To Pin UP, or to PIN Down, That is the Question

[striker12]

thanks striker!! Let us know your thoughts!!! NICE shooting,,, 8 stirkes,,,, soon a 300!!! I can feel it,,,, how about you striker!!!!! (

i can feel it but my 8 strikes was the back 8 i went open/spare/spare/open but the open in the 4th was a split but i just had to focus more on my thumb getting out of the ball and not grabbing i grab for a second on the bottom of my swing and need to stop doing that.

[RobLV1]

The way the ball is laid out is no more than how the core is positioned within the ball in relation to the bowlers Positive Axis Point (PAP), which is the initial axis that the ball is rotating around based on the release of the bowler. Personally, I think that the whole concept would be easier to understand if the name was changed to "Personal Axis Point." Doing this would eliminate the habit that some bowlers have of looking at the pin position on another bowlers ball and thinking that they will get the same reaction by using the same pin position themselves. What they don't understand is that if their PAP is different, then the reaction that they will see will also be different.

Anyway, the low rg, differential, and intermediate differential (on asymmetrical balls), that is provided by the manufacturer is for an undrilled ball. Once the ball is drilled, the actual numbers change. The way the core is positioned within the ball also determines the path of the axis migration. The axis migration is the change in the axis around which the ball rotates from the primary axis created by the bowlers release (PAP) to the axis around which the core is designed to spin. The placement of the pin in relation to the holes drilled into the ball determines the direction of the migration, and the direction of the migration determines the shape of the balls reaction. While there are several factors involved in planning the direction of the migration, one of them is the placement of the pin in relation to the finger holes. Pin-up balls tend to migrate in an upward direction that produces a more angular reaction (hockey stick shape), while pin-down balls tend to migrate in a downward direction that produces a smoother, more arcing reaction (bananna shape). What kind of layout works the best for a particular bowler depends on several factors including his bowling style, the particular lane condition on which he bowls, and the part of the lane that he prefers to play.

Rob Mautner

[MICHAEL]

If you have two different types of drillings, Standard finger tip, and Tri-Grip, do these different grips change the axis of rotation![/COLOR]

so when I get my new Byte , to determine the axis rotation, do I need to have it figured out on ONE or the OTHER?

Does it change depending on the grip layout?

[RobLV1]

I'm really not familiar with the Tri-Grip. The next time I talk to Bill I'll ask him about it.

[got_a_300]

Here is a pic of the Storm Reign On ball that I laid out
and drilled with the RICO layout.

[tccstudent]

Here is a pic of the Storm Reign On ball that I laid out
and drilled with the RICO layout.

I thought the RICO was supposed to be at a 45 degree angle that picture shows a much higher angle.

[bowl1820]

I thought the RICO was supposed to be at a 45 degree angle that picture shows a much higher angle.

It would depend on where his PAP is.

the pin is put in the center of the grip, with the CG 45 degrees from your PAP. (Symmetrical ball)

In an asymmetrical core ball, the pin is put in the center of grip, with the PSA (or mass bias) 45 degrees from your PAP.

Given the PAP measurements given of 4 1/2" over 1" up.

That does look higher, I'd say closer to 90 degrees.

http://www.brunsnick.com/rico_ball_layout.html

[got_a_300]

No it is lower than 45 degrees that is the way I
wanted to drill it for the way our lanes play at our
center I think if I remember correctly the CG is at
or around the 15-20 degree mark.

It works perfectly on our lanes but may not work
worth a flip on another centers lanes as I haven't
had the time to try it anywhere else yet.

[bowl1820]

No it is lower than 45 degrees that is the way I
wanted to drill it for the way our lanes play at our
center I think if I remember correctly the CG is at
or around the 15-20 degree mark.

It works perfectly on our lanes but may not work
worth a flip on another centers lanes as I haven't
had the time to try it anywhere else yet.

15-20 degrees looks about right if you measure the angle from the grip centerline.

But the drill angle is measured from the lines drawn from the pin to the cg and the pin to pap

Either way it's not technically a true Rico layout. Because Rico is based on a 45* drill angle

[RobLV1]

Just a quick thought: based on the original question of pin up or pin down, what happened to pin in the middle? According to the Storm VLS System, 4 X 4 X 2 will give you a smooth but strong reaction. The majority of balls in my own arsenal are drilled with the pin neither up, nor down, but in a strong, smooth position for maximum flare and maximum forgiveness. Why doesn't this seem to be an option for anyone else?