Belt driven Synchronous Motor vs. DC Motor for Record Players - diyAudio
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Old 11th May 2012, 10:34 AM   #1
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Default Belt driven Synchronous Motor vs. DC Motor for Record Players

Most user say, the best kind of motor for this aim is a DC motor.
Are there also a benefit for the synchronous motor in opposide to a DC motor?
Thanks for advices.
some URLs for both kind of motors:

Papst DC Motor
"GS 38.09" oder "VDC-3-43.10" (937 4310 602)
DC-Motor - VDC-3-43.10 B00 von ebm-papst
http://img.ebmpapst.com/products/dat...B01-615582.pdf
und unter posting 24 unter
Papst Motor VDC-3-43.10 - Phono - Restaurierung und Selbstbau - Analog-Forum

Mclennan Synchronmotor MV86111
Motors
http://www.mclennan.co.uk/datasheets...0411131813.pdf
http://www.mclennan.co.uk/datasheets...vdatasheet.pdf
Dr. Fuss Motornetzteil - Frank-Landmesser.de
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Old 11th May 2012, 01:16 PM   #2
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My father has an old Winco turntable, and uses asychronous AC motor, and still works pretty fine, including the strobo test.
Attached Images
File Type: jpg Winco 01.jpg (27.0 KB, 388 views)
File Type: jpg Winco 02.jpg (116.0 KB, 384 views)
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Old 11th May 2012, 01:26 PM   #3
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I would say that AC or DC motor is not the defining parameter, once a good motor is chosen, it is a matter of how the speed of that motor is controlled.

DC motors can be quite good but they do require a very well designed controller to maintain the speed and prevent issues with speed drifting.

AC motors have been used for quite a long time and in some very high end quality turntables. They rely on the consistency of the AC waveform driving them (usually the AC frequency of your line supply).

I am going the way of AC motors, as they are in my favourite Thorens, Linn and Ariston turntables. I am currently building a controller project for AC sync motors. If you are interested in my thoughts about them, you can check it out at my blog.

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Old 11th May 2012, 02:02 PM   #4
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I would take a low voltage AC motor, 24v, and a controller from Daniel (user name Meldano) and run it lightly loaded in the deck using either viscous damping or an eddy brake to smooth out an vestiges of cogging.
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Old 12th September 2013, 11:21 AM   #5
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Default Lingo vs. RADICAL

are there any news concerning listening tests?
Who have heard Linn's last upgrade "RADICAL" against Lingo at the LP12 ??
see pics here:
Radical.....the inards
similar to this - so I think:
Motorsteuerung für Masselaufwerke
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Old 12th September 2013, 11:59 AM   #6
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Similar, well they are both DC motors- but that's it. The Linn uses a Maxon motor, the Pabst motor is a far more complicated animal altogether with hall sensors on the rotors. The Linn set-up is just a simple optical tachofeedback with a very slow feedback loop on top of a current sensing feedback arrangement.

The Linn radikal speed stability isn't that good. No better than a Lingo, but the motor is lower in mechanical noise.
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Old 12th September 2013, 02:17 PM   #7
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Quote:
Originally Posted by sq225917 View Post
Similar, well they are both DC motors- but that's it. The Linn uses a Maxon motor, the Pabst motor is a far more complicated animal altogether with hall sensors on the rotors. The Linn set-up is just a simple optical tachofeedback with a very slow feedback loop on top of a current sensing feedback arrangement.

The Linn radikal speed stability isn't that good. No better than a Lingo, but the motor is lower in mechanical noise.
Thank you for this advice.go also to Linn LP12 motor malaise ?
Quote:
Originally Posted by tiefbassuebertr View Post
Most user say, the best kind of motor for this aim is a DC motor.
Are there also a benefit for the synchronous motor in opposide to a DC motor?
Thanks for advices.
go also to
Linn LP12 motor malaise ?
some URLs for both kind of motors:

Papst DC Motor
"GS 38.09" oder "VDC-3-43.10" (937 4310 602)
DC-Motor - VDC-3-43.10 B00 von ebm-papst
http://img.ebmpapst.com/products/dat...B01-615582.pdf
und unter posting 24 unter
Papst Motor VDC-3-43.10 - Phono - Restaurierung und Selbstbau - Analog-Forum

Mclennan Synchronmotor MV86111
Motors
http://www.mclennan.co.uk/datasheets...0411131813.pdf
http://www.mclennan.co.uk/datasheets...vdatasheet.pdf
Dr. Fuss Motornetzteil - Frank-Landmesser.de
To this topic there is since a long time this already existing thread:
DC vs AC motors - a newbie needs help

Last edited by tiefbassuebertr; 12th September 2013 at 02:46 PM.
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Old 21st September 2013, 09:34 PM   #8
kevinkr is offline kevinkr  United States
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Berndt please repost with your comments outside of the quote. We all have these moments. Thanks.
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Old 21st September 2013, 09:37 PM   #9
berndt is offline berndt  United States
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Quote:
Originally Posted by SoundBound View Post
I would say that AC or DC motor is not the defining parameter, once a good motor is chosen, it is a matter of how the speed of that motor is controlled.

DC motors can be quite good but they do require a very well designed controller to maintain the speed and prevent issues with speed drifting.

AC motors have been used for quite a long time and in some very high end quality turntables. They rely on the consistency of the AC waveform driving them (usually the AC frequency of your line supply).

I am going the way of AC motors, as they are in my favourite Thorens, Linn and Ariston turntables. I am currently building a controller project for AC sync motors. If you are interested in my thoughts about them, you can check it out at my blog.

Audio This 'n Audio That

SoundBound
Hi, any progress on the ac sync controller?
Have a few decks using papst motors and want to build a speed controller, thanks.
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Old 21st September 2013, 09:46 PM   #10
sreten is offline sreten  United Kingdom
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Hi,

Synchronous is simpler for simple mains AC frequency derived
single speed stability and DC is simpler for variable speed/pitch.

Proper drive of simple DC motors is a subject much obfuscated.

rgds, sreten.
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