Re: [APML]: Ultima 8 drive

[ipper@juno.com (C B IPPER)]

On Fri, 18 Oct 1996 18:15:27 -0400 Mike Regish <mregish@village.yvv.com>
writes:
>
>
>>
>>I'm not familiar with the Ultima, but I've been doing some 
>experiments
>>on drive corrector circuits... One thing about synchronous motors is
>>that they require an RMS voltage proportional to frequency (which is
>>proportional to speed).  So if your voltage is just barely adequate 
>to
>>run the motor, then occasional dropping out at the highest speed is
>>the first symptom you'll notice.
>>
>>Notoriously, telescope drive circuits use lower than normal motor 
>voltage
>>in order to save battery power.
>>
>>So... Battery running down?
>>
>>-- 
>        Nope. Battery was brand new. I checked the drive today and the 
>high
>speed seems to be working fine. I wonder if there might be some kind 
>of
>circuit breakers or something...?
>
>
Hi Mike,  
  This condition is nothing new.   Oxidation on battery terminals 
prevents good current flows.   Also cold condition in the early mornings 
put a strain on many batteries too.   When this condition occurs, 
out of no where, I have found a good solution;  by simply adding an
additional battery source to your system.   Being hooked up separately,
in parallel to your existing system, it  also solves odd ST-4 guiding 
problems as well.   During these frustrating moments I have notice
it the most, when a supposedly good battery becomes history. 
Being  wired in together, nothing will be lost on your guiding or
tracking
setup's;  when you find it necessary to make the power changes.
I've used this on many drive systems and its worth the extra effort.
Hopefully this may be helpful......Carl Faulkner.