GC2 Giving incorrect spin rates on high lofted clubs

[jtraskal12]

Hi all,

curious if anyone has any info to help me out. bought a used GC2 and have noticed that the unit is providing inconsistent spin rates with high lofted clubs (wedges 9iron 8iron). The ball flight seems like its coming out right but the unit is giving spin numbers that are nearly half of what they should be (example PW 3500-4500 on a flush shot) and the spin actually goes up and closer to realistic numbers on thin shots (8000-9000). The unit seems to be giving correct spin for 4,5,6 irons (5500-6500 for 6 iron). Also the carry numbers seem to be about 10-15 yards short even with the longer irons with the correct spin numbers.

currently using a Country Club Elite mat. Tried hitting off a tee with same results, also tried an older different brand golf mat we have same results.

curious if anyone can give any tips on things to try to maybe resolve this issue. thanks

[Wizard of Coz]

What golf ball are you using?

[jtraskal12]

tried pro v1, pro v1x, and a brand new srixon qstar tour

[intrinsic]

Clean the grooves of your clubs and make sure you're using a brand new golf ball

[jtraskal12]

grooves on the clubs were clean and ball was like new srixon qstar tour for most shots. Its weird that the spin is correct for lower launching shots but once the launch angle starts increasing it drops the spin dramatically.

[andygg1986]

Can you take the GC2 outside and hit off some grass? With really dense/hard mats like CCE, if you are hitting just a tiny bit behind the ball, the club is actually going to bounce up and into the ball giving you a positive angle of attack. So with a wedge, instead of hitting down 8*, you are effectively hitting up 8* which will give way less spin. Since your thin shots are giving more reasonable spin numbers and longer clubs with a shallower angle of attack seem reasonable, I think this is what is happening.

Wedges can also get a thin film from the golf ball after a while if you hit lots of shots inside. Scrubbing with a brush and some water may help remove that.

[andygg1986]

It could help, although you could still manage to bounce a wedge up into a ball sitting on a tee. Maybe in addition to using a tee, try putting something just barely behind the tee like a piece of paper. That way, if the wedge hits the mat before the tee, the paper would get wrinkled.

[jtraskal12]

Okay thanks for the suggestions, Do you think the low spin readings will greatly throw off the distance readings as well? or is the distance of the shot coming out how it should?

[andygg1986]

Low spin on a wedge will make it go farther. Essentially you are getting a flyer like out of the rough. However, CCE is extremely penalizing on swing speed if you hit it even a tiny bit fat. The fibers are just so dense that they slow the club down. So the net effect could still be a loss of distance assuming speed drops more than the gain by less spin. Also, pretty much everyone who is new to swinging inside sees lower distances than they expect. It can be a combination of not feeling totally comfortable swinging full speed inside and not knowing the distances that you actually hit the ball. The GC2 screen shows carry distance, whereas most people think about their clubs' total distance including roll. Plus, there is usually a skewed perception towards your longest shots rather than average.

[Truok]

Few things I can think of Is the device level with the hitting surface?
HOw old is the device? Could potentially be a flash module failing.
Dirty club or ball.
Cheap ball. Certain balls like a range ball for example will spin similar to premium balls with a low to mid iron but not spin hardly at all with wedges. I've tested some range balls that spin as low as 4000 rpm with a full swing lob wedge and launch angle is crazy high cause the ball just runs up the face.

[A.West]

I agree with Andygg's diagnosis. Hitting off mats stink in general. I started with a CC Elite mat and it forced me to be a picker. Hitting it fat on the mat takes off spin. I found the CCE eventually quite painful to my wrist as well. To protect my wrist I started playing off a tee and used a more sweeping rather than downward swing. Not good for playing real-life golf! I eventually moved to a Truestrike to avoid the repetitive stress injury, but it also lets me get away with hitting mat before the ball which cuts spin roughly in half. To get better at playing real golf I take my GC2 to the range because my biggest focus is on getting ball-first contact. With HMT the downward angle of attack data is the tell. Without the HMT high ball spin would tell me I made downward ball first contact.
But it could also be an old flash that simply cannot keep up with the highest-spinning shots.
When you hit off the tee are you still hitting with a downward angle of attack?

[JackedUpSwing]

High launch and low spins are tell-tale signs of low friction. Either the ball your using isnt good, the clubface is dirty or there is something(matt fibers from hitting fat) getting in between the clubface and the ball.

If the ball doesnt have good friction against the face, the ball will skid up the face and launch higher with less spin.

So make sure you scrub your club face really well. Keep in mind, just cause your not using the clubs outside doesnt mean they dont have shit on the face. Balls with soft covers will leave shredded pieces of cover on the face which will greatly reduce friction.

[Dax]

Plus dust from the hitting matt getting on the club face.

[jtraskal12]

Thank you guys for the info. It turns out I believe the issue was that with wedges and up to about 9 iron it is super important as you guys said to clean the face regularly. When the ball leaves residue on the face after repeated use it drastically reduces the spin reading of the GC2, currently cleaning the face after every 5 shots or so and seems to be working much better