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Purpose-This paper is based on design of a quadruped robot and manufacturingit with 3-D printer followed by its detailed analysis. It focuses on theadvantages of additive manufacturing rather than conventional manufacturingtechniques and also highlights its limitations. The consequences of choice ofdifferent materials for 3-D printing are evaluated in this report.Design/methodology/Approach- The parts were designed in CAD software and madeinto Stereo lithography files, which were fed into the 3-D printing software.They were printed with the selection of ABS material. Low torque servos wereemployed in the beginning of the assembly and were controlled with the ArduinoUno micro controller. Findings- The versatility of legged robots requirematerials with high strength to weight ratio, where 3003 aluminium alloy sheetsproved to be a better choice than conventional ABS. The ABS legs buckled underload and proved to be an inferior material choice for fabrication. Thealuminium sheet fabricated legs not only imparted structural stability to therobot but also allowed in selection of more powerful servos for addedstrength.The bot could now achieve significant level of stability. ResearchLimitations/Implications- The power supply used for powering the bot was ofSMPS type of power supply which made it less mobile. Due to the huge demand ofcurrent by the high torque servos used later, the power supply became a hugelimitation which can be overcome by applying Lithium ion batteries. PracticalImplications- The bot can be used for SLAM and autonomous navigation in areaswhere it is almost impossible for humans to access into. Originality/Value-This paper shows a concrete study on efficacy of quick CAD designing and rapidfabrication.

Designing, 3D Printing of a Quadruped Robot and Choice of Materials for Fabrication