1. The entire mass of a tonearm/cartridge is supported at two points, the bearing and the stylus.
2. Downforce (aka, VTF) is an measure of how much force gravity is exerting on the *portion* of the tonearm/cartridge mass that's being supported by the stylus. (The remainder of the tonearm/cartridge mass is still being supported by the bearing.)
3. When you raise/lower your scale (or arm base, as with VTA adjustment) it changes the angle of the arm. This shifts a small percentage of the armtube and it's mass from one side of the bearing support point to the other.
4. More mass on the scale side of the bearing = more weight being supported by the stylus = higher VTF. Less mass on the scale side of the bearing = less weight being supported by the stylus = lower VTF.
2. Downforce (aka, VTF) is an measure of how much force gravity is exerting on the *portion* of the tonearm/cartridge mass that's being supported by the stylus. (The remainder of the tonearm/cartridge mass is still being supported by the bearing.)
3. When you raise/lower your scale (or arm base, as with VTA adjustment) it changes the angle of the arm. This shifts a small percentage of the armtube and it's mass from one side of the bearing support point to the other.
4. More mass on the scale side of the bearing = more weight being supported by the stylus = higher VTF. Less mass on the scale side of the bearing = less weight being supported by the stylus = lower VTF.