Stylus force digital scales


Digital scales from Clearaudio and others range from $200-500. Amazon has 'em for $20. Why cant I use one of these instead and save big bucks?
tbromgard
@lewm as I said in my last post my experience is that even scales with non magnetic pans suffer from magnetic interactions. I own several scales with such pans and all read differently than my all plastic options (cartridge man and rega) - and all read exactly the same with reference weights (which are not magnetic)
folkfreak, That's very interesting and a bit disconcerting.  Steel can contain some low concentration of iron, so that may be the problem. I will check the weigh pan of my digital scale with an actual magnet, to see if the magnet "likes" the weigh pan at all.  FWIW, the weigh pan on my digital scale is white-ish in color and looks like it may be ceramic, not metal at all, which I hope is the case.
@lewm it may not be an issue of interaction with the pan but an effect upon the mechanism itself, I guess you might know by seeing if bringing the cartridge close to a previously loaded pan reduced the measured weight?
The very expensive Rega scale does its job nicely and quickly. It always tares itself before weighting. The weight pan is a little dish so the actual measurement level is very close to record´s surface. Highly recommended for all vinyl lovers. Many thanks Folkfreak :)
VTF only changes when you hit a warp because of inertia - the same reason you feel more force (and then less force) when driving over a bump in the road. It has nothing to do with the angle of the tonearm. The only change in the vertical force vector is as the stylus is raised vertically is due to the change in gravitational force as you move [mm to cm] further away from the center of gravity, and therefore the force of gravity changes. This is why it's called "Vertical" tracking force - vertical states the direction of the force vector.