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[#1] How's LonG your table take to rest from 33rpm?    

It is a simple lenco after some basic. Maintainence....18 sec... Without the brake...



最後修改時間: 2021-04-03 13:25:55
hahayanyan
個人訊息 會員
49.xxx.xxx.125
2021-04-03 13:23
[#2] How's LonG your table take to rest from 33rpm?    

another test seem to be more meaningful to understand the main shaft bearing condition... ...without the attachment from the driving chain..

i hand spin it to about 83rpm and lets it rest.. and it take about 142 sec


try to hand spin that to 100 rpm..but the phone fry off above 83rpm.. ....haha




最後修改時間: 2021-04-03 14:29:55
hahayanyan
個人訊息 會員
49.xxx.xxx.63
2021-04-03 14:25
[#3] How's LonG your table take to rest from 33rpm?    
same test on a TD126 without the the belt attached

it take about 164sec to rest Vs Lenco at 142 ( from about 83rpm to 0)

and from about 33.3 rpm to 0

the td126: around 63 sec
the lenco : around 41 sec

fair to say..the td126 main shaft bearing is smoother.. between 2 of those particular table under my roof
hahayanyan
個人訊息 會員
49.xxx.xxx.97
2021-04-03 16:22
[#4] How's LonG your table take to rest from 33rpm?    
Needs to consider the mass of different platters as well.
mcc2018
個人訊息 會員
45.xxx.xxx.254
2021-04-03 16:54
[#5] How's LonG your table take to rest from 33rpm?    
Not excatly aiming to compare 2 different table, but why not to see those differences..

However it is a record for before and after... Kind of test


Such as I am going to use some SAE oil instead of sewing Machine oil...


Also understand the same conditon... A thicker lenco platter.. Etc..


All downward force affect the the bearing within their loading...etc

最後修改時間: 2021-04-03 16:57:35
hahayanyan
個人訊息 會員
49.xxx.xxx.97
2021-04-03 16:57
[#6] How's LonG your table take to rest from 33rpm?    
From 33.3 to zero

My lenco was 41 sec
My td126 was 63 sec

Someone else at UK.. His lenco was 92.5sec...


Omg...what had I done...

I need to work harder... Haha

最後修改時間: 2021-04-03 17:24:44
hahayanyan
個人訊息 會員
49.xxx.xxx.97
2021-04-03 17:24
[#7] How's LonG your table take to rest from 33rpm?    
Well, you think you fetch badly..............not at all!!

I just did mine with the Lenco set on 78. I let it run for a while before I turn it off............and it stops at.......15 seconds only!!!!

It was even worst withh 33.3 which takes .........6 seconds!!!

It must be a world record to stop.............but only for the wrong reason!!
fotheringay
個人訊息 會員
92.xxx.xxx.185
2021-04-03 17:48
[#8] How's LonG your table take to rest from 33rpm?    
15 sec.. Because of the idler was still attached.. Or even brake was applied..


If u press then idler arm down.. And set it free... Only the main bearing... Etc..

It will not be 15 sec.... Hopefully more Than 40

Some lenco user over the Facebook.. Said.. After some cleaning and lub which is not too thin..., nothing fancy.. And they are 90 sec range


I shall try some motor oil.. I have some 0W/30,5w/40 around

最後修改時間: 2021-04-03 18:20:15
hahayanyan
個人訊息 會員
49.xxx.xxx.93
2021-04-03 18:14
[#9] How's LonG your table take to rest from 33rpm?    
This is how I hold the idler down...


So when it spin.. It is only the bearing
The purpose of my test is to understand the bearing condition but not the whole driving chain

hahayanyan
個人訊息 會員
49.xxx.xxx.93
2021-04-03 18:16
[#10] How's LonG your table take to rest from 33rpm?    
Some spin down time fun.. From some dual user

https://audiokarma.org/forums/index.php?threads/post-your-dual-tt-platter-spin-down-times.213665/
hahayanyan
個人訊息 會員
49.xxx.xxx.58
2021-04-04 00:10
[#11] How's LonG your table take to rest from 33rpm?    
我部Dual 1219 用33轉開左3至5秒就關機計時,總共轉了約2分09秒

Dual 1219 個轉盤重7磅,是dynamically balanced 設計,聲稱轉盆底有空位可放鉛粒去平衡個盤,有可能這是為何很多Dual 盤關機後都可以轉咁耐,未試過用手用力轉個盤,但相信會行好幾分鐘先停
ordinaryman
個人訊息 會員
135.xxx.xxx.76
2021-04-05 05:07
[#12] How's LonG your table take to rest from 33rpm?    
.

ordinaryman
個人訊息 會員
135.xxx.xxx.76
2021-04-05 05:08
[#13] How's LonG your table take to rest from 33rpm?    
,,lenco L75 platter 都有做動態平衡

Also my dual 721 also..


我貪得意去做呢個測試有兩個原因... 了解現有bearing quality.. 同埋要解唔同嘅潤滑油的分別

目前我改用了Mobil 5w/40 改進了41秒去到74秒.. And wow & flatter % is also better.. Down to 0.03 to 0.06%... From 0.07 to 0.09%


I will change the oil for my thorens from sewing machine oil to 0w/30

兩分幾鐘都好似很好呀

最後修改時間: 2021-04-05 10:52:27
hahayanyan
個人訊息 會員
49.xxx.xxx.18
2021-04-05 10:50
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