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VPI Single Motor Flywheel / SDS / Aries 3

I just purchased a new VPI Single Motor flywheel for my Aries 3. I have an SDS. It seems like I get answers a little quicker from this forum than VPI, although I have a call in to them.

Here is my dilemma: When I have the Single Motor Flywheel plugged in to the SDS or the wall outlet, the motor turns the flywheel too slowly and I am several HZ below the 60Hz/33RPM on my SDS. The sound is very slow and clearly under 33 rpm on the platter. The flywheel seems we lubricated and turns easily. The motor is quiet. It's just slow. So slow, I have to turn the SDS up to 65-66 HZ to approach strobe disc accuracy and acceptable sound for 33 rpm. Haven't even tried 45 rpm yet.

The motor is placed within proper distance to the flywheel. It came with two small brown belts for the motor to spin the flywheel and one larger black belt which appears to be the same size as the belt used on the Aries 3 regular 300 rpm motor.

Is this normal? Anyone with VPI single motor flywheels or experience with them that could give me advice would be greatly appreciated.
philb7777
tfkaudio
589 posts
 
Hi Stan,
I've noticed that the voltage on my SDS will sometimes read 72, and at other times will read 84. And this happens without making any changes to my system. I've often wondered why this happens.

Cheers.

Tom
stanwal's avatar
stanwal
3,147 posts
 
Tom, the same thing is happening to mine. After I did my last post I went back downstairs and, still plugged into the dedicated line, it read 84 again. Now it reads 72 but switches to 84 when I turn the motor on. I have had it on the Scoutmaster, I am going to put the Aries back up this afternoon and see what happens. I earlier tried it with the Scout and the pulley didn't rotate, just vibrated, I don't know what to make of that at all.
philb7777 OP
401 posts
 
Guys, mine does the same thing: 84v to start and then quickly to 72v in 33 rpm and up to 115v to start and down to 102v in 45 rpm. I think this is normal activity and its the way the SDS 'kick starts' the spinning to get things moving then back to the optimal operating voltage once spinning start equilibrating.

Repeating a quick question: has anyone out there replaced or changed out the black delrin motor pulley on a VPI 300 rpm motor or single motor flywheel? Just wondering how you do it. Thanks.
joe55ag
27 posts
 
Hi Again,
The SDS is made to jump start the platter and then reduce voltage after a few seconds on both 33 & 45 speeds..

That is normal operation..

However this is only when you use the switch on the SDS as your on and off switch. I do not. Mine works fine at the reduced voltage using the motor switch as the on and off..

Here is the Correct Pulley for the setup. Mine works very well with this.

Joe

philb7777 OP
401 posts
 
Joe, I agree about the SDS. My Single Motor Flywheel was sent with a different pulley (I think made for people without SDS).

Here is a pic of it and my current setup:

http://www.me.com/gallery/#100009

Mike from VPI sent me the HRX pulley that is shown in your pic from your previous post.

I wanting to replace it, but no instructions were sent on how to. Of course I could wait until Monday and shoot Mike another email, but I'm hoping someone out there has replaced a pulley on a VPI motor and can give me some advice.
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