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| Possible? http://www.dcaudiodiy.com/phpBB3/viewtopic.php?f=5&t=733 |
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| Author: | Jim G [ October 15th, 2016, 5:57 pm ] |
| Post subject: | Possible? |
Come on guys, everyone else is discussing whether it's possible, a good thing, or a hoax. https://www.kickstarter.com/projects/24 ... -turntable |
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| Author: | SoundMods [ October 16th, 2016, 10:42 am ] |
| Post subject: | Re: Possible? |
Nice CGI. |
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| Author: | brombo [ October 16th, 2016, 11:21 am ] |
| Post subject: | Re: Possible? |
You could have a magnetic bearing, but magnetic levitation would have too many instabilities associated with it to work (the platter would wobble and would need the center of mass to be exactly on the axis you want the platter to rotate around). A magnetic or an air bearing might be a good idea. |
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| Author: | SoundMods [ October 16th, 2016, 1:04 pm ] |
| Post subject: | Re: Possible? |
Brombo is correct. However, if you have deep enough pockets there are already magnetic and air-pressure suspended turntables on the market. |
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| Author: | TubeDriver [ October 17th, 2016, 11:38 am ] |
| Post subject: | Re: Possible? |
Without a bearing/spindle, it is impossible. |
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| Author: | Jim G [ October 18th, 2016, 10:53 pm ] |
| Post subject: | Re: Possible? |
Here's a video update they posted : https://www.kickstarter.com/projects/24 ... ts/1707051 |
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| Author: | TubeDriver [ October 19th, 2016, 9:06 am ] |
| Post subject: | Re: Possible? |
Without a spindle, how is the platter centered? Floating a platter with magnets is probably fairly easy but it needs to be ABSOLUTELY centered at all times and that requires a spindle. |
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| Author: | Roscoe Primrose [ October 19th, 2016, 9:16 am ] |
| Post subject: | Re: Possible? |
I think the real problem is going to be keeping the platter level. Tracking force is going to cause the platter to tilt it's axis, and the tilt will vary based on both tracking force & vary as the lever moment changes while the record is playing. Centering should be do-able with creative use of magnetic field shape. It should certainly be possible to keep the centering tolerances smaller than the typical off-center hole in an album  Roscoe |
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| Author: | TubeDriver [ October 19th, 2016, 1:08 pm ] |
| Post subject: | Re: Possible? |
I don't know, pretty much no records have exactly centered holes and some are way out of spec. Now imagine a magnetic setup responding to the off center record hole. Not pretty IMHO. Plus the whole VTF effecting how level the platter is. But who knows maybe this can work and will revolutionize TT technology? Roscoe Primrose wrote: I think the real problem is going to be keeping the platter level. Tracking force is going to cause the platter to tilt it's axis, and the tilt will vary based on both tracking force & vary as the lever moment changes while the record is playing.
Centering should be do-able with creative use of magnetic field shape. It should certainly be possible to keep the centering tolerances smaller than the typical off-center hole in an album Roscoe |
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| Author: | SoundMods [ October 19th, 2016, 1:29 pm ] |
| Post subject: | Re: Possible? |
FYI all. Here is one magnetic suspension TT as one example: https://www.wired.com/2013/10/mcintosh-mt5/ Here is one air bearing TT as one example: https://walkeraudio.com/proscenium-black-diamond-v/ |
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