So in a cnc machine, the screw that drives the x,y,z axiis are called "lead screws". I am constructing a machine that displences fluid at percise volumes. It will be essencially a seringe with one way valves coming in and going out. To open the "check valve" it requires at least 1.5 psi. If I am using a motor, with a lead screw to push down the plunger in the syringe, how much torque will I need to create 1.5+ psi in the syringe cylinder?