Do 45 RPM records need higher anti-skate setting?

@ Ralph: You ask "Also, if the platter is at rest there will be no skating force at all. That was the basis for my response above; are you saying there is zero(0) change regardless of rotational speed?"

Answer: The difference in the rest condition and the dynamic condition are not relative to each other. Skating force is the result of dynamic friction, which requires movement. So the rest condition is irrelevant. One cannot extrapolate changes due to increases in relative velocity based on the change from no velocity to some velocity. The comparison between the no velocity condition and some specific positive velocity condition is a non-sequitur. That would be the case even if dynamic friction magnitude were dependent upon velocity. Fact is dynamic friction is nearly independent upon velocity.

Going to try to be bowing out from the forums now guys. I see that they are addictive to me! Wow, it takes a lot of time to try to be clear, and I have my real job, research and design to do.

Try to remember, when you think you know it all start looking for your mistakes! You'll find them.

Omie, What do you research and what do you design? Inquiring minds want to know.

Zavato,

Just noticed this.
Your mistracking is most likely caused by the 45 presenting the cartridge with the problem of tracking a groove which makes the stylus accelerate at a greater rate. This puts it at the edge of its tracking envelope, therefore the influence of the skating force (which is always present in a pivoted arm) more apparent, resulting in distortion on one channel.

Normally, with insufficient anti-skate, the VTF is enough to cope with most groove modulation. When there is more energy in the system, that is not the case and shows up the imbalance in downforce on each face of the groove, which anti-skate is designed to compensate.

Omsed,
you said

when you think you know it all start looking for your mistakes!

Have a look a R.J Gilson's paper in Wireless World Oct 1981 for some more reasons why you might wish to increase antiskate disproportionately as the arm approaches the inner grooves. Also, watch you don't fall into the trap of regarding anti-skate as a setting governed by a "I can't hear a difference with anti-skate, so why bother using it" attitude.

As an aside, regarding 45rpm records, if we had been talking about 7" singles rather than 12" LPs, that is another thing altogether. (see my blog
for more on this and on anti-skate generally.)

Plain wrong statement: "45 presenting the cartridge with the problem of tracking a groove which makes the stylus accelerate at a greater rate"

This greater acceleration does not exist. And more energy is NOT being put into the system or the volume would be louder on a 45!

This poster is confusion lateral and vertical groove velocity with linear groove velocity.

In reality, for the same lateral or vertical velocity (the signal-generating directions) the angles on the groove are more gentle, as the same displacement of the stylus in the vertical and lateral directions happen over a greater (linear) length of the record groove.