[R-390] Re: [R-390A] Cam Synchronization

[wabate]

Roy and all,

Thanks for the replies.  I can understand starting with the 8-16 first 
but what do you do when you can't set that one?  If you read my first 
post I said, "If I try to align that cam with the KC shaft, I get to the 
end stop before it lines up."  So what do you do when you run out of KC 
change rotation?  That's the real question.  There has to be an 
adjustment somewhere.  In the 1956 manual it does say to adjust the 8-16 
cam first but it does not say how.  In the 1961 manual it ignores the 
sequence entirely.  It just states to adjust the cams.

I think it is somehow linked to the intermittent switch drive adjustment 
or the MC change shaft adjustment.  But I'm not sure.  Someone must have 
gone through this before.  Anyone?

Thanks,

Bill, K3PGB

Roy Morgan wrote:
> At 12:04 PM 9/18/2007, you wrote:
> 
>> Hi.  I'm working on a newly acquired 390A and I've started with the 
>> mechanical synchronization.  I've worked on 390A's before but this is 
>> the first that is slightly off sync. Four of the cams were off no more 
>> than 1/8" so I decided to touch it up.  The other two cams were OK.  I 
>> adjusted three but I'm stumped on the 8-16MC cam.  That cam does not 
>> have a non-mar clamp on it.  Its riveted to the gear.  How do you 
>> adjust that cam?
> 
> 
> 
> You DON'T.  You START with that one.. Set it to the correct spot. THEN 
> adjust the rest.  If the PTO or dial readout is wrong, then fix that 
> after setting the set of cams right.
> 
> I thought the manual  (or some manual) talked about that, but maybe not.
> 
> Roy
> 
> 
> 
> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing
> 13033 Downey Mill Road, Lovettsville, VA 20180
> Phone 540-822-5911   Cell 301-928-7794
> Work: Voice: 301-975-3254,  Fax: 301-975-6097
> roy.morgan at nist.gov -- 
> 
> 
>