How does switching between products actually work?

Different product sizes and pallet patterns can be managed through software by selecting preprogrammed recipes, rather than reconfiguring the machine by hand for every changeover.

When is a physical changeover still needed?

If the gripper can accommodate the product variations, no physical changeover is required between runs. A gripper swap is only needed when a new product falls outside what the current gripper can handle.

What software manages these recipes?

See What Is EasyStack Software? for how Reeco's palletising software lets operators create and adjust these patterns without specialist programming knowledge.