RE: [TCML] SRSG too slow

["Lau, Gary" <Gary.Lau@xxxxxx>]

Assuming that your motor is a standard asynchronous 14xx RPM @50Hz motor, to get it to run synchronously at 1500 RPM you'll need to open it up and grind four flats on the rotor.

I can't comment on how to open a motor that I can't see, but a synchronous RSG with six flying electrodes seems strange.  Assuming you have 50 Hz power and are shooting for 100BPS, you would need four flying electrodes.  

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of simon hewitt
> Sent: Wednesday, January 06, 2010 9:46 AM
> To: tesla@xxxxxxxxxx
> Subject: [TCML] SRSG too slow
> 
> Dear Group,
> 
> I've established my supposedly synchronous RSG is running at 1486 rpm, which
> I guess is causing the beat effect when the coil runs.
> I think the motor is not quite synching.
> Any ideas on how I can get it to go 14 rpm faster?
> 
> It's a benchgrinder, 6 flying contacts, about an 8 inch disk, not sure of
> power.  No power run caps, no phase control.
> 
> Annoying, I'm also stumped at how to get inside the thing, even when the
> screws securing the end dome are removed, it merely revolves but doesn't
> pull off.
> 
> Thanks,
> Simon

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