I want to grind a specific front angle on a piece of metal in the horizontal plane while at the same time having a specific secondary angle in the vertical plane.
If I present the workpiece at, for example, 45 degrees, dead flat to the grindstone (a flat plane 90 degrees to the horizontal) then a 45 degree angle is cut. If however, I then tilt the workpiece down by say a secondary angle (e.g. 30 degrees) I then need to tilt the workpiece in the horizontal by a further number of degrees to maintain the 45 degree primary angle.
If we call the primary angle X and the secondary angle Y, how does X vary with Y?
Thanks!