Syncing shot values between Protee software and gc2

[goatbarn]

I see what's going on...

All of those spin values for the length of carry are VERY low. 130 yard shot should be spinning some 8-10k rpms, and not 3.5k or anything under 5k.

It seems TGC's flight algorithm for short shots with low spin calculates a shorter carry than GC2's.

I'm not sure firmware will do anything for that.

Seems TGC's ball flight needs to be tweaked to better represent this scenario.

[Js1010]

Goat is right here - tgc algo for carry is ok on well struck (normal backspin ranges) shots but the algo definately has some holes in it on the more extreme backspin numbers. I did a lot of testing like ksman has done early on and was sending spreadsheets to protee with my findings between gc2 carry, optimal flight and tgc. They have adjusted carry in tgc to be more like optimal flight over time but there is still room for improvement.

Gc2 firmware has nothing to do with this.

[ks-man]

I'm not sure why my spin values are so low but I'm pretty sure it has to do with my swing. I typically get less carry and a lot of roll. I've noticed TGC doesn't translate that very well. I hit some sand wedges that carried about 80 yards with almost a launch angle of 40 degrees but only a back spin rate of around 1800. Not quite sure what I'm doing wrong with my swing that is leading to these types of numbers.

[Bruce]

1800 back spin with 40 degrees LA is not normal, unless you are hitting with a stick.

[ks-man]

1800 back spin with 40 degrees LA is not normal, unless you are hitting with a stick.

When you say "not normal" do you mean not really possible or something is wrong with my swing?

Here is a video of a sand wedge that had a launch angle of 42 degrees, backspin around 1700 and carried 77 yards. You can hear the audio from the GC2.

I guess I have an issue with one of the following ranked in order of likelihood:

1) My swing
2) My ball
3) My GC2

Any thoughts?

[Bruce]

You would expect 8000+ rpm backspin. Try a brand new white real golf ball first. You should see AT LEAST 4000+ backspin.

What sort of backspin are you getting with a 7 iron?

See here some PGA averages: http://blog.trackmangolf.com/trackma...ge-tour-stats/

[goatbarn]

I think it goes....your ball, your swing, your mat. And I wouldn't put GC2 on the list.

Have you had a low-ish handicap player come hit a few shots with a ProV?

I'd start there. Get someone that can hit a full wedge struck well. Need to prove to yourself its not the GC2. I'd like to see someone hit a full PW, with 9K spin and carry it 135+ yards or so. Then I'd rule out your GC2.

I don't think it's your GC2, but standing in your shoes I could see how you'd be doubting it.

[goatbarn]

Clean grooves. New ball. Clip it clean off the mat or don't even use the mat. Hit it off a piece of cardboard.

A full wedge should be giving you at least 6k, even if you're only hitting it 70 yards. Really, it should be more like 9k rpm.

[ks-man]

I posted this earlier in the thread which shows a number of shots from my 7-iron. The spin rate is typically 5000-6000 with my 7-iron. I'll try using a pro-v1. My grooves are clean since they're new clubs and never have been used outside. Unfortunately most of my friends are similar golfers to me (I'm a 16-18 depending on how much short game practice I get during the season). I have on friend who is a better golfer and I'll try getting him to come over to test it out. My sand wedge is different than my other clubs. I don't have the sand wedge in front of me but I know it is a new Callaway. I got all new clubs which I've been using with the simulator. The irons are 2015 Callaway XR. That will be what my p-wedge is. I think the spin numbers on the p-wedge has been higher (not high but not abnormally low). I'm wondering if I'm blading the sand wedge with a heavy downswing without realizing it. Not sure if I can really get the ball that high that way but I'm pretty much at a loss.

I really appreciate all the help you guys are giving me.

[Bruce]

If you're using the same ball, it does not make sense. 7-iron spin rates look good. You should see 8000+ rpm with your 40+ LA shots. Swing looks fine.

[ks-man]

If you're using the same ball, it does not make sense. 7-iron spin rates look good. You should see 8000+ rpm with your 40+ LA shots. Swing looks fine.

I do notice that sometimes the GC2 fails to register some shots with my sand wedge. This can happen on full shots or high pitch shots. I don't notice this on lower pitch shots or chips with my sand wedge. I don't think I've ever noticed this on a club other than my sand wedge. It maybe occurs 10-15% of the time but after it happens one time there is a good chance it will happen again on the next shot.

I do use the protective shield on my GC2. Could the shield have been cut poorly and be blocking part of the camera for higher launch angle shots? I can try taking it off but am a little nervous of a ricochet shot hitting the GC2.

[Bruce]

Removing the shield is worth trying !

[davray666]

Take of the shield and place some other protection in front of it that catches the bounce backs.
Can you send us a picture of your setup. Is the GC2 on the same height as your hitting surface and is it standing on a leveled surface. Primary concern would be if it's leaning forward a lot towards the ball.

[goatbarn]

What about the wait for spin thing...I don't know where to find that but I've heard it before?

[ks-man]

I was able to get a few shots in while I was home before I had to head back out (waiting for my car to be serviced). I need to do a lot more testing but I think one of the major problems was the golf balls I was using. I picked up these Wilson balls from Amazon. They are very cheap and I used them on the course and they seemed fine. I'm not sure if they always have terrible spin numbers or if they just don't hold up well after so many shots. I have two balls I've been using since I got my simulator a week and a half ago and they each have probably already been hit between 1000-2000 times over the last 10 days. I grabbed a ProV1 and was getting much higher spin numbers with my p-wedge and my s-wedge.

I have a lot of swing issues and am also getting used to the mat so I'm catching a number of balls very fat or else when I try to adjust then very thin. That has been causing the spin to plummet but typically I'm getting between 2000-5000 rpms more on the ProV1 than I was getting on the Wilsons when comparing similarly hit shots. I want to do a lot more testing and also try taking off the shield but assuming the issue is the ball I was using I had a couple of questions.

1) Do most people use ProV1s or other top tier golf balls for their home simulators?
2) How often should I replace balls I'm using at home (at the course a ball will get lost long before I wear it out).
3) Will better balls last longer (more hits) than a cheaper ball or it good practice to replace any ball after X number of shots.
4) These are the other golf balls from TaylorMade that I sometimes use on the course. Do you think they are better?

I have to imagine that balls at driving ranges or teaching facilities like Golftec don't replace their balls that frequently so I'm surprised that the Wilsons are wearing down so badly (assuming they were better when they were new). I know you don't get the same type of spin rates using range balls as ProV1s but I wouldn't expect a sand wedge to get below 2000 rpms for one ball vs. over 8000 or 9000 rpms with another. This is all pretty new to me though. Thanks.