Board Thread:Questions and Answers/@comment-110.143.107.211-20130715083523/@comment-5627887-20130715083910

Can you see the blue energy bar (which shows stored MJ in the pulverizer) filling up as your Redstone Engines are pumping? If not, then power isn't reaching the machine properly. It will fill up to 800 MJ before it has enough to pulverize one Obsidian into Pulverized Obsidian.