Stylus shape and skating force


I've been owning a new Ortofon 2M Bronze for few days, and I owned an Ortofon 530 Mk II. Plus, I had the chance to try a couple of Clearaudio's (Beta and Virtuoso) and another bunch of entry level cartridges.
The latest have elliptical stili, while both the Ortofons have fine-line stili.
My turntable is a Clearaudio Emotion with Satisfy toneram (sapphire/ceramic bearings and magnetic antiskating).

The thing is: while Ortofon's fine-line stylus retrieves a higher level of details and keeps distortion to a minimum it appears to have a strange behavior.
A conical or elliptical stylus, when placed on a blank record (or at the beginning, in the lead-in area), behaves predictably: it just sits there floating in and out according to the antiskaing settings.

My Ortofon's, instead, literally "flies" towards the spindle, no matter how much antiskating I set. In fact, I can set it to a maximum and it will just slow the tonearm motion of a small fraction.
The problem comes when it's time to play a record: if the stylus is not lowered right into a groove, it's pushed so hard towards the center that it will skip even the first grooves for a couple of millimeters! So, instead of lowering it at the beginning of the record, and wait for the lead-in to make its job, I have to take great care and place it over the first grooves of the music. Which means I loose the first seconds of music. Quite annoying...

Now you might argue: you need to add more antiskating than allowed by your tonearm.
Not really. It tracks to 15 mN and according to the tonearm manual the antiskating has to be set to a minimum. My ears suggest me the same thing and even a test record tells me that maximum antiskating is totally wrong and the right value is close to the minimum (the test records, as usual, wants a bit more).

So what I have is a stylus that when into the grooves tracks wonderfully and is subjected to a regular skating force, but on unmodulated surfaces "feels" an enormous force leading it to the centre.

Anyone noticed the same problems with exotic stili, or can give me some hints on the possible causes (I don't think there's a solution..)?

Thank you in advance
nebelmeer80

Showing 2 responses by kirkus

The "ungrooved record test" has absolutely no correlation to a proper anti-skating force . . . actually, it has absolutely no meaning at all, especially with an elliptical or fine-line stylus.

This is because any reasonably modern elliptical stylus profile doesn't actually touch the groove on its very point, rather, there are two discrete points on the sides where it contacts each groove wall . . . these are plainly visible when the stylus is viewed under a microscope. So when you stick it on a record that has no grooves, the part of the stylus that's touching the record is NOT what's used when playing the record, so it's tracking behavior is completely indeterminate.

The best way to fine-tune antiskating with a test record is by checking trackability - both channels should reach their limits of distortion-free tracking performance at the same horizontal groove velocity. I'm assuming that this is what you're doing.

With regards to cueing difficulty -- I do think that some cartridge/tonearm combinations are more fussy than others, but I think that it's more about the interaction of many different parameters (i.e. cartridge compliance vs. tonearm mass) in addition to stylus profile and anti-skating adjustment. Of course, different shapes in the profile of the record's edge also have an effect, and even the grippiness of the rubber on the little shoe used in the tonearm's cueing device (if used) can make this more difficult.

I will echo the others' advice and re-check your setup parameters, but if it's all spot on and everything sounds great, then you might just need to cue by hand.
The problem is that Ortofon's quality, in my experience, isn't really up to their name. 2 out of 2 cartridges where delivered with a bent cantilever (the sound was dreadful) and had to return them...
That's really sad to hear. I used to set a lot of new Ortofons, and I would check each one under a microscope before it was installed . . . and 10-15 years ago, their quality control was way above average. The company has changed ownership and management in recent years, so maybe things have slipped, or you have simply had bad luck. Audio-Technica was about average, I would send back about one in every five AT-OC9s that I saw. Shure was horrible . . . I remember sending back 6 or 7 out of an order of ten V15-Vs at one point. These were mainly bent or twisted cantilevers, or styli that were mounted crooked on the end.

FWIW, the Ortofon fineline stylus is a really nice profile, so (QC issues aside) it should deliver excellent tracking performance for a long time.