Aug 01, if there are any rocks or iron ore, please clear them out before turning on the crusher. check whether the electrical equipment and signal instrument are working properly. check whether the discharging opening meets the requirements to guarantee the product size, otherwise adjust the discharging.Calculator online for a right circular cone. calculate the unknown defining surface areas, heights, slant heights, volume, and radii of a cone with any 2 known variables. online calculators and formulas for a cone and other geometry.