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Turntable Tachometer and motor speed controller
Turntable Tachometer and motor speed controller
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Old 17th February 2020, 11:01 PM   #11
al2002 is offline al2002  India
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Join Date: Dec 2003
Location: USA
1) Bare PCB and Pre Programmed Arduino Nano 18.00 GBP
2) Full kit of parts 58.00 GBP
3) Fully assembled and tested board 98.00 GBP
1 for DieterK
1 for ZUM911
1 for koldby
3 for al2002
a) Linn Valhalla witch connector option 1.00 GBP
1 for ZUM911
3 for al2002
b) Momentary action switch/LED to fit OLEE enclosure 4.50GBP
1 for DieterK
1 for ZUM911
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Old 18th February 2020, 02:25 AM   #12
Godataloss is offline Godataloss  United States
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Join Date: Apr 2016
Will this work with VPI HW 19 motors?
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Old 18th February 2020, 05:31 AM   #13
scobham is offline scobham  United Kingdom
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Join Date: Mar 2008
Location: Merseyside
ZUM911 I have amended the list for you:

1) Bare PCB and Pre Programmed Arduino Nano 18.00 GBP
2) Full kit of parts 58.00 GB
1 for ZUM911
3) Fully assembled and tested board 98.00 GBP
1 for DieterK
1 for koldby
3 for al2002
a) Linn Valhalla witch connector option 1.00 GBP
1 for ZUM911
3 for al2002
b) Momentary action switch/LED to fit OLED enclosure 4.50GBP
1 for DieterK
1 for ZUM911
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Old 18th February 2020, 05:38 AM   #14
scobham is offline scobham  United Kingdom
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Join Date: Mar 2008
Location: Merseyside
Hi Godataloss, unfortunately I have no idea what kind of motor is in that turntable. You will need to do your own research. If you look at the two posts on page 1 I have provided information on how to identify if your TT uses a synchronous motor or alternatives. Shaded pole motors e.g. Lenco's require additional step up amplifiers. Good luck.

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Originally Posted by Godataloss View Post
Will this work with VPI HW 19 motors?
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Old 18th February 2020, 06:44 AM   #15
finwbu is offline finwbu  Finland
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Join Date: Dec 2002
Location: Helsinki
Turntable Tachometer and motor speed controller
Hi ,

can the Turntable motor speed controller handle a 24 pole hysteresis synchronous motor ?

regards finwbu
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Old 18th February 2020, 07:56 AM   #16
Sergelisses is offline Sergelisses  France
diyAudio Member
 
Join Date: Nov 2003
Location: Near PARIS
1) Bare PCB and Pre Programmed Arduino Nano 18.00 GBP
2) Full kit of parts 58.00 GB
1 for ZUM911
3) Fully assembled and tested board 98.00 GBP
1 for DieterK
1 for koldby
3 for al2002
1 for Sergelisses
a) Linn Valhalla witch connector option 1.00 GBP
1 for ZUM911
3 for al2002
1 for Sergelisses
b) Momentary action switch/LED to fit OLED enclosure 4.50GBP
1 for DieterK
1 for ZUM911
1 for Sergelisses
  Reply With Quote
Old 18th February 2020, 08:11 AM   #17
JensenHealey is offline JensenHealey  United Kingdom
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Join Date: Apr 2016
Location: Worcestershire, UK
Quote:
Originally Posted by Sergelisses View Post
1) Bare PCB and Pre Programmed Arduino Nano 18.00 GBP
2) Full kit of parts 58.00 GB
1 for ZUM911
3) Fully assembled and tested board 98.00 GBP
1 for DieterK
1 for koldby
3 for al2002
1 for Sergelisses
1 for JensenHealey
a) Linn Valhalla witch connector option 1.00 GBP
1 for ZUM911
3 for al2002
1 for Sergelisses
b) Momentary action switch/LED to fit OLED enclosure 4.50GBP
1 for DieterK
1 for ZUM911
1 for Sergelisses
1 for JensenHealey
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Old 18th February 2020, 03:19 PM   #18
scobham is offline scobham  United Kingdom
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Join Date: Mar 2008
Location: Merseyside
Providing it can be driven between 12v-120v rms and 10mA per phase, <100Hz then it should work.

Quote:
Originally Posted by finwbu View Post
Hi ,

can the Turntable motor speed controller handle a 24 pole hysteresis synchronous motor ?

regards finwbu
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Old 18th February 2020, 04:52 PM   #19
OtisCampbell is offline OtisCampbell  United States
diyAudio Member
 
Join Date: Feb 2014
Turntable Tachometer and motor speed controller
I might have missed the info but when is the cut off date for the GB? I'm researching to see if my stock motor on a Rega P3 is easily compatible. Thanks!
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Old 18th February 2020, 06:04 PM   #20
chromenuts is offline chromenuts  United States
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Join Date: Dec 2008
Location: Connecticut, USA
Hereís two examples of motors pulled from VPI turntables. They are both synchronous and can be run 2 phase or single phase with a cap.

The one that is simply engraved with the specifications is the original motor out of my early HW19.

The labeled motor is a backup pulled from another VPI turntable with essentially the same specs, albeit a different part number most likely due to the fact that it was produced much later.

VPI pretty much used the same motor for all its turntables for years. They eventually switched to a 300 RPM version that was rated at 7.5W which you can find in the drive units for tables like the TNT etc.


Here is a link to Hurstís current line of PA and PB motors.

PA, PB Direct Drive Permanent Magnet AC Synchronous Motors

No data is given as to how much current is consumed by these motors per phase as far as I can see. Maybe it can be figured out from the data provided.


I personally have completely done away with these motors and modified my HW19 to utilize the DIY SG4 4 Phase Sinewave generator and 3 channel class D amp that DIY member Pyramid designed to use with an Anaheim Automation 3 phase motor. He also is responsible for the Pheonix engineering Falcon controller and Roadrunner tach which I still own. The Falcon was limited to use with lower (i.e.5.5 watt) motors.


Link to my HW19 rebuild.

VPI resto-mod...a tale of bastardizing my HW19


Although I did integrate my Roadrunner tach into my control system to monitor speed, it is unfortunate that the SG4 is not capable of a feedback loop that allows speed regulation as the Falcon controller could with the lower watt motors.

I would be interested in this group buy if there was a way to integrate the tach feedback feature to regulate speed and still utilize my SG4/Amp/Motor combination.



Quote:
Originally Posted by scobham View Post
Hi Godataloss, unfortunately I have no idea what kind of motor is in that turntable. You will need to do your own research. If you look at the two posts on page 1 I have provided information on how to identify if your TT uses a synchronous motor or alternatives. Shaded pole motors e.g. Lenco's require additional step up amplifiers. Good luck.
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