No problem Buscis. As i've mentioned, these forums should be about sharing and learning for the good of the community, regardless of who can help provide the info. I couldn't remember the exact cutting angle anyhow : )
As far as trying to duplicate the results on some type of homebrew equipment or a lathe, all i can say is be very careful. Splintering CD's would not be fun nor very cost effective. In extreme cases, it might not be very healthy either if bits and pieces of shrapnel come flying out at high speed.
As a side note, the Audio Desk unit has variable rotational speed and spins at a max of 9000 rpm. I always start off slowly and then build up speed. If you try to crank it up and then bring the cutting edge into contact with the disc, the cutting edge can either gouge the disc and / or crack it or get hung up on "casting flash" or a burr. Either way, the results are not pretty and the screeching sound will make you aware of a problem RIGHT away. I found this out the hard way when i did not clamp the disc down tight enough. The cutting edge caught the disc and held it in place while the platter continued to spin at 9 grand. As such, you have to have a very secure method of clamping the CD into place and hold it there under load while one is "trimming" the disc.
As to my "belief" in the effectiveness of the "de-magnetizing" or "anti-stat'ing" CD's, i do think that the results are audible even if they aren't measurable.
With that in mind, I would not call the results "plain as day" but i do think that the noise floor is reduced and the presentation is slightly more natural sounding. If one is to get the full benefit of such a treatment though, the plastic disc tray and mechanism that are so commonly found in most machines would also have to be "treated". Personally, i wipe down the tray and everything else that i can easily access inside the machine with "Static Guard" after applying it to a cloth. If you are going to do this, DO NOT wipe off the lubricant that might have been applied to the rails of the transport mechanism. The increased drag could result in the mechanism binding up and doing premature damage to the drawer motor. Sean
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As far as trying to duplicate the results on some type of homebrew equipment or a lathe, all i can say is be very careful. Splintering CD's would not be fun nor very cost effective. In extreme cases, it might not be very healthy either if bits and pieces of shrapnel come flying out at high speed.
As a side note, the Audio Desk unit has variable rotational speed and spins at a max of 9000 rpm. I always start off slowly and then build up speed. If you try to crank it up and then bring the cutting edge into contact with the disc, the cutting edge can either gouge the disc and / or crack it or get hung up on "casting flash" or a burr. Either way, the results are not pretty and the screeching sound will make you aware of a problem RIGHT away. I found this out the hard way when i did not clamp the disc down tight enough. The cutting edge caught the disc and held it in place while the platter continued to spin at 9 grand. As such, you have to have a very secure method of clamping the CD into place and hold it there under load while one is "trimming" the disc.
As to my "belief" in the effectiveness of the "de-magnetizing" or "anti-stat'ing" CD's, i do think that the results are audible even if they aren't measurable.
With that in mind, I would not call the results "plain as day" but i do think that the noise floor is reduced and the presentation is slightly more natural sounding. If one is to get the full benefit of such a treatment though, the plastic disc tray and mechanism that are so commonly found in most machines would also have to be "treated". Personally, i wipe down the tray and everything else that i can easily access inside the machine with "Static Guard" after applying it to a cloth. If you are going to do this, DO NOT wipe off the lubricant that might have been applied to the rails of the transport mechanism. The increased drag could result in the mechanism binding up and doing premature damage to the drawer motor. Sean
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