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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  (System | Reviews | Threads | Answers | This Thread)

11-09-11
  Responses (351-400 of 573)
Click title to read one, or click date to read all below it.

01-24-12   The timeline is giving you one data point per rotation. so ...   Tonywinsc

01-24-12   Thanks tony, a perceptive and illuminating commentary :^)   Halcro

01-24-12   Halcro, great info and thanks for sharing. what you have men ...   Dev

01-24-12   Dear dover: about thread/high mass platter my as are not rea ...   Rauliruegas

01-24-12   halcro, i can't think of a reason for a bearing to provide ...   Atmasphere

01-24-12   Use of a capstan, etc, or any strategy that increases the ar ...   Lewm

01-24-12   what style bearing is in the raven? i remember reading abo ...   Ketchup

01-24-12   There are a couple of different bearings used in this table, ...   Dev

01-24-12   Dear halcro: you always can try a different thread's build m ...   Rauliruegas

01-24-12   Halcro - great game eh. looks like dokovich has shown the ot ...   Dover

01-24-12   Lewm, that is a good point about belt contact with the plat ...   Peterayer

01-24-12   Hi peterayer, i had mentioned in the nvs thread i had test ...   Dev

01-24-12   Hello dev, yes, i had read that now deleted nvs thread, but ...   Peterayer

01-24-12   The concept of "belt creep" and what to do about i ...   Lewm

01-24-12   Hi ralph, that's a quote from peter moncrief's incisive arti ...   Halcro

01-24-12: Dev
Same model as yours which was also too fast ironically, the other table was a 30/2 and was too slow but when we put it on 45 too fast.

Owners were not very happy! specially when they thought it was set up correctly.

What do you do if you have no adjustments or worse the adjustments still don't allow you to get it accurate?

Not one table that I have tried has been spot on including my own with both speeds initially, some were really bad, mine wasn't but I learned that most could not be corrected either, mine was so I was lucky.

This TimeLine tool has assisted providing information that using other tools to set-up really to me are misleading but worse that manufactures are not paying close enough attention building their products.

So mine being off slightly, once I got it spot on I really could not hear nor feel the difference but on others I most defiantly could hear improvements if they were off badly so this is a postive tool to use and will be used in the future by me.

I recently went into a store whom I know the owner but will not mention the name and has some mighty exspensive tables and not one was spot on, he basically dismissed the use of the TimeLine saying they have all been set-up properly blah! blah!

I asked him if he did not mind to allow me to get one set-up using the TimeLine and then have a listen afterwards, it's not hard to do if there is a fairly accurate fine speed adjustment allowing such but the table also must be capable of doing such and this table was pretty darn close in the end but originally off pretty bad and this room we are talking big dollars.

I was told the rep was by the week prior and saying how sweet things sounded, humm!

When we were in the room he was tapping his foot and I said straight up are you for real, sorry but I'm not feeling it and this is a pce when I play at home my whole body gets into it and I just want to get up and boogie.

No way would it have me opening up my wallet but after using the TimeLine the sound was now locked in, the focus was way better, all arround just sounded different in a positive manner and just felt better if you know what I mean in a good way.

He came into the room and without even sitting down said he was already experiencing the difference so guess who will be getting a TimeLine to use.

Still did not leave me feeling the way I expressed above listening in my own place.

Personally I feel acurate table speed should be the basics of a table design, the foundation and then you go from there. If you can't get this right well ... I feel something is just wrong.

Dev  (Threads | Answers | This Thread)


01-24-12   Hi lewm, but using a mylar belt has it's own issues. static ...   Dev

01-24-12   Unfortunately bringing the motor closer to the platter also ...   Sarcher30

01-24-12   The comment about using viscous drag or friction to dampen p ...   Tonywinsc

01-24-12   it also results in less contact between the belt and the mo ...   Ketchup

01-24-12   Good point ketchup. the belt is more likely to slip on the c ...   Sarcher30

01-24-12   not what i wanted to read. i hate this thread. seriously: ...   Banquo363

01-24-12   i believe there are trim-pots inside the chassis that can va ...   Hiho

01-25-12   Banquo363, yes unfortuantly. i was told he is sending it t ...   Dev

01-25-12   I agree with atmasphere. turntables with excellent soundsta ...   Aoliviero

01-25-12   perhaps you should listen to a good dd turntable with a core ...   Halcro

01-25-12   Dev, the lenco is pretty near infinitely adjustable, as the ...   Lewm

01-25-12   Lewm, have been reading this for awhile and want to as ...   Uru975

01-25-12   Dear uru, i am not the font of all knowledge on this subject ...   Lewm

01-25-12   Thanks, dev. i was just joking, but your post does move me c ...   Banquo363

01-25-12   Lewm, the artemis is an interesting design. i have not heard ...   Sarcher30

01-25-12   perhaps you can try grounding the motor housing? _______   Hiho

01-25-12   Lew, are you saying that you was able to get the lenco diale ...   Ecir38

01-25-12   Sarcher, what is the evidence that the hum is (or was) due t ...   Lewm

01-25-12   Halcro, i'm not sure i agree with peter on this one. our mod ...   Atmasphere

01-25-12   Halcro, in my statement about ac belt driven tt's vs dc mot ...   Aoliviero

01-25-12   (quote)sarcher, what is the evidence that the hum is (or was ...   Sarcher30

01-25-12   Hiho, the motor was grounded. i am not the only one with a h ...   Sarcher30

01-25-12   lew.......have you not tested the timeline with and without ...   Halcro

01-25-12   Henry, i've done it both ways with the lenco and mk3. the dp ...   Lewm

01-25-12   Lew, how about the l-07d? sorry if i missed it...   Mab33

01-26-12   I decided to try another method for the thread drive. i conn ...   Halcro

01-26-12   Halcro - looks like the 2 threads are touching. if so you mi ...   Dover

01-26-12   Empire tt's based on ac motors using belts.   Aoliviero

01-26-12   Dover, i kind of like the idea of not placing lateral loads ...   Halcro

01-26-12   the empire is of course ac synchronous drive. but most of m ...   Atmasphere

01-26-12   increased friction and additional vibration/noise, especial ...   Ketchup

01-26-12   Hi dev - just curious regarding the sp10 mkii that you teste ...   Ct0517

01-26-12   Dear mab, l07d is not in service at this time. i am re-wiri ...   Lewm

01-26-12   Hi ct0517, i really did not pay attention, the owner said i ...   Dev


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