tracked robot 3d model

Create a functional 3D-printable tracked robot with an articulated arm and extended jackhammer tool. Optimize for FDM (PLA/PETG), max 220x220mm parts, ≤45° overhangs, 0.2–0.4mm tolerances, metric screws (M3–M5). Base: dual tank tracks, drive sprocket (6mm shaft), idler with tensioner, 3–5 rollers, space for motors, battery, electronics. Platform: Arduino + driver mounts, cable channels. Arm: 4 DOF, reinforced, MG996R mounts, 608 bearings, internal wiring. End effector: jackhammer with modular segmented extension reaching 5m total length (scaled model), assembled via interlocking tube sections, internal rod/cable for stability, fixed 120° angle, chisel tip, reinforced wrist. Control: manual lever system inspired by backhoe controls, using mechanical linkages or potentiometers for human operation. Assembly: modular, screw फिट, alignment pins. Print: 2–3mm walls, 20–60% infill. Output: separate STL files.