Hello. I'm having issues with the accuracy of my launch monitor. I use it outdoors in the shade, good golf balls. One drive will show 3 yards right, the next drive I hit, say the same spot will show 25 yards right. I hit another 5 yards right and it's showing 15 yards left. The monitor is perfectly level. I don't get it. Any suggestions? Thanks, Gary
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This went 8 yards left. Forgot to add a pic -
So did gc2 show it went 8 yards left aswell?Comment
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This is from FS optimizer and 8 yards left looks about right.Comment
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It did show 8 yards left as well. How is that possible? Path is 7 degrees in to out with the face 8.7 degrees open to the path. Shouldn't that be a big push? I don't get it. Thanks for your responseComment
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This is a long shot but do you have a driver with moveable weights like an M1? If you have the weights extremely towards the heel the center of gravity would not line up with the middle of the clubface. So your shot that is 2mm towards the toe relative to the center of the clubface would be something like 5mm towards the toe relative to the center of gravity. This would create a "gear effect" giving you draw spin even though your swing would normally have a very slight fade (starting to the right and moving farther right). Whether this could account for that severe of a draw though is hard to say, as I don't know. This article says that it can affect it about 20 yards. If you go into flightscope optimizer and set everything the same except put spin axis at 0, then the shot would go about 24 yards right. So you are looking at 32 yards left of where it is expected. More than 20 but not super crazy...Comment
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This shot was hit with a Cleveland 2 hybrid with no moveable weightsComment
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I would expect the ball to start right and draw back. It shows a draw spin of 885 to the left. 8 yards left wont be way off. What was the ball flight pattern in GC2?Comment
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Most likely because the GC2/HMT is not aligned properly to what the user thinks is straight. The spin calculation derived from the software measurement of the captured images isn't very picky about how the GC2 is aligned. The azimuth is and the launch angle is picky about how level the GC2 is to the hitting surface.Originally posted by andygg1986 View PostComment
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I would think that the measured club parameters should correspond to the measured ball parameters, regardless of whether the GC2/HMT is aligned properly to the target though because they are rigidly attached to one another. If the club data that is shown doesn't correlate with ball flight, I'm not sure how you would fix your swing with club data
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The bone of contention was the spin data vs path and face angle. While the spin is controlled by face angle, club path and launch angle, the way the spin is derived from the captured ball frames has little or nothing to do with those parameter measurements. They are measuring angular rotation of the ball in a specific time frame which has little or nothing to do with whatever the HMT measures for club head parameters. The long and short of it is align the GC2 and HMT properly to your target line or you may get some confusing results as most but not all numbers are referenced to the GC2 alignment axes.Originally posted by andygg1986 View Post
Align it properly and then you can really tell if the unit is providing correct/reasonable measurement results..Last edited by Ronsc1985; 10-17-2017, 09:54 PM.Comment
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I thought the GC2 was self-leveling, so don't understand the comment #9 above by Ronsc1985 "The azimuth is and the launch angle is picky about how level the GC2 is to the hitting surface."
What if the area you are hitting from isn't flat, say 2 degrees out of level? If this is an issue it would seem that a lot of attention should be directed to making sure the ball is being hit from a level surface. My hitting area is not perfectly level and I know driving ranges can have some slope for drainage purposes.Last edited by cspin; 10-17-2017, 10:00 PM.Comment
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Newer models have self leveling which do not need a tilt correction software run. Older models do not. The GC2 has a built in multi axis accelerometer which functions as a level indicator. These chips have an initial offset and long term drift, thus the need for initial calibration and possible periodic redo of the tilt calibration software. Supposedly the newer models do not need this, the older models certainly do. Quite a few people have "fixed" their units by running the software routine.Originally posted by cspin View PostComment
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Thanks for the response. What would be considered a newer model? And it still sounds like you should be hitting from a level surface to get useful readings...or somehow be able to do the math to account for a hitting surface that is known to be "x" degrees out of level. For example, if a hitting surface has an upward slope of 2 degrees...and the GC2 levels itself out...wouldn't you get launch readings that are 2 degrees higher than if the hitting surface were level?
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I appreciate all the comments. Paid a lot of money for this thing. Distance measurement is spot on this by the way. So basically when using gc2 outside don't use it with hmt and it won't drive me nuts. Just use it for distanceComment
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Also for all of u that own gc2 hmt and haven't tried it outside please do sometime and post your results please.Comment
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Can you post any more results or was that the only weird one.Originally posted by Golfnut7777 View PostComment
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