Oh no, bad draw bias on my new GC2

[Jay28]

So over the past 2 weeks my sim has been up (still a couple of things to finish) but the projector is up, unit aligned and screen and surround up, so I thought I would test the GC2 out over the past few days. A bit of background, my shot for 20 years of playing has been a slight pull fade, quite minor when I strike it well. Sometimes, I will block a horrible one out to the right.

On GC2 90% of shots are a severe hook, up to 100 yards left of target, but usually in the 30-40 yard range....had one today with 6000 spin left!!!. On strikes where I know I have hit the ball really well, it will hook really badly. I wasn't sure if this was an indoor thing - I am hitting offset to the screen to the right so I thought maybe the alignment might be throwing things off, but have tried everything, even trying to purposely wipe across the ball. Same thing, mostly a hook.

I went out this morning to the range, though didn't take the GC2 as I had a few other errands and didn't want to leave it in the car (will do that tomorrow). All my shots were as normal, a slight pull to the left with a fade.
I guess the acid test will be tomorrow with the GC2, but right now I have little confidence in the unit.

I also tried raising the unit about 7/8 inch above the ball level, no difference.
Guess I will learn more tomorrow, but it's really really odd for me to such massive hooks - never ever happened on the range or the course in 20 years.

I've seen some talk of this draw bias, with some even saying, yes it does have bias indoors after a lot of testing. The problem is that I set up my sim purely for practice, not really playing courses. I feel as though this will actually be worse for my swing than less regular practice outdoors- ending up fighting an imaginary hook and then when playing on an actual course all those bad habits fixing a sim situation will be detrimental.

Is it just a case of having to live with it?

[bm11]

Definitely bring it to the range with you. Weird things happen with your swing inside, I wouldn't be surprised at all if it shows you data accurately outside.

[Jay28]

It wasn't a wedge, it was a 7 iron.
I think I have a bad unit. Tried again just now... 7 iron, strong loft, 10800 backspin, 5800 left spin. Both impossible.
Will try it out at the range tomorrow. If the same, will be looking for a new launch monitor..

[JackedUpSwing]

Maybe the flash is going bad.

[Jay28]

It's a brand new unit bought directly from Foresight Sports.

[andygg1986]

Make sure it is open all the way and that the foot in front is down. Also try tilting the screen up. I have heard of people who have weird reflections off the screen that interfere with the camera.

[Dax]

I would take it to the trance and see if you get a similar result. Might need to send it back to factory and it is brand new. Something could be out of alignment. However and to be honest my first thought when reading the heading was indoor swing and this is why I suggest taking it to the range first.

good luck

[AdamV]

A decent amount of spin on any iron shot will be 600-700 rpm, if you’re getting 1000’s then you’ve got a fault or calibration issue.

The spin bias people talk about is noticeable (for some) but not that dramatic.

[Jay28]

A decent amount of spin on any iron shot will be 600-700 rpm, if you’re getting 1000’s then you’ve got a fault or calibration issue.

The spin bias people talk about is noticeable (for some) but not that dramatic.

I'd be happy with a decent amount of spin
Right now it's in the 1000's.

So I have been to the range. There is a left bias for sure but it is MUCH smaller than I am seeing inside.
My slight fade outdoors is showing up fairly straight on GC2, sometimes a tiny draw. It's not enough to hinder simulation or practice though. Big slices and big hooks are showing up as they should.
I took a look at some of the videos of my indoor swing and I can see what I am doing. I have plenty of room to swing, but it must be a sub-conscience thing that is causing me to limit the follow through and release early. Getting very handsy at impact when indoors, with left wrist breaking down. Club is turning over horribly at impact.

I'd obviously prefer there to be no bias, but will see how it goes. I guess the important thing for practice is to NOT try and fix the draw bias and for simulation to just play with it. If it gets to be too much of a pain after I have fixed my obvious indoor swing issue then I will go a different route - maybe Uneekor eye xo depending of course on how that unit pans out in reviews with measuring spin..

[FaultyClubs]

I've used several gc2 at the range and never saw a draw bias on any of them. If you do then you should talk to foresight and get it sorted out.

[frodaddy00]

Indoor swing is a real thing. Do you have plenty of room to swing? Nothing hindering no only height but also to your sides especially behind your back for the following through?

Also it could be the mat.. perhaps your club face is getting shut and causing hooks?

Lastly you need to play with your GC2 alignment.. set it up to your target line and practice a few punch shots to make sure the ball is heading the direction you expect. Adjust unit as needed.

[Jay28]

Indoor swing is a real thing. Do you have plenty of room to swing? Nothing hindering no only height but also to your sides especially behind your back for the following through?

Also it could be the mat.. perhaps your club face is getting shut and causing hooks?

Lastly you need to play with your GC2 alignment.. set it up to your target line and practice a few punch shots to make sure the ball is heading the direction you expect. Adjust unit as needed.

Yeah, for sure. I already did notice I was not completing my follow-through properly. I do have plenty of space, no worries above or at sides... it must still play on the mind though!
Mat seems ok - I take very shallow divots with my swing and there does not seem to be any resistance when I hit it well. The odd fat shots do get punished with pull hooks though. I expect that and don't mind so much.
On the alignment - will that effect spin of just horizontal launch?

[Indodom]

What I have have noticed with my own game is if out doors; I line up with an intermediate target so basically in line with target, indoors with the screen so close and to see the whole screen inadvertently I am left, my feet may be straight to target but then knees hips chest shoulders head(brain) are left. Indoors is real, even if you do have enough room.

[3on3putt]

What I have have noticed with my own game is if out doors; I line up with an intermediate target so basically in line with target, indoors with the screen so close and to see the whole screen inadvertently I am left, my feet may be straight to target but then knees hips chest shoulders head(brain) are left. Indoors is real, even if you do have enough room.

I do not have a GC2 (Skytrak) but totally agree with this point. I recently painted a short white line on the front edge of my hitting mat to give me an intermediate target (I use the same approach as you when playing outdoors). It gives me a spot on the ground to square my clubface to at address and then allows me to set my feet and shoulders accordingly. It's made a big difference. I was having a pretty serious case of the lefts at times on the Skytrak and I think it was all related to alignment. Having that intermediate target made a big difference.

[Scottygolf]

May I suggest having a friend who is a scratch golf take a few swings. On my GC2 one of my buddies who is scratch was hooking everything he hit, claiming he did not hook one ball outside the day earlier. Our pro was over and stepped in and stripped 10 irons down the center with his natural baby draw at about 50-100 rpm left. We all smiled and looked at our friend and said the machine is fine.

I do find more of my misses are draw's then fades. I do believe some of us have a inside swing vs. outside swing that sways the numbers left a bit. Then the wife hits and everything goes right.

[mthunt]

I think it’s a swing inside thing too. Maybe alignment. I draw more inside. I’ve taken my GC2 to the range and the draw is gone.

[Jay28]

It definitely is an inside swing thing. For some reason I thought I would be immune
Got to be careful not to pick up bad habits.
As well as what I mentioned before - not completing the follow-through (I assume some subconscious fear of hitting something) - some old habits have come back that I had when I started playing. Namely hitting at the ball... i.e. I am releasing the club WAY too early causing massive hooks.
It must just be that "don't smash anything!" thought in the mind that I am not aware of.
Anyway, it is getting much better now I know what I have been doing. Startline seems correct and sidespin is reasonable.