Pretty much from what I've read, the terms "Axis Balance" and "Axis Weight" are just used interchangeably in referring to "Pin on Axis" layouts.
Here's a example from a old bowling glossary pin on axis is called Axis Balance in it:
Axis Balance
- The PIN of the bowling ball is positioned on the bowler’s axis point
(PAP) with re-spect to the initial rolling track of the ball.
Bowlingball.com calls the same thing Axis Weight:
"Axis weight has the Pin located on or near the bowler's PAP."
or in the bowling chat wiki:
Axis weight: Method of drilling in which the weight block is positioned so that its mass is evenly distributed around the axis of rotation. (aka: pin on the axis)
As for The "Pin on track" layout it is only called the "Modern Axis Balance" (or PSA Balance) by PhoenixBB,any place else it's mentioned it's just called "pin on track"
Phoenix Ball Balancing own info
looking at the trial vers. of the Compubalance software. they have help file that tells you everything about their stuff.
They define Pin on PAP as "Axis Balance"
They define Pin on Track As "PSA Balance" (for Asym's) "Modern Axis Balance" (for Sym's)
From the PBB help file:
Axis Balance defined
Drilling Option 1:
Computer Calculates Axis Weight and Axis Balance
We define axis weight as the situation that arises when the vector that equals the sum of the static weights of a ball has the same direction as the vector from the geometric center of the ball to the PAP of the ball. A simpler definition is to say that a ball has axis weight if the CG of the ball, after drilling, is on the same line that contains the center of the ball and the PAP. When the CG is between the center of the ball and the PAP, gravity will pull the CG in such a way as to increase the hook of the ball. When the center of the ball is between the CG and the PAP, gravity will pull the ball in such a way as to reduce the amount of hook of the ball. Important: The PAP is on the surface of the ball, but the CG is very near the geometric center of the ball. In fact, when side weight = 0, finger weight = 0, and top weight = 0, the CG is exactly at the center of the ball. Thinking of the CG as a mark on the surface of the ball will lead you to a misinterpretation of the above discussion.
We define axis balance as the situation that arises when a ball has axis weight AND the axis of symmetry of the core of the ball is the same line that contains the center of the ball and the PAP. (
Visually, the pin will lie at the PAP, and the CG mark on the ball will lie between the pin/PAP and the center of grip.)
Therefore, it is possible to have axis weight without axis balance, but it is not possible to have axis balance without axis weight. Notice also that axis balance requires a symmetric core (since a line of symmetry is required).
If you want a ball with an asymmetric core to roll predictably and consistently, use
PSA Balance. If the ball that you are drilling has an asymmetric core, the PSA Balance option will be enabled if you choose axis balance (Option #1). If PSA Balance is used on a ball, the ball will not ‘flip’, but rather, it will roll in a dependable arc. (It will still hit hard!)
Visually, the Mass Bias point is located at the PAP for a ball drilled for PSA Balance.
screenshot
axis balance defined.JPG
Axis weight-Axis Balance
axisweightaxisbalance.JPG
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