I have to say I find it amusing to hear about how so many people are jumping on the spin measuring device bandwagon. I guess some people feel an inherent need to quantify everything.
To me, the measure of whether you have a pitch or not is whether the ball moves in the direction it's supposed to, and how much it moves. I don't need a measuring device to tell me that.
It's like trying to determine who the best pitcher is by using a radar gun. It will tell you who is fastest, to be sure. I own one and use it now and then. But the best one is the one who gets outs.
To me, the measure of whether you have a pitch or not is whether the ball moves in the direction it's supposed to, and how much it moves. I don't need a measuring device to tell me that.
It's like trying to determine who the best pitcher is by using a radar gun. It will tell you who is fastest, to be sure. I own one and use it now and then. But the best one is the one who gets outs.