Raymond,

I'll echo Maarten's comments. The centering of the worm wheel is never
going to be perfect and with my scope there is an area that seems to take
more current and that slows the slew a bit.

What I have done though is to find that area that slows the slew and make
sure its always away from the worm. By listening to the sound of the
motors, I slew in RA until I get to the slow area, then stop. I then slew
180 degrees in either direction and power off the scope. Then I loosen the
RA and DEC clutches, put the scope in home position (pointed at the
horizon, and aligned with the control pannel or 0 HA).

Now, when I set up my scope, before power up I always orient the scope to
the home position. Before I turn off the scope after observing, I SLEW the
scope to the home position before powering off.

This keeps the tight spot away from the worm, and slewing smooth and easy.
Its also a good idea to set the slew speed to a slower setting.

Happy trails...


At 11:31 PM 6/28/01 -0400, you wrote:
>>>>
I have a new 10" f/10 LX200 for a about a year now. I have noticed that my
scope's RA slew speed is not constant. In Alt-z mode, under high speed
slew, I have found that the RA motor is struggling to move when reached to
a certain location for a spread of 10 degree. At that location, I saw the
current drain changes from 4 to 6 LED bars in the LX200 panel and the motor
sound a lot slower. Past that spot, the RA motor will speed up again.
Initially, I thought the problem is that the scope is not well balanced but
the problem occur even I get the scope to point straight down to the
ground. I have replace the scope's motherboard myself when it was brand
new due the scope's computer was DOA but I didn't touch or replace the RA
and DEC motors. From the meade repair instructions, there is a spring that
hold the RA motor tight to the RA worm wheel. A 1/8" space clearance must
be reserve for the worm wheel high and low spot. Could the problem be
that the RA motor/worm gear is mounted too tight to the worm wheel ? Does
anyone have notice similar experience with their scope ?

Any suggestion is greatly welcome.

<<<<


------------------------------------------------
------------------------------------------------

View index by [date] [author] [subject]
Previous message: Re: [M]: OT: Mars is a mixed blessing, Gene Horr
Next message: Re: [M]: LX 200 RA motor : uneven slew speed, Larry Owens
Next message in thread: Re: [M]: LX 200 RA motor : uneven slew speed, Larry Owens
Previous message in thread: Re: [M]: LX 200 RA motor : uneven slew speed, Maarten Vanleenhove