Re: Strange LX200 tracking and PEC problems



On 17 Jul 2006 08:15:31 -0700, "samosmrke@xxxxxxxxx"
<samosmrke@xxxxxxxxx> wrote:

I was thinking... is it possible that the grease on the worm gear is
too old and it gets harder when temperature falls during the night and
so the telescope slows down?

Possible. The original grease used by Meade is horrible stuff. The first
order of business with any LX200 is replacing it with a good synthetic.
But even the bad grease shouldn't be stalling your drive until the
temperatures get down around -10°C or below. Is it that cold where you
are? If you are stalling, you should see it on the ammeter bars. During
normal operation only 2 or 3 should be lit. If most are lit, something
is wrong.

Another possibility, as you considered, is the encoders. The amplifier
circuit (right on the encoder board) has a pot to set the sensor gain.
If it is misadjusted, you could be getting some false pulses, or missing
some. That, too, could be temperature related. Have you tried tracking
tests in the morning, when the temperature is rising rather than
falling?

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com
.