LBR iiwa Review (4★)

Editorial

LBR iiwa invented the modern sensitive-arm category. Torque-per-axis sensing and 7-DoF kinematics still matter when you are mating fragile connectors or assisting in medical workflows. It loses on payload and approachability to UR10e for general SME cobots — and that is fine. Spec iiwa when force control quality is the product; spec UR when time-to-first-part and integrator availability dominate.

Pros

• Torque sensing in all 7 axes enables true compliant assembly and human hand-guiding at industrial quality
• Redundant 7th joint solves singularities that trap 6-axis cobots in fixture-dense cells
• Medical/electronics heritage — force-controlled fastening and sensitive part mating are proven
• 1.8 m/s capable motion when safety contexts allow — faster than UR’s collaborative caps in many recipes

Cons

• 7kg payload is half of UR10e — wrong tool for heavy palletizing
• $50k+ positioning plus KUKA system complexity raise the skills bar for SMEs
• Programming ecosystem feels heavier than PolyScope for first-time cobot buyers
• Newer adaptive arms (Flexiv et al.) chip at the “only sensitive arm” narrative