Re: AP 900 GTO CP3 Dec Motor Stall and Worm Gear Adjustment?

Hank Sielski


Thanks! I think I'll try upgrading my battery before I start messing with
the worm gear adjustment. Do you think 35AH is big enough (just mount, no
camera/dew heater)?

If I still have trouble, I'll talk with Howard and Wally...



On Mon, Jul 7, 2008 at 4:42 PM, <chris1011@...> wrote:

In a message dated 7/7/2008 6:06:10 PM Central Daylight Time,
hsielski@... <> writes:

After about 4 or 5 hours of observing and slewing around, the Dec motor
stalled and the yellow light came on. I'm thinking that this may be due
my battery voltage getting low (I have one of the little Kendrick
that you used to sell) possibly combined with a slight "tightness" on the
worm gear mesh (since it always seems to be the Dec axis, and you recall
had a slight problem with this a couple of months ago).
Those batteries don't last very long. What you need is a big marine battery

from one of the big box stores. Cost is around $45 to $65, so it's not
expensive. Reason why it seems to stall when using Dec is that RA is always
running the mount in sidereal mode. When you add Dec, you are increasing
current draw because now both axes are drawing power. This may put it above
threshhold of the battery, where it then begins to die.


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