Whomppity whomp, the hammer pounds away as I draw the copper rod back and forth to form the taper.  It seems silly to have this machine do what I can do over the anvil but it does save a little bit of time.  The copper, when hot, moves like butter and it's easy to overdo the drawing operation. Fortunately I have pretty decent control over the speed and the force of the hammer blows thanks to the foot control which regulates the amount of air applied to the ram. By the way when the copper is being heated, keep it at a dull red rather than brighter.  Once the metal comes up to that heat it doesn't take much to over heat the metal which may make it "hot short".  That means over a certain temperature some metals fracture under impact.  This is a common problem with bronze so it's important to pay attention to the working heat.