This is vanilla modification for Minecraft that allows the player to create Automatic Crafters, which can be used with redstone to do more, such as refilling dispensers with arrows. It can be created by placing a hopper down and filling it with items with the following layout:Once the hopper is filled with the correct items, just drop a crafting table item on top of the hopper and a small crafting table should appear inside the hopper block model. If there is a block directly under the AutoCrafter, it will lock itself, and no items will be able to be crafted while it's locked.
Inside, it will look like this:As the item says, you will need to place the item you want the block to automatically craft on the last slot of the container. The AutoCrafter will take the materials required to craft the item from the top of it, and summon the new crafted item below itself, where it can fall into more hoppers or a water stream to be collected
If you ever want to get rid of your AutoCrafter, simply destroy it and you will get your hopper and crafting table back, but none of the materials that went into the hopper before crafting, so make sure you place it well in the first place.
This contraption is divided in two sections: Base, and recipes. The base is the core of the machine, and recipes can be added later. You can get this contraption by using a single command, or via a schematic.Before installing, make sure that you are in Minecraft 1.8.4 or higher and be sure to install this in the spawn chunks