I need to correct myself about not making a case against line contact styli. I presented some ideas about how these styli can pick up substantially more crud off of dics, more bits of melted vinyl chips and so on thus carrying much more tip mass than they should (a vinyl damage factor). I also speculated about how poor quality diamonds if used for high end stylus shapes can turn into chisels in the groove if a black spot on the diamond or a cleavage fracture forms on the stylus tip. I also mentioned how bushings can transmit heat well if they are metal, and on discs with high surface noise (which like sandpaper, will heat a stylus tip much more than smooth, well-lubricated vinyl). These specific little caveat worried me because of the deterioration I watched on a weekly basis on my AT OC9 ML cartridge with a higher level stylus design.
But when you compare styli to styli you have to assume that every stylus makers' diamonds are equal. Given that, the line contact styli with the longest linear contact lengths starting at the top of one side of the grove and ending up at the top of the other side of the groove, should have the lowest wear on vinyl, because the tracking force is distributed over this long length. I didn't say surface area because the vinyl is moving and so is the stylus (theoretically it goes up and down, side to side in an "X" pattern).
I guess that this is why Generally, I recommend shibata stylus designs or higher level stylus designs because of their fidelity, and also because they may have problems that COULD cause vinyl wear (so we'll just have to inspect those pesky styli each and every side of an album we play, as well as constantly cleaning styli), line contact styli still would cause less vinyl groove damage than elliptical or conical styli.
It says I have made 277 posts, yet I was only able to pull up 119, by using the author search function. Not sure why. I know I made posts with links to multiple web pages that had photos showing groove damage on vinyl. But I could only find this one so far. I'll keep looking.
This one is interesting, there are 5 pages and make sure your "Blink" function workshttp://www.micrographia.com/projec/proj ... ny0000.htm
These micrographs are interesting toohttp://pwatlas.mt.umist.ac.uk/internetm ... yl_z4.html
To think this makes soundhttp://www.edwardsamuels.com/ILLUSTRATE ... groove.jpg
a few more nice imageshttp://www.audiography.com.au/images/Re ... -Inner.jpg
Morehttp://www.mnmicroscopy.org/ProjectMicr ... Groove.JPG
But I don't know what happened to all the other links I posted. Let me know if you find them. Thanks