# String and weight anti-skate geometry?

First of all, I am not having any problems with playback but would like to educate myself a little on this subject. Please, no debate on whether I should or not use anti-skate.

My questions deal with with the geometry of the monofilament line to the guide pulley and what they ideally should be set at. SME, for example, states that after deciding what setting you want to use for anti-skate, you should position the guide pulley so that the monofilament is at a 90 degree angle to the anti-skate lever (or tonearm) at the outer groove of a record. I am assuming that the force is highest at a 90 degree angle, and as the angle decreases while playing a record ending up at maybe a 45 degree angle at the inner grooves, there should be less force applied.

Questions:

Is what SME states the best way to set up the geometry, monofilament at a 90 degree angle to the tonearm? What would be the theoretical result of setting it at say, 90 degrees to the tonearm at a third or halfway into the record?

Again, assuming that force is greatest at a 90 degree angle, would force decrease significantly at a 45 degree angle or would it only decrease slightly, if at all?

Thank you very much for your help.
bumboola
2 responses
 03-18-2013 4:07amHey this is a great subject. I don't use a tone arm as good as a SME. But my Harmon kardon t65c has a similar set up with the pulley and microfiliment. I too would like to know the answer. And would it make a difference to listening or possibly stylus wear?Thank you for the question and thread. 03-23-2013 9:23pmThe arrangement that is mentioned on the SME instructions means that the anti-skate reduces by around 20% at the inner groove. If you alter the position of the pulley, you can make it increase rather than reduce, which is what most arms do, by having the thread at 90 degrees at the inner groove. Or you can make it increase and then reduce by having it some way in between...The main thing is that you have some antiskate. If you can't hear any difference with or without, then the logical default is to use your arm with anti-skate, as it equalises the forces on each side of the groove..