Japanese Papst on steroids (a Sony motor)

[happycat]

Has anyone ever seen one of these in their reel to reel decks?
Turns out that it's a Japanese version of the Papst “flywheel” motor.

Would this make a good turntable motor? Well the shell is already balanced.

 

[Mikewong]

I got one that run with 720RPM with 50V AC but the torque is a bit low to be used as a turntable motor.

 

[happycat]

thanks.
I guess it will put this motor back into the reel to reel.

 

[EC8010]

... but the torque is a bit low to be used as a turntable motor.

So long as it can keep the platter going round you don't need really much torque. Nottingham Analogue use such weedy motors that you have to start the platter moving by hand - the motor can't start it. That motor looks good to me.

 

[qwad]

😀 agreed, l had a no-name tt one time that once you put a dustbug on the lp had to be hand assisted to come up to speed, but once there kept going all day without missing a beat
cheers T.C.

 

[Nanook]

honinbou,use the motor!

if its as good as it appears, use it! nothing wrong with low voltage.
As EC8010 points out, not much voltage is required to keep a motor spinning (and platter) once it is up to speed.

In fact to get a correct speed, you may have to alter the voltage (if DC type) or change the frequency if AC type and the voltage.

Air pax motors used in Linn LP12 turntables apparently run great when fed 72VAC or so...


stew

Edit: Spoonerisms edited out by moderator!

 

[Mikewong]

I got one that run with 720RPM with 50V AC but the torque is a bit low to be used as a turntable motor.

And here is the attached photo.

 

[Nanook]

Mikewong...

if I recall, as motor speed drops, torque increases in a linear fashion (almost). Feed that motor with a different frequency, and drop the voltage. Speed will be reduced and torque will increase, perhaps making it suitable for a turntable. Or do some math, calculate the required platter speed, then make an intermediate pulley (2 stepped) to be driven by the motor and to drive the platter.

stew
Happy New Year to all, where ever you are 🙂

 

[happycat]

Thank you all. I guess I'll keep the flywheel motor for a future turntable project.

 

[torontodude]

Great find!

For interest, here's a link to photos of my Dyna Empire 208/Papst set on Flickr.
http://www.flickr.com/photos/worldwidephotographic/sets/72157603524842069/

Is yours a 3-phase EC motor like the Papst??? I'm still looking for a digital-analogue controller for mine.

 

[happycat]

torontodude,
My Sony motor has four leads (two coils) and a motor capacitor. So it should be a two phase motor.