[R-390] Offset gear source Pass_2

[Cecil Acuff]

What I failed to mention was the 10 turn stop.  You need to set the 
alignment of it as well if you diddle with it as part of the process....but 
it's not too hard and outlined in the book.

Cecil
----- Original Message ----- 
From: "Cecil Acuff" <chacuff at cableone.net>
To: <Flowertime01 at wmconnect.com>; <R-390 at mailman.qth.net>
Sent: Sunday, May 11, 2008 2:16 PM
Subject: Re: [R-390] Offset gear source Pass_2


> All the thing does is keep the Veeder-Root counter in sync with the RF 
> deck gear train.
>
> It's not a big deal.  You set the RF deck to align all the cams, and set 
> the Veeder-Root counter to read the magic number....Can't ever remember 
> what it is for the R-390/URR...it's different from the "A".  Bolt the two 
> back together.
>
> The trickiest part is making sure you don't get the Band Switch shaft out 
> of sync.  If memory serves me correct it can end up in different places 
> each time the RF deck it rotated through alignment.  Meaning you can 
> rotate the gear train continuously in one direction and achieve alignment 
> of the cams but still have the Band Switch out of alignment.  You then 
> have to continue in the same direction and go around the world to come 
> back to alignment again and see where the band switch is.  I think it's 
> only an 180 degree thing so I think you have a 50/50 chance with it.  What 
> I did was took a spring loaded punch and put a dimple in the face of the 
> two drive gears on the rear of the RF deck where the teeth mesh with 
> everything in alignment on disassembly and that way you just get the cams 
> in alignment, make sure the dimples align, bolt the Veeder-Root counter on 
> with the magic numbers displayed and you are done.
>
> No green gear needed.
>
> I fretted about it at first too but learned quickly it was not really 
> necessary.
>
> Cecil Acuff
> K5DL
>
>
> ----- Original Message ----- 
> From: <Flowertime01 at wmconnect.com>
> To: <R-390 at mailman.qth.net>
> Sent: Sunday, May 11, 2008 1:26 PM
> Subject: Re: [R-390] Offset gear source Pass_2
>
>
>> Fellows.
>>
>> Ed ask, Can anyone tell me where I can come up with the elusive green
>> (offset) gear for my R-390? Thanks in advance for any help. I really need 
>> to pull the
>> RF deck as part of a restoration project.
>>
>> Would someone again count the teeth and measure the size of that mystical
>> gear?
>>
>> We could then find a half dozen generic sources of a gear with the right
>> number of teeth and diameter. The center bore is not critical. We could 
>> find a
>> thick gear so the thickness is not critical. Then the guys who need these 
>> things
>> could get a gear that fits the needs for their maintenance work.
>>
>> Fellows have cut rubber washers and bolted these in to lock up the deck 
>> gears
>> for a maintenance procedure.
>>
>> How about some who has one of these R390 decks in hand doing a write up 
>> as to
>> what that gear does for us when it is installed and the deck is pulled.
>>
>> Then we can write up a procedure to get a deck reset if you pull it 
>> without
>> the gear.
>>
>> I bet its all in the archives and we just need to get it pulled back to 
>> the
>> surface.
>>
>> Thanks
>>
>> Roger AI4NI
>>
>>
>>
>>
>>
>>   </HTML>
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