Finally I got a record lathe.

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the_ducktail
Posts: 105
Joined: Thu Dec 20, 2012 8:08 am

Re: Finally I got a record lathe.

Post: # 25331Unread post the_ducktail
Sat May 11, 2013 6:42 pm

Image

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the_ducktail
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Re: Finally I got a record lathe.

Post: # 25332Unread post the_ducktail
Sat May 11, 2013 6:44 pm

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some dust but nothing to worry about

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the_ducktail
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Re: Finally I got a record lathe.

Post: # 25333Unread post the_ducktail
Sat May 11, 2013 6:45 pm

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dust and other stuff I save it all due to can be important parts...see next picture

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the_ducktail
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Re: Finally I got a record lathe.

Post: # 25334Unread post the_ducktail
Sat May 11, 2013 6:49 pm

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heres what I found inside, now the chromed thing like a tip of a pen...seems to be a piece that do some kind of connection between the fuse and lathe. luckily I didn't throw it away. it has a spring inside. but the other small spring I dont know what is that for? the other plastic black pieces...Also dont know.

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the_ducktail
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Re: Finally I got a record lathe.

Post: # 25335Unread post the_ducktail
Sat May 11, 2013 6:56 pm

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this seems to be a fuse camera due to in the metal part it reads: 3A 125V

3 amps OK but 125 volts? is because it is from the US?

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the_ducktail
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Re: Finally I got a record lathe.

Post: # 25336Unread post the_ducktail
Sat May 11, 2013 7:02 pm

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now this says 220V
2.1 MFD

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the_ducktail
Posts: 105
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Re: Finally I got a record lathe.

Post: # 25337Unread post the_ducktail
Sat May 11, 2013 7:21 pm

Image

heres ALL written on this motor:

Ashland Electric prod inc
AEP motor
Long Island City , NY USA

AMP: 04 PH: 1
SER: 3175
VOLTS: 114 CY: 60
CAT: D80KBV-1
TYPE: HYST.SYNC.MOTOR
RPM: 1800 HP:1/100
oC RISE: 30
DUTY: CONT MFD: 2.0

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the_ducktail
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Re: Finally I got a record lathe.

Post: # 25339Unread post the_ducktail
Sat May 11, 2013 7:24 pm

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one more from the fuse camera.

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markrob
Posts: 1623
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Location: Philadelphia Area

Re: Finally I got a record lathe.

Post: # 25370Unread post markrob
Mon May 13, 2013 9:32 am

Hi,

Good work grabbing the motor details. You have the better style motor (Synchronous type). These are preferred over the typical shaded pole induction motor. Its shaft speed is an exact multiple of the line frequency (1800 rpm / 60 hz = 30). So at 50 hz, the motor will run at 1500 RPM. You really need some sort of frequency/voltage converter or you'll have to make mechanical changes to your machine to adapt it to the slower shaft speed. Looks like the motor is only rated at 1/100hp (7.5 watts shaft output power). That means you won't need much to power this up if you go the frequency converter route (15-20 watts should be fine).

Mark

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the_ducktail
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Re: Finally I got a record lathe.

Post: # 25378Unread post the_ducktail
Mon May 13, 2013 1:31 pm

so the better idea should be to use a shaft adapter or to change idlers right? About the idlers...I noticed 78rpm are smaller than 33rpm. so if this will run slower at 50hz I will need to reduce the idlers size I have, for them to run faster and run at right speed?

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markrob
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Location: Philadelphia Area

Re: Finally I got a record lathe.

Post: # 25385Unread post markrob
Mon May 13, 2013 6:12 pm

Hi,

It's tough call. If you are going the mechanical route, I'd work on the motor shaft pulley. Since your lathe already has the 3 idlers for all speeds, I'd keep them as-is and concentrate on the pulley. However, you will still need a good step down transformer to feed the motor 120V vs. 240V.

