Make sure the beam is hitting the factory in the rear. HEHE....but seriously. It does need to hit the back of the factory. In order to make sure the placement is correct...whenever you build a beamemitter, factory, conveyor, or jumppad the front of the block will be facing toward you. So....

Until you get used to how the placement works, just do this. Build your beam emitter where ever it is you want it. Stand in the beam look at the beam emitter and build the factory a few blocks in front of yourself. If you place any of those blocks while looking straight down or straight at a wall it makes the direction inconsistent. So make sure you have a little angle and are building a bit in front of yourself. Just practice a bit and aiming them is pretty easy.....now remember....Use the beam to penetrate the rear of the factory :-P

Thanks!

Trying it now