Zepp Data -- Hand Speed, Bat Speed, Time to Impact

Linedrive. Your sensor doesn't capture the 3D swing properly either. I've went around and around with zepp about this and they just say it's my fault. I have tried multiple sensors w the same issues so it must be.  But what's strange is that any swing over 70mph gets the reading way in front  anything under it displays properly  same swings  

Also, when I absolutely have a perfect feeling swing w speed and crush the ball, the sensor never picks it up. I mean never. I hit 200 balls and crush 20 and it won't capture the 20. 

Another issue sue I have is that I am pretty consistent and it will vary my swing speeds from 55 to 85 with no reason.  Drives me nuts. 

And back to the uppercut.  The only reason I am doing that is because the sensor is showing a -30 and -20 attack angle.  

With th all these issues it makes me question the accurate data zepp provides. 

We had some funny readings when we first got it and Zepp told me to make sure the sensor was fully seated against knob, so minimal space.  Also, they said he was moving the bat to much pre-load that was messing with it, so he calmed his hands pre-load and that helped.

If you have any pre swing movements (like a barrel tip) Zepp does a crappy job of capturing your swing. It takes all movement as forward movement. Your 3D swing appears out in front of you, your time to contact appears long, and your swing plane is not measured accurately (down when it is truely up through the zone). I found it useless for anything but a static (A to B) swing. 

They told me the same but it still does it. 

Do you guys think that bc the 3D swing is off it effects the readings?  I am obviously swinging up on the ball and it consistently reads - attack angle. 

I have never seen the inverted attack angle.  It makes me think it's not calibrated right, but know you are probably doing that correct, so I'm not sure... I'm surprised Zepp support can't figure that out.

I guess if you really think about it there is a lot that goes into capturing the attack angle. Zepp can capture hand speed the easiest I suppose but everything else is a function of that and path. Even barrel speed at impact seems hard to capture. We know the path and hand speed but how can we calculate bat speed off that?  It would be interesting to know how Zepp actually works, captures, and analyzes data. 

I guess whats hats really strange about this is that someone like pg puts a lot of weight into this data when I'm not convinced it's accurate. 

The barrel speed should be just a calculation based on bat length, so if you know how fast the knob is traveling and orientation, you should have enough to get the barrel speed from the bat length entered in your setup.  I assume there is some type of accelerometer in the zepp for the knob flight info.

Im confused...son has hand speed at 35 which is in the "major league average" range, but bat speed was 75 which was in hs/college average range....not sure how all this works I guess..

Ha. Your son has the same swing mine does.  You should jump over to this thread:

http://community.hsbaseballweb...23#43530238432381423

 To address your question more though, I would think that the Pros swinging much heavier/longer bats when the hand speed is the same as our boys, is going to produce a greater barrel velocity as it comes around.