The Wheel of Pain is a large object and will require some space while at the same time being easily accessible.

You can place a Wheel of Pain by using the Construction Hammer.

Access the Wheel of Pain by pressing Interact while looking at it.

Truncheons are used to knock out enemies instead of killing them.

Craft a Truncheon from your inventory crafting panel Inventory, or a Torturer's Worktable.

A Binding is a required tool for dragging knocked-out enemies to your Wheel of Pain.

Craft a Binding from your inventory crafting panel Inventory, or a Torturer's Worktable.

Use your bindings on an unconscious human fighter or archer, then drag them to your Wheel of Pain. There, they will be broken over time and become thralls in your employ.

Drag enemies by equipping your Binding and interacting Interact with the unconscious body.

Gruel is one of the most basic food-types available.

Place Plant Fiber, Seeds and fuel in the Campfire's inventory and activate it by pressing the Play button.

After the gruel has cooked, take it from the Campfire's inventory for yourself.

Gruel lasts for a long time, and is perfect for enemies in the Wheel of Pain.

Foods are used up in the conversion process for a thrall, and you may need to cook a lot of gruel to make sure the conversion finishes.

After you have placed your thrall, approach them, and press CommandsMenu to interact with them.

You may instruct a thrall to follow you by holding down the CommandsMenu and choosing 'Follow' from the radial menu.