The Matter Beamer sends material items to a Spawner. It has one input slot, uses FE while active, and beams items only when the linked spawner can use them.
Linking
Use a wrench on the Matter Beamer, then use the wrench on the target Spawner. Wrenching the selected beamer again clears the destination.
Operation
Give the beamer a redstone signal and insert materials needed by the spawner recipe. Infusing sends more items per pulse and reduces FE cost.