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
All i can say is that your table needs further refining if you have the stylus moving during alignment and distortion on tracks from test albums but yes disengage anti skate for aligning and make sure the table is level when you align.
@feldman4     I have too many MFSLs to check.  But look for 45rpm classical symphonies presented on four discs and issued around 2005. Typically, each movement is presented on one side, so the other four sides are empty.  Given the pricing effect, I don't know what is the advantage of doing that since the record needs to be pressed in just the same way, creating just the same conditions as in a disc modulated on both sides.  Perhaps they felt there is advantage in never having to put the modulated side against the TT mat.  They don't seem to do it now.
Or if you don't mind getting drawn in, you could phone them; they are very helpful.

@mijostyn     Did you ever hear an Aeroarm?  There are only about 4 loose in the whole world!  If not, please pipe down and stay piped down.

Obviously a disc pressed off-centre is faulty (many of them I agree) and will not play to best advantage, but the lateral oscillation will be exactly the same when played with pivoted and parallel arms and will have precisely the same effect on the cantilever, located as it is very close to tangential to the groove.  Surely that is simple enough.

And why do you say the anti-skating must be 10% of TF.  As @justmetoo points out, the requirement will vary according to stylus profile.

@justmetoo     The reason Shibata and Line Contact stylii need more anti-skating is that their extreme eliptical narrow profile lateral sides create more friction with the groove walls compared with, say, a spherical stylus, the other extreme.  The contact area is far less so a like downforce creates more friction.  Such stylii typically feature on moving coil cartridges and need to run at greater tracking forces, typically 2.5g or more compared with a MM that can go down below 1.0g.

But 2.3g of anti-skating is waaayyy too much.  You are damaging your records and stylus as well as getting bad sound.  @jmijostyn is overdogmatic like many here, but about on the money.  Turn it back and listen for less distortion and better channel balance.

@mc    When did you measure the friction in the groove and on an unmodulated side?
There is a very interesting method for setting anti-skating force on the website of Vacuum State Electronics. It was written by the late Allen Wright, a highly talented electronics designer and expert on all things analogue:

http://www.vacuumstate.com/fileupload/GuruSetUp.pdf
(for the advice on anti-skating, see page 2 of the document that opens)

Allen recommends using the music grooves of a normal record, not a blank disc. And he recommends identifying the correct anti-skating force by ear. His method is, I think, well worth following.
The central idea put forward by Allen is that adjusting for optimal anti-skating force involves proceeding by small increments - which at first may produce no audible effect (his advice is to concentrate your attention on the right channel, listening particularly for maximum microdynamics).
As one approaches the range of correct settings, there will suddenly be a very noticeable improvement in the right channel (in other words, anti-skating setting follows a very shallow curve and then suddenly switches to a very steep curve - see Allen’s representation of this in ‘Pix 3' on the webpage).
So, I wonder whether anyone has any comments on this, based on their experience.
There is a further interesting point that Allen makes: once you reach - by small increments - the point where the right channel is performing as well as the left channel, you can then go on and apply further small increments, and the effect will be to produce further improvement in both channels. If you then proceed beyond this point - with one increment too much - there will be a sudden audible worsening - a collapse of the microdynamics - in both channels. In other words, once you exceed the optimal anti-skating force, there is a sudden, precipitate fall-off in performance.
Does anybody’s experience of setting anti-skating force confirm Allen’s account?
Peter

@pgtaylor 
Yes - I triangulate the three methods.

Step 1 - I use Soundsmith's technique of setting by dropping the stylus between the inner grooves in the run off and doing an initial set.
Step 2 - I then use the Allen Wright method, running up from low to high antiskate. There is a sweet spot where the sound is most natural.
Step 3 - I check the cantilever to make sure it is straight. You can also use an eccentric record to check if the cantilever shifts more to one side than the other.

Allen Wrights methodology is much easier to perform if the VTA is dialled in accurately, because that with the correct antiskate gives you maximum ease and naturalness of sound, the most harmonically complete.

Using rules like x% of tracking force is wrong because you dont know the compliance in the horizontal plain, it can be quite different to the vertical compliance specified.


Clearthinker, will an airplane fly without wings? No, I do not have to hear one. All I have to do is look at it. Every tonearm must deal with the laws of physics even if you do not understand them. Bow Wow. (dog barking). I think you might want to consider changing your user name. I'll change mine to "dogmatic" 

@justmetoo, friction is much lower in the record groove than it is on a blank record. This is counter intuitive but lets see if I can explain it so it makes sense. The major determinant of friction in a record groove is VTF. Next is the surface area contact. The greater the surface contact the lower the friction. What will have greater friction, the point of a knife or a marble. 
In the groove the stylus has two contact points and distributes the VTF between the two. On the surface of a blank disc there is only one contact point and the full VTF bears on it, the point of a knife. At the same VTF line contact styli will have less friction than elliptical styli. This is why line contact styli can get away with higher VTFs without increasing record wear. Yes, modulation plays a role but minor in comparison to contact pressure. In the groove the contact pressure is 1/2 that on a blank disc.