Cobot vs. Industrial Robot Palletizing: Questions to Resolve Before Selection

A “cobot” label does not establish that a palletizing installation can operate beside people without additional protective measures. Decide first whether direct human interaction is part of the task, then evaluate the complete application and its required output.

Collaborative applications are part of industrial robotics. The common buying comparison is between a collaborative-capable robot arrangement and a cell designed to separate people from automatic motion. Those categories do not provide a universal payload, speed, or floor-space limit.

Specify the human task

OSHA’s technical manual distinguishes applications by worker interaction and calls for risk assessment across the application lifecycle. It considers the end-effector and workpiece as well as the robot. Use that application-level approach when requesting engineering evidence; this article does not certify a cell or prescribe protective settings.

Write down why someone must approach: replenish pallets, add sheets, clear a fault, inspect a load, or share an actual handling task. Record whether automatic motion is intended to continue during that interaction. Occasional access for replenishment does not by itself prove that the process requires collaborative motion.

Ask for configuration-specific evidence

Item to resolve	Information to request	What remains unknown without it
Carried load	Tool, adapter, hoses and product masses; offsets and loading limits	Whether a named payload rating covers the real tool and load
Reach and height	Loaded-tool path to every required pallet position	Whether the full pattern can be built without interference
Package behavior	Retention tests and allowed surface/contact conditions	Whether a shifting or released case creates an additional hazard
Worker interaction	Task list and application risk assessment	Which hazards and operating modes have been considered
Protective measures	Documented functions, configuration, verification responsibilities	Whether the proposed application has been adequately assessed
Output	Measured or modeled cycle with intended measures active	Whether an unrestricted demonstration represents production
Recovery	Documented response to mis-picks, incomplete pallets and stops	How ordinary exceptions affect work and output

These requests deliberately avoid generic safe-speed or safe-force numbers. The responsible parties must determine the applicable requirements using current equipment documentation, the installation, and its jurisdiction.

Include the product in the assessment

A tool with a smooth exterior can still carry a carton whose corners, contents, or position create hazards. A pallet adds changing geometry as the stack grows. Record the largest and smallest products and the locations where people may approach or become trapped against other equipment.

Do not use a brochure image of a person near an unloaded arm as evidence for a loaded palletizing operation. Ask which configuration was assessed and what changes would require reassessment.

Compare accepted production, not the demo setting

Request output for the agreed pattern and operator activity. If a protective response changes motion or pauses production, that behavior belongs in the capacity model. If a separated layout needs extra pallet handling or access space, include that scope as well.

Start with the complete-system boundary and gripper inputs. Put the intended human tasks, product envelope, pallet height, and acceptance responsibilities in the RFQ checklist. The palletizing index connects these application questions to the other selection decisions.