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Ever so slight platter wobble

I have a bix DIY table that I got from a friend. I noticed that when I look at the bottom of the platter or actually put a solid object underneath the edge of a spinning platter, every revolution the platter will touch the object. You can hear it. The wobble is tiny less than 1/2 mm at the edge. I dont have an arm for this table yet so I do not know how it sounds and I am wondering if I should even keep it. Will 1/2 mm impact sonic performance. Scientifically speaking it should not, right? Since whenever the platter dips, so will the tonearm. Do non diy or high end turntables also have tiny amounts of wobble?
malammik
ptmconsulting
1,000 posts
 
I'd be careful about any kind of washer, since that would intruduce an interface between platter and spindle that is not a firm and tight connection and can affect your sonics.

Try moving the platter about the spindle and see how that works. I had the same problem on my old VPI and this is what they suggested to fix the issue, which it did. Make sure it is pressed down firmly after seating. On the VPI this was done by cranking down the threaded record clamp, but I don't know what that means on your table and if it has a record clamp that is threaded or not.

Good luck,
Bob
frank_sm
113 posts
 
I watched the video. My observations are: The contact area is very small and close to the center of the supported mass. A larger diameter should have been used to support the 12" platter. It's just a bad design, coupled with poor execution or machining. You ultimately get what you pay for, Chinese manufacturing quality is a crapshoot.
psag
518 posts
 
I own a Teres table with wooden platter. Over the years, the platter developed a minor wobble attributable to shifting or shrinkage of the wood itself. I've spoken to Chris Brady about this, and we both agree that its sonically insignificant if less than 2 or 3 mm.
rccc
216 posts
 
"You ultimately get what you pay for, Chinese manufacturing quality is a crapshoot." would that be the same chinese manufacturing as the a fore mentioned VPI and Teres?
malammik OP
10 posts
 
It is a crapshoot but not necessarily always on a bad side. I have Antique Sound Labs amps made in China. Build quality and sound quality are very good.
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