2711335 220 Ohm Resistor - RadioShack 2711111 Various Wires and Connectors Nuts and Bolts (16x 8-32, 1/2” long) Afinia 3D Printer - RadioShack 277181 1kg Roll of PLA Filament - RadioShack 277163 Power Supply, Capable of 2A (a standard bench supply was used for prototyping; a regulated power supply like RadioShack 55057676 or RadioShack 22507 should work) The robot arm measures approximately 20 inches in length, requiring considerable time and material to print. The components are designed to fit the bed of the Afinia H479 printer, with some parts printable together on the same platform to save time. Printing settings used included a resolution of 0.25mm and hollow fill for all parts (other settings were set to default). Additionally, a raft was employed to assist part adhesion to the print platform and help the printer compensate for table irregularities. The estimated total print time for the robot arm is approximately 32.5 hours, although some parts can be printed together as mentioned earlier (the estimate was generated using the print preview function of Afinia's software). Including raft material, a total of 842.8g of filament is used, which means it can be printed from one 1kg roll. Most components have flat sides that should face the platform for optimal printing. Many parts also feature delicate tabs for holding cables, so handle with care when removing raft and support material. Study the STL file beforehand to identify potential fragile areas.