Hi guys, I would really like to build me a turntable just for curiosity and have some fun building stuff that sounds. 🙂
My main problem now is the motor. I want something cheap, easy and effective, nothing exotic or superdupermegapower-torque.
What do you think about the motor of a microwave like this one: LINK
Is it possible to control it in order to have exactly 45rpm?
I've read about the altmann project and also the floppy from audioorigami, but both have big limitations. The first is pretty unhandy and the second I suppose doesn't have enough torque.
What do you suggest?
My main problem now is the motor. I want something cheap, easy and effective, nothing exotic or superdupermegapower-torque.
What do you think about the motor of a microwave like this one: LINK
Is it possible to control it in order to have exactly 45rpm?
I've read about the altmann project and also the floppy from audioorigami, but both have big limitations. The first is pretty unhandy and the second I suppose doesn't have enough torque.
What do you suggest?
Hi,
A microwave motor simply has to turn the turntable. Wow,
Flutter, Noise and Speed Stability are simply not an issue.
FWIW they seem to be synchronous motors (good)
with a gearbox on top (bad). It may well be possible
to remove the gearing and attach a pulley. FWIW you
can't control them, speed is fixed to AC frequency.
You'll need the right size pulley for the belt drive.
rgds, sreten.
A microwave motor simply has to turn the turntable. Wow,
Flutter, Noise and Speed Stability are simply not an issue.
FWIW they seem to be synchronous motors (good)
with a gearbox on top (bad). It may well be possible
to remove the gearing and attach a pulley. FWIW you
can't control them, speed is fixed to AC frequency.
You'll need the right size pulley for the belt drive.
rgds, sreten.
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Exactly!
So maybe it could be a possible cheap motor. I don't care so much about controlling it, because most LPs are 45rpm, so I would just need one pulley. Right?
Do you have any other suggestions? Other cheap motors?
Look for 1800 rpm fractional horsepower motors on ebay. Preferably capacitor start, Bodine would be a preferred brand. Gearmotors, right angle that is, have a worm gear on the shaft unless you find one with a rear shaft.
Hi,
Most 12" LP's are 33 1/3 rpm, most 7" singles are 45 rpm.
TBH you'd be much better off cleaning up and trying to
improve an old turntable, or at least cannibalise one
for the major parts of DIY project.
I get the feeling ambition is way ahead of real knowledge,
and trust me, building a decent record deck is not trivial.
rgds, sreten.
Most 12" LP's are 33 1/3 rpm, most 7" singles are 45 rpm.
TBH you'd be much better off cleaning up and trying to
improve an old turntable, or at least cannibalise one
for the major parts of DIY project.
I get the feeling ambition is way ahead of real knowledge,
and trust me, building a decent record deck is not trivial.
rgds, sreten.
Last edited:
Acvtre:
Your best ( cheapest ) bet is looking into a VPI motor ( Hurst 300rpm ). If you are serious about making something good you will need to have access to or own a metal lathe to make some parts. You can also look on ebay under turntable platters or parts and go from there. It can be very rewarding and frustrating at the same time !!!! Needless to say you have lots of research and reading to do. Just my opinion.
Your best ( cheapest ) bet is looking into a VPI motor ( Hurst 300rpm ). If you are serious about making something good you will need to have access to or own a metal lathe to make some parts. You can also look on ebay under turntable platters or parts and go from there. It can be very rewarding and frustrating at the same time !!!! Needless to say you have lots of research and reading to do. Just my opinion.
this/\. look in your thrift stores or ask around especially the old folks. you never know what might turn up and often for free.
don't dismay the cheep plastic decks as they can be cannibalised and put in a better plinth. the old belt drive technics plastic stuff actually has a decent motor in them and can be had for very little money.
And above all you can not control the rotation of the microwave motor, because there is only one coil in it, it turns right or left indistinctly.
If you want to build a quality turntable speed controller then buy one of Meldano's kits, add a Project 16v motor (Project the turntable brand) and you are good to go. Better exists but only at 5x+ the cost.
I'm considering also this possibility. But maybe it doesn't have enough torque. I've read this tutorial, but I haven't understood some things: why 3.6V instead of 5V? And I have 34 pin IDE floppy, is it the same as the 32 pin used in the article? What type of pulley should I use for 33 and 45rpm?
Actually I've got a brand new sony floppy reader. Do you think it could work fine?
Original Technics SL 1310MK2 Direct Drive Motor SFMZ132 01 with Spindle Tested | eBay
Last week I saw a Technics SP 10 motor from their reference turntable at a quite fair Price too. Then you will of course need the diagram for the PSU.
Last week I saw a Technics SP 10 motor from their reference turntable at a quite fair Price too. Then you will of course need the diagram for the PSU.
Thank you so much for your interest, but consider that I live in Europe and it's better to avoid the custom taxes if possible.
However, I'm still searching for a cheap (less than 20€) motor and I really don't know where to look.
However, I'm still searching for a cheap (less than 20€) motor and I really don't know where to look.
Any small synchronous AC motor will work, these lock their speed to the frequency of the mains. You will need to size pulleys for correct 331/3 speed.
I think a bigger problem you will face is the platter bearing.
I think a bigger problem you will face is the platter bearing.
Ok, can you suggest me any cheap motor that would work and a simple psu that could drive it and let me choose the velocity?
About the bearing: I was thinking about motor bearing
About the bearing: I was thinking about motor bearing
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