I need a production-ready robotic welding arm built in Blender that I can drop straight into an industrial-simulation scene for unreal engine . The model should sit in the “moderate detail” sweet spot: clean, believable geometry with sensible poly counts, visible joints, cabling and a realistic torch head, but without the ultra-fine nuts-and-bolts treatment that would bloat file size. Please rig the arm so every axis of motion is functional—base rotation, shoulder, elbow, wrist, and torch swivel—and then create a short, looping cycle that shows a full weld sequence: move into position, strike arc, trace a seam, retract, and reset. All pivots have to align with real-world kinematics so the animation can be retimed later without drifting. PBR materials matter because the asset will sit under varied HDRI lighting. A single 4K texture set (BaseColor, Roughness, Metallic, Normal) in PNG or TIFF is fine; keep your UVs non-overlapping and logically laid out. Deliverables: • .blend file with named, organized collections • Baked and packed textures plus a turntable render (MP4 or GIF) • FBX export with animation for compatibility checking Acceptance criteria: the model imports into a fresh Blender scene with no missing links, the animation loops seamlessly at 30 fps, and the arm reaches every key joint limit without mesh distortion. If this sounds clear, let me know your estimated turnaround and any previous mechanical-rig samples you can share.