[Steven Smith]

I'll second the recommendation on the J1. I bought it for the same purpose in 2013. With it on a tripod next to the frisbee shooter, in the ~1200 FPS, reduced resolution mode, I still was able to get at least 40-50 frames of it moving through the shooter (as I recall).

With that, if you do things like make strong black marks on the wheels and frisbee, you have enough resolution to work with. Yes, it won't be "beautiful" looking footage, but even with blurriness, you can glean useful information. In this case, I could see how much the frisbee was bowing upwards and rubbing on the top of the shooter.

Lighting will be key though, having a strong light source will help a lot on picture clarity for these cheaper cameras.