{"product_id":"3d-printed-sg90-micro-servo-robot-arm","title":"3D Printed SG90 Micro Servo Robot Arm","description":"\u003cp\u003eThis is a compact \u003cstrong\u003e3D printed robotic arm\u003c\/strong\u003e designed for hobby robotics, Arduino projects, STEM learning, and servo\/stepper motor experimentation.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eThe arm uses \u003cstrong\u003e4 SG90-style micro servos\u003c\/strong\u003e for joint and gripper movement, along with a \u003cstrong\u003e28BYJ-48 5V stepper motor and ULN2003 driver board\u003c\/strong\u003e for base rotation. It is designed as a light-duty educational robot arm, perfect for learning basic robotic movement, multi-servo control, stepper motor control, gripper mechanics, and Arduino-based robotics.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eThis model is intended for makers, students, and hobbyists who want a simple robotic arm platform they can build, test, modify, and improve.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eThe design is prototype-friendly and remix-friendly. It is not meant for heavy lifting or industrial precision, but it works great as a small desktop robotics project.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003ch2\u003eHardware Required\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e4x SG90-style 9g micro servos\u003c\/li\u003e\n\u003cli\u003e1x 28BYJ-48 ULN2003 5V stepper motor\u003c\/li\u003e\n\u003cli\u003e1x ULN2003 stepper driver board\u003c\/li\u003e\n\u003cli\u003e7x M3-style bolts and nuts\u003c\/li\u003e\n\u003cli\u003eArduino, Raspberry Pi, or compatible controller\u003c\/li\u003e\n\u003cli\u003eExternal 5V power supply recommended\u003c\/li\u003e\n\u003cli\u003eJumper wires\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe \u003cstrong\u003e7 M4-style bolts and nuts\u003c\/strong\u003e are used to attach the base to the housing and to mount the stepper motor to the base.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003ch2\u003ePrinting Notes\u003c\/h2\u003e\u003cp\u003ePrint orientation and tolerances may vary depending on your printer. Some light sanding or fitting may be required, especially around servo openings, bolt holes, and moving joints.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eFor best results, use a sturdy material like PLA+, PETG, or similar. Standard PLA should work fine for basic testing, but stronger materials may hold up better over time.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eFor the gripper inserts, I used TPU with a 10% infill pattern. \u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003ch2\u003eUsage Notes\u003c\/h2\u003e\u003cp\u003eThis arm is designed for \u003cstrong\u003elight-duty movement only\u003c\/strong\u003e. SG90-style servos are small and affordable, but they are not high-torque servos. Avoid lifting heavy objects or forcing the joints by hand while powered.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eCable management is left open for customization. If you plan to rotate the base repeatedly, keep the servo wires loose enough to avoid pulling or consider adding wire guides or a slip ring in a future remix. \u003c\/p\u003e\u003cp\u003eDesign by CornerStone 3D on MakerWorld (license: BY-SA).\u003c\/p\u003e","brand":"Mymadmanlab","offers":[{"title":"Default Title","offer_id":67391659049264,"sku":null,"price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0987\/0809\/5280\/files\/0_f2547dd4-f5a7-4517-9699-fc839dc66e6f.png?v=1784754584","url":"https:\/\/mymadmanlab.com\/products\/3d-printed-sg90-micro-servo-robot-arm","provider":"Mymadmanlab.com","version":"1.0","type":"link"}