Reed 2G magnetic antiskate

"yes, the forward one attracts, the rear one repels"

that does not make sense to me,

the anti-skate force once set, should remain constant throughout the full arc of the armwand.

as the arm is pivoting, those two round elements change their position relative to the ’fixed location’ of the end of the adjuster (which is moved closer or further away within the threaded shaft).

how does this work? I'm having a hard time visualizing the shifting attract/repel forces, as they occur/shift within the arc.

I suppose attraction in front of the pivot pulls outward for a while, and repulsion behind the pivot could also maintain an outward force.

how to keep it regulated, some brainiac was involved, that's not me!

Skating forces are max on the outer LP, and decrease

as the arm tracks inward. I will presume the designer/engineer figured out

how to create  varying antiskating force by the placement of these magnets. 
They should know how to do this better than me….

For AS devices that are not simply a weight on a string, they use either a spring or magnets. Both magnetic and spring force vary with distance between the surfaces affected. So I have always wondered how they’re designed. Absent the information, it’s possible that the AS force in both cases is changing as the arm traverses the LP, because distance is changing. But it would be in a linear fashion or a mathematical fashion at least. Whereas the skating force is only partly predictable.

jw944ts OP

"Skating forces are max on the outer LP, and decrease"

The dude at WAM (WallyTools) says it is a Parabola, i.e.

Highest Inward Skate at the Outer Edge; 

Lowers as it goes near 90mm radius

Increases again as it moves closer to the center

It’s your fault that I watched a lot of his videos this am. I met this dude at the NY Audio Show recently.

https://www.youtube.com/watch?v=5mAK8f2g0x4

when there, top right, click 'from wally tools'

He sums it up, Anti-Skate, what we can do is "At Best An Approximation"

.......................................

He recaps the advantages when all is done right:

"will sound much more relaxed; non-mechanical sounding; Improved Imaging and Sound Staging come into better focus; overall clarity will improve; sibilancy will often decrease; chances of hearing mis-tracking will be near zero"

Yep. It's a parabola of sorts.  And if AS is virtually constant, it can be represented as a straight horizontal line on a graph of distance across the LP surface vs force (AS vs Skating on the same graph).  So you can visualize that a straight line can only intersect a parabola at two points on the curve. Like a stopped clock, AS can only be precisely correct for two instances in the course of playing a record. Why I stopped fretting.