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Re: calculating bps for sync rsg..Thanks!

Hi Jon,

Just so you know, "standard ac motors" as you call them fall under 2 catogories
as far as rotational speed is concerned. The 1750 rpm (or similar) and the 3450
rpm (or similar). The 1750 rpm gets 4 flats for synchronus 1800 rpm rotational
speed and the 3450 rpm gets 2 flats for 3600 rpm rotational speed. In both
cases, it is a multiple of the 60Hz line frequency. I assume your motor was of
the 3450 rpm type prior to converting. Just wanted to throw this out there just
in case you modified a 1750 rpm motor with only 2 flats. If so, it's not right.

Bart

> Original Poster: "Jon Lagler" <rockcrawl@netzero.net>

> Thanks everyone for the responses! I am using a standard ac motor which I
> have modified by cutting/grinding two flats on the armature. I guess this
> brings the RPM up to 1800, and so I have 120 breaks per second.
>
> Thanks,
> Jon