If you can find a pure sine wave inverter like this:

http://www.theinverterstore.com/180-watt-pure-sine-wave-inverter.html

along with a 12Vdc powersupply, that might be the easiest route. Then you don't risk messing up the mechanics of your lathe. It should be easy to find a 12Vdc power supply that runs off of your local AC mains (240 V 50hz).

BTW, as far as the compound idlers go, its the ration of the upper and lower diameters that set the speed. So even though the 78 idler looks to be smaller in diameter, its actually a smaller reduction ratio than the 45 or 33 (looks to be close to 1:1).

Mark

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the_ducktail
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Re: Finally I got a record lathe.

Post: # 25404Unread post the_ducktail
Tue May 14, 2013 11:07 am

Thanks Markrob

I will do it that way.
Two questions. just to be sure:

1) About the 180 Watt Pure Sine Power Inverter with USB Port by AIMS
this should be output 120 Volts ac right?
output 220 will not work? (theres plenty of them at my country)

2) About the 12Vdc powersupply
I found at my country:
http://articulo.mercadolibre.cl/MLC-408833785-fuente-de-poder-12v-30a-con-potenciometro-_JM / 30 amps
http://articulo.mercadolibre.cl/MLC-408833786-fuente-de-poder-12v-10a-con-potenciometro-para-camaras-_JM / 10 amps

I want to buy the 30 amps. Are these the ones I need?

Best regards.

Richie.


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markrob
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Location: Philadelphia Area

Re: Finally I got a record lathe.

Post: # 25406Unread post markrob
Tue May 14, 2013 12:05 pm

Hi,

The power supplies and inverter you selected look fine to me. The 30 amp supply is probably overkill, but it is not that much more costly, so I'd go with that. I assume it operates from 220Vac 50hz at the input.

I don't see any specification for the line frequency accuracy for the lower priced pure sine inverters, but since these seem to microprocessor based, I assume they are quartz crystal controlled. If not, you may see a slight speed error. But I expect it would be small worst case.

Mark

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the_ducktail
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Re: Finally I got a record lathe.

Post: # 25412Unread post the_ducktail
Tue May 14, 2013 1:35 pm

Markrob:

Thanks I will go buy these things and will let you know how is this going.
I will try to clean up the lathe meanwhile and open the record head to check if all seems to be in right shape.

Have a nice week bro.

Richie.

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the_ducktail
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Re: Finally I got a record lathe.

Post: # 25456Unread post the_ducktail
Wed May 15, 2013 11:48 am

Image

this is for a 125v 3a fuse but is this any special kind of fuse or just regulare ones (made of glass with two end tips made of metal and a thin metal fiber inside)?

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studiorp
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Re: Finally I got a record lathe.

Post: # 25457Unread post studiorp
Wed May 15, 2013 12:35 pm

Then you can clean the turntable bearing under the platter from old grease or oil.

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the_ducktail
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Re: Finally I got a record lathe.

Post: # 25817Unread post the_ducktail
Thu Jun 06, 2013 4:24 pm

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its functioning with a 110v transformer but as Markrob said, its not at the right speed :) but I bought a sine wave inverter and a power supply, not installed yet but soon will be here to record some cuts :)

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the_ducktail
Posts: 105
Joined: Thu Dec 20, 2012 8:08 am

Re: Finally I got a record lathe.

Post: # 25818Unread post the_ducktail
Thu Jun 06, 2013 4:28 pm

head disassemble

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does someone knows how to check if the head is fine?? regards :)

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markrob
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Location: Philadelphia Area

Re: Finally I got a record lathe.

Post: # 25824Unread post markrob
Thu Jun 06, 2013 7:55 pm

Hi,

Good to see you are making progress. The head looks to be in great shape. Since its an 8 ohm impedance, just hook it up to an audio power amp capable of driving 10-50 watts and feed some program material into the head. Monitor the voltage at the head terminals with an multimeter set for AC volts and make sure you are not driving it with more the 2-3 Volts (short duration peaks can be higher). If the head is working, you should be able to hear the audio (sound will be tinny). You should also be able to feel the stylus holder vibrate if you touch it with you fingertip.

Mark

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