Combination Crafting is an in-world multi-block crafting setup where items are combined together to create something special.
This setup consists of a Crafting Core in the center and pedestals placed around it. Pedestals can be placed anywhere around the Crafting Core in a 3 block radius, and must be on the same Y level.
Power must be provided to the Crafting Core for this structure to function.
Recipes have a center item which goes on the Crafting Core, and pedestal items which go on the pedestals around it.
Right clicking on the side of the Crafting Core will show you information about the current crafting operation, such as progress or power cost, as well as how much power is stored in it.