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Subject: [M]: LX 200 RA motor : uneven slew speed
From: Raymond Li
Reply To: mapug@shore.net
Date: Thu Jun 28 20:31:58 2001
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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.
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<DIV><FONT face=3DArial size=3D2>I have a new 10" f/10 LX200 for a =
about a year=20
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=20
motor is struggling to move when reached to a certain location for a =
spread of=20
10 degree. At that location, I saw the current drain changes =
from 4=20
to 6 LED bars in the LX200 panel and the motor sound a lot slower. =
Past=20
that spot, the RA motor will speed up again. Initially, I thought =
the=20
problem is that the scope is not well balanced but the problem occur =
even I get=20
the scope to point straight down to the ground. I have replace=20
the scope's motherboard myself when it was brand new due the =
scope's=20
computer was DOA but I didn't touch or replace the RA and DEC motors. =
>From the=20
meade repair instructions, there is a spring that hold the RA motor =
tight to the=20
RA worm wheel. A 1/8" space clearance must be reserve for the =
worm=20
wheