Is my anti-skating too strong.


I’m trying to adjust the alignment of the Ortofon Black Quintet cartridge on my Music Hall mmf 9.3 turntable.  When I put the stylus down on the alignment protractor, the tone arm pulls to the outer edge of the turntable.   Should I disable anti skating when doing alignment or is it set too strong?  Obviously haven’t done this too often.
Also, when listening to the anti skating track on The Ultimate Analogue Test LP, there is noticeable distortion at the end of the track which indicates too much or too little anti skating.  Any guidance here?
udog
MC, It's a matter of vector algebra, adding the various force vectors results in a net side force that can only pull the stylus toward the spindle (in the case of an overhung tonearm), because the stiffness of the arm wand prevents movement in the actual direction of the major net force, which is toward an ever-moving point that is always pointed to the rear but to the inside of the pivot (with a pivoted, overhung tonearm).  With an underhung tonearm, the direction of the side force actually changes from pulling the tonearm inward to pushing it outward, after the stylus passes through its single null point, where there momentarily is zero skating force.
"Each and every point on a circle is the same distance from the center. Therefore the vector pointing towards the center is zero."  It's not that the two statements are wrong.  It is that the two statements have nothing to do with each other.  Moreover, an LP groove is actually spiraling toward the spindle or the label, so each and every point is NOT the same distance from the center.  And there is a net vector force toward the spindle; we call it the skating force. (I know we agree on that, but you seem to lose sight of it once in a while.)

The ball on a string goes off into space on a straight line tangent to its circular orbit, when you let go, because you were applying a force that kept it circling, until you let go of the string.  That is called a centripetal force.  Because as Newton tells us, "every object persists in its state of rest or uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it".  
You wrote, "The motion of each point on the circle breaks down into a vector that is pointed straight ahead, ie tangentially, and straight towards the center. Each and every point on a circle is the same distance from the center. Therefore the vector pointing towards the center is zero."  What?

The reason why overhung tonearms can never have zero skating force can be shown by the Pythagorean Theorem.  As you say, tangency to the groove is what we are talking about, but we need tangency to the groove where the friction force generated at the stylus tip has a vector that passes back through the pivot point. Then and only then do we have zero skating force. Consider an underhung tonearm with no headshell offset angle that can achieve zero skating force at its single null point.  In that one moment, the distance from the pivot through the tonearm/cartridge is one side of a right angle triangle (side a).  The distance from the stylus tip to the spindle is another side of a right angle triangle (side b).  And the pivot to spindle distance would be the hypotenuse of the right angle triangle, side c.  Pythagorus told us that for any right angle triangle, c-squared = a-squared + b-squared.  But if you have an overhung stylus, side a (tonearm effective length) is always larger than side c (P2S).  So you can never achieve even a null point, let alone zero skating force, with an overhung tonearm, UNLESS you invoke a headshell offset angle.  The founding fathers of cartridge alignment handed down to us a headshell offset angle, so as to achieve two null points across the surface of an LP.  But they didn't give us any condition that satisfies what we need for zero skating force, because headshell offset per se causes a skating force.
lewm-
MC, It's a matter of vector algebra, adding the various force vectors results in a net side force that can only pull the stylus toward the spindle
 
Finally. Took long enough. Thank you. 
MC listen before he buys ? surely, you must be joking...Mr. F ( who would have no trouble with the math, nor the egotist )


but let’s check in with the OP, did anyone here help you ????????
Excellent Lewm. Nothing to add to that explanation.

@dover , I looked into it and you are right about the Eminent Tech vs Walker. I had always assumed Walker was first. Assumptions are the mother of all f--- ups. Thank you for correcting me.

However, you can not uncouple effective mass. If it is attached to the tonearm the tonearm must move it. You can change it's resonance characteristics but you can not write it off as mass. A tonearm must move in two directions and only in two directions, vertically and horizontally. Pivoted arms have about the same distribution of mass in both directions. There is usually a little more horizontal mass in the form of the bearing housing which is good it breaks up the resonance peak a little so with a specific cartridge the horizontal resonance point might be 8 Hz and the vertical 10 Hz. Now looking at your air bearing arm, the vertical effective mass is quite similar to a pivoted arm. Most of the mass is at the axis of the vertical pivot which means it contributes very little to the effective mass. The more the a mass is out by the cartridge the more it contributes to the effective mass. The cartridge is literally one to one. If it weights 10 grams then 10 grams is added to the effective mass. If one were to mount the cartridge at the vertical pivot (a bit weird but for the sake of argument) it would only add perhaps one gram to the effective mass. In the horizontal direction we now run in to the big problem. The entire tonearm has to move the same distance. A mass at the back of the arm contributes 1 to1 to the effective mass. If the arm weights 150 gm then the effective mass in the horizontal direction is 150 gm. If a pivoted arm weights 150 grams the effective mass would only be perhaps 20 gm. So now with the same cartridge whose vertical resonance was around 9 Hz it's horizontal resonance is 2 Hz or worse. You can see the oscillation on an oscilloscope. With a higher compliance cartridge you can frequently see it with the naked eye. You are depending on the stylus/cantilever/cartridge to move the arm. Anything that aggravates that resonance point will start the cantilever oscillating side to side. You can add viscous damping but then you increase the work required for the record to move the arm and you increase record wear. This is the problem the Reed 5T and the Schroder LT are circumnavigating. Very successfully I might add. This makes them hallmark products I believe as they dispose of tracking error but still interface with the cartridge correctly.