Do 45 RPM records need higher anti-skate setting?

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.

Just read the antiskate blog. There is no centripetal force in any part of the system. The guy is taking the facts that the record rotates, that an arm is on the record, and falsely extrapolating the conclusion that there is centripetal force. Does not exist in this system.

Could not find the Gilson papers, if someone wants to give a link I'll read them.

Dear Omsed,
The question was around the two terms "centrifugal" and "centripetal". I was pointing out that in Newtonian terms there is no such thing as centrifugal force, that the force holding a body in circular orbit around an origin is centripetal (center-seeking, not center-fleeing). I cannot recall my exact words, nor do I wish to search for them, but I had no intention of implying that there is centripetal force involved in skating, if that's what you mean here.

I still would like a clue about your credentials in the audio/engineering business, just because you sound like an interesting and experienced person from whom we can learn.