There are two crafting machines in Factorization, the Craftpacket Maker and the Craftpacket Stamper.
These machines need to be used with, for example, RedPower's tube system to automate crafting processes.
The Maker makes Craftpackets . This is fueled by paper, which goes in the bottom slot. Then you need to select which crafting slots items will go in. Place items in the top slot to put those items into a craftpacket. When there are items in all the selected slots, the craftpacket will be moved to the right slot. If the craftpacket is blue, that means it can be crafted into something.
Place craftpackets in the left slot of stamper to craft the packet. If you place an invalid or incomplete craftpacket in, the contents will be dumped to the other slot. You can also put in, for example, bones to get bonemeal. If a recipe has multiple results, such as for making cake, all the other used ingredients will be placed into the output slot.