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Turntable Tachometer and motor speed controller
Turntable Tachometer and motor speed controller
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Old 18th February 2020, 06:26 PM   #21
al2002 is offline al2002  India
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Join Date: Dec 2003
Location: USA
Amended to include push switches

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
3 for al2002
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Old 18th February 2020, 08:33 PM   #22
TKO956 is offline TKO956
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Join Date: Feb 2010
Can you please add me to the list for qty. 1 of each #2 and #b?

Thanks
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Old 18th February 2020, 10:15 PM   #23
scobham is offline scobham  United Kingdom
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Join Date: Mar 2008
Location: Merseyside
Hi Otis, probably close at end of Feb. Rega turntables usually use 110v synchronous motors or 24v on newer models so you should be good. The controller works with motors in the range of 12v to 120v RMS. Even turntables powered by 220v usually use 110v motors and the voltage drop is via an RC network.


Quote:
Originally Posted by OtisCampbell View Post
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, 10:23 PM   #24
scobham is offline scobham  United Kingdom
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Join Date: Mar 2008
Location: Merseyside
Godataloss great post by Chromenuts so it looks like your motor will be OK if it's a PA or PB type.

Chromenuts not sure if Pyamid's SG4 can take a speed input - would need Pyramid to comment on that. The motor controller board does output a the current speed via serial interface at 9600 baud. If Pyramid confirms you could take a bare PCB and Arduino and leave off all the drive components - you will just be left with a Tacho. Alternatively, add the DDS circuits, stack two boards to get 4 phase drive and feed into your Class D amps.
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Old 18th February 2020, 10:25 PM   #25
scobham is offline scobham  United Kingdom
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Join Date: Mar 2008
Location: Merseyside
Added TKO956's requirements

1) Bare PCB and Pre Programmed Arduino Nano 18.00 GBP
2) Full kit of parts 58.00 GB
1 for ZUM911
1 for TKO956
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
3 for al2002
1 for TKO956
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Old 19th February 2020, 10:20 AM   #26
orangeart is offline orangeart  United Kingdom
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Join Date: Jul 2010
Added Orangeart requirements.


Added TKO956's requirements

1) Bare PCB and Pre Programmed Arduino Nano 18.00 GBP
2) Full kit of parts 58.00 GB
1 for ZUM911
1 for TKO956
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
3 for al2002
1 for TKO956
3 with option a for Orangeart
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Old 19th February 2020, 10:43 AM   #27
chromenuts is offline chromenuts  United States
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Join Date: Dec 2008
Location: Connecticut, USA
Quote:
Originally Posted by scobham View Post
Chromenuts not sure if Pyamid's SG4 can take a speed input - would need Pyramid to comment on that.
Pyramid did not design the SG4 to accept speed input to my knowledge. I brought the subject up previously and as far as I know that feature was limited to his commercial Phoenix Engineering products.

Quote:
Originally Posted by scobham View Post
Alternatively, add the DDS circuits, stack two boards to get 4 phase drive and feed into your Class D amps.
I just want to see if I understand you correctly...

I would be able to keep the 3 channel class D amp that Pyramid designed along with the Anaheim 3 phase BLDC motor it drives?

I would be replacing the SG4 sinewave generator completely with two of your boards daisy chained that would allow me to generate the sinewave signal for up to 4 phases and manipulate the sinewaves to smooth out motor operation etc?

In addition, your boards would provide an RPM sensor and readout along with circuitry that allows feedback to lock in platter speed.

Would I need two full kits to cover this scenario?...or a full kit and an extra board with parts? How should I order?
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Old 19th February 2020, 04:27 PM   #28
Godataloss is offline Godataloss  United States
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Join Date: Apr 2016
Thanks for the thoughtful reply. I've actually read your vpi post before. I've got a couple of VPI HW 19 tables myself that I've tweaked on. Purchased properly, I think they are very hard to beat for the money. I have been looking for a speed controller for quite some time. I think this will fit the bill, my one concern is I think the Hurst site says the motor draws 10 watts. Is that too much?
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Old 19th February 2020, 05:41 PM   #29
chromenuts is offline chromenuts  United States
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Join Date: Dec 2008
Location: Connecticut, USA
The link I posted is supposedly Hurstís current line of PA and PB motors. It was just for reference as to the basic specifications of that line of Hurst motors. Just because the 600 RPM model they currently offer states it draws 10watts does not mean your motor is the same. VPi may also have had a contract with them to supply motors to their own specifications.

Your HW19 motor is most likely not rated at 10 watts if itís motor is original. It is most likely the same as the pictures of the 2 motors I posted which only draw 5.5 watts. The highest motor rating I have personally seen pulled from a VPI table was from a TNT flywheel drive which was rated at 7.5watts.

Itís possible your motor has been replaced by sourcing a motor directly from Hurst, as VPI definitely marked up their parts considerably and owners often sought alternatives.

In order to determine your motors actual specs you will have to pull the plinth, flip the table frame upside down and remove the bottom cover from the motor mount box. The info should be easily readable on the back side of the motor.
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Old 19th February 2020, 07:49 PM   #30
Raymond is offline Raymond  United Kingdom
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Join Date: Mar 2003
Location: Staffordshire.
Hi scobham
I would like these items please.
3 Fully Assembled £98.00
A Linn Valhalla Witch Connector £1.00
B Momentary Action Switch £4.50
Regards
Ray
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Last edited by Raymond; 19th February 2020 at 08:03 PM.
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