From bruce@ashbysolutions.com Thu Nov 02 13:03:31 2006
Subject:Re: rotor syncing

Hi All,

The upper and lower pulleys on a Leslie are slightly different sizes. Thus, even if they start out aligned, they won't stay "in sync" over time. Add in the fact that the two rotors have different inertia, and it's near impossible to sync the two electronically. Such a system would require some kind of sensor to tell where in the circle each rotor was at any given time.

The only "rotor sync" systems that I've ever seen are 100% mechanical -- they have some kind of bar that links the two rotors together. And, at risk of beating the topic to death: why would anyone want to sync the two rotors, even at Chorale speed? The Leslie audio effect depends on the random nature of the rotor system.

Regards,

-BW

--
Bruce Wahler
Design Consultant
Ashby Solutions™ http://consult.ashbysolutions.com
978.386.7389 voice/fax
bruce@ashbysolutions.com

At 08:20 PM 11/2/2006 +0000, you wrote:
>Do the 2-speed kits (eg. Caribbean Controls) make the upper and lower
>rotors synced for chorale? I'm planning at some point of adding a
>conversion kit to a 45.
>
>--- In CloneWheel@yahoogroups.com, Patrick Benfield
> wrote:
>>
>> My Leslie 22H (like a 122 but single speed) was synched, and I
>didn't like the effect, especially after adding a motor control kit to
>add slow/chorale.
>>
>> -Patrick
>>
>>
>>
>> Bill Lechow wrote:
>> Has anyone had experience with syncing bass and treble
>rotors on a Leslie
>> with one of those kits?
>>
>> What did it sound like? Any other comments? Think it's worth it?
>>
>> Bill
>>
>> [Non-text portions of this message have been removed]

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