VPI Scout running FAST...help?


Ladies and Gentlemen-

For your consideration, I present my very first world but very real audio problem.

Proud (sorta) second owner of a VPI Scout One. 11.5 Acrylic platter, 600rpm motor. Approx 3 years old, appears very little previous use.

At the present, the table is running at a steady and consistant speed of 34.6 and 47.1. I have tested the speeds using my ears (songs sound too fast), a strobe, the old fashioned counting RPM's over a 3 minute period, and even so far as to have a friend bring over a centerfuge calibrator from a medical lab. So I am certain that these are the speeds it is presently running.

Things I think I have ruled out:

Belt is new, but not brand new

Table is on a flat, level surface

Pulley is attached soundly in the motor

The reported speeds are at the top "rung" of the pulleys, I am aware that the higher up the pulley the belt is, the slower the platter turns.

Outlet power is ok, I have tested the table on multiple outlets and it is the same, also, my older Pro-ject table ran a consistant 33.5 on the very same outlet.

This is where I run out of ideas. I have placed an e-mail and call to VPI, but have not heard back yet. Anyone have any ideas? Goin crazy here...

Thanks in advance-
thebambino
Actually there should be three set screws at the bottom of the pulley. I just replaced my old 600 RPM motor with the 300 RPM motor, I had to, the old one was dying. Then I had to wait another 2 weeks for VPI to ship me out the new pulley that I would need with the 300 RPM motor. Both pulleys, on the old motor and new motor, have three set screws in the bottom of the pulley to hold it to the motor shaft.
Fairly simple swap. All you need is a 5/64 Allen wrench.
Hmmm....don't think it's a 5/64 Allen on my motor, appears to be something a bit smaller as my 5/64 definitely ain't fitting...off to Home Depot
Ask VPI to send you out your replacement pulley asap. Upon arrival, you will ship out the old pulley, thereby eliminating any downtime. After all, we are talking about a $5 part.
Thanks BRF- the original is on it's way to VPI, and I wouldn't mind them having it in their hand to make sure they don't send me the same pulley again by mistake. Unlikely, but so is putting a pulley for a 12" platter on my motor in the first place:)

Also, to save headaches for anyone attempting the pulley swap in the future, the grub screws on the pulley are 1/16, and the screw attaching the brass nut below is 1/20...why the hell the US never went metric I'll NEVER understand haha