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Turntable speed accuracy

There is another thread (about the NVS table) which has a subordinate discussion about turntable speed accuracy and different methods of checking. Some suggest using the Timeline laser, others use a strobe disk.

I assume everyone agrees that speed accuracy is of utmost importance. What is the best way to verify results? What is the most speed-accurate drive method? And is speed accuracy really the most important consideration for proper turntable design or are there some compromises with certain drive types that make others still viable?
peterayer
frogman
7,442 posts
 
I give up.
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unoear
141 posts
 
Hello Ct057,

Two out of three...;-)...
Ag insider logo xs@2x
unoear
141 posts
 
Hi Thuchan,

I do understand that your system stands in Bavaria and it is located on-speed outside of Munich :-)

Also, I like following this attitude of "but sometimes fast driving"...out on the road! :-)

Always happy listening!
pryso
1,928 posts
 
Ct, "Can someone technical explain to me what "5kg - cm" really means in laymans terms."

From the SP-10 Mk2A Operating Instructions:

"If 500 tonearms of 2 g. tracking force were placed on a record at the same time the turntable would still maintain each rated speed."

If this is correct, it does seem to offer a reasonable margin. ;-)
lewm
13,049 posts
 
Dear Ct, Always glad when I can "clarify" something for you, but who can imagine 500 tonearms sitting on one LP? Now that takes some fantasizing. Thanks, Tim, for bringing up that very simple metaphor.

Downunder, if the battery in the Timeline is running low, at some point the laser will abruptly turn off completely, I would think. I think the laser operates like and LED which is like a diode; you need a threshold of energy to activate it. So when you go below that threshold - no light. In any event, I do not think waning battery life would affect its frequency.
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