SirSengir/BuildCraft — pull request #210 by AartBluestoke (2012-09-04 09:32:02+00:00)
Title: Quary should not use energy when 0 movement would result

Position is stored in 1/32's so if the movement is less than that, it will take the energy, then not move at all. This means that energy less than about 3.2/tick will never move the quary arm.