analogadikt
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« on: October 29, 2019, 05:48:27 AM » |
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This procedure has been described in one of the SME 30** manuals, it can be adopted for any knife edge tonearm.
After adjusting the VTF, and before hanging on the bias weight, a screwdriver should be inserted under the arm tube, just ahead of the arm Piller. The screwdriver should be perpendicular to the tube and the round section of the blade should be under the tube. Now, ensuring that the screwdriver is horizontal, move it up a little so the knife edges are lifted out of their seat. The arm tube is now supported only on the arm rest and shall immediately roll to the side where the weight is more. Now, you have to move the wayrod (that is the SME phrase IIANM) that carries the VTF weights in or out of the main counterweight until the arm tube stops rolling to any side and remains stable.
For the L75 arm, the front end of the arm tube should be supported on a small wooden block or something suitable that shall allow the tube to roll. The lateral balance can be adjusted by twisting the main c/w on the stub, the hole is off center, so the down Force of the weight can shift around the arm tube axis.
HTH
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g8ina
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« Reply #1 on: October 29, 2019, 09:01:09 AM » |
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Very useful tip, thanks !
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hatehifi
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"fascinating times in which we are living"~grandpa
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« Reply #2 on: October 29, 2019, 09:44:04 AM » |
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 Thanks Anwesh! Cheers!
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John
Little Feat (Mercenary Territory)
"I've did my time in that rodeo. It's been so long and I've got nothing to show. Well I'm so plain loco, fool that I am I'd do it all over again."
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Kno
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« Reply #3 on: October 29, 2019, 10:42:16 PM » |
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I hadn’t considered this before but I guess the outrigger on the side furthest from the platter is driving the knife edge into that v block.....so this trick is to spread the load evenly across the two v blocks to keep friction and downward force on the pillar even.
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David
L75 Marvellous Tatty (Silvernote 512, increased mass stock plinth, sph main bearing collar, Jolyon bearing), Yamaha AS301, Q Acoustic 3020
GL78 Bouncy Castle (stock, sprung, and sings likes a bird), Cambridge A1 Mk1 (Mike Creek), Cambridge CD5 v.3 Pyramid 4080
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dtroise
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« Reply #4 on: October 29, 2019, 10:57:51 PM » |
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I hadn’t considered this before but I guess the outrigger on the side furthest from the platter is driving the knife edge into that v block.....so this trick is to spread the load evenly across the two v blocks to keep friction and downward force on the pillar even.
Now that makes a lot of sense but that means that the C/W would swing inward for the balance, I wonder if that would in fact affect the anti-skate or maybe just do away with the anti/skate. I think that I will try that and see. Don |
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dtroise
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wer
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« Reply #5 on: November 01, 2019, 12:46:34 PM » |
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Now that makes a lot of sense but that means that the C/W would swing inward for the balance, I wonder if that would in fact affect the anti-skate or maybe just do away with the anti/skate. I think that I will try that and see.
Don
I don't think it would influence the AS. The balancing is static to eliminate a twisting tendency of the arm tube. it does not influence the skating force once the arm is in the groove. |
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Werner (wer - just my initials, not a nick!)
No esoteric audio equipment (except for my wife)
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drkhanwelkar
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« Reply #6 on: November 13, 2019, 04:26:22 AM » |
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Thanks Analogadict.
Very nice suggestion.
Logical and will bring out fine nuance easily.
Tried this and was successful.
Now I doubt whether I should buy 12 incher or not.
But any way will dive in.
Sent from my SM-G965F using T***talk
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analogadikt
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« Reply #7 on: November 13, 2019, 01:19:43 PM » |
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 Well done Doc 
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analogadikt
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« Reply #8 on: July 02, 2020, 02:45:04 PM » |
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Thanks to member MBaijs' for sharing the original instructions from the SME manual Here they are :-  Regards, |
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Cremekongen
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« Reply #9 on: July 02, 2020, 03:07:10 PM » |
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Very interesting and helpful - thanks for posting Anwesh - i will try this adjustment on my SME.
/Ole
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Ole
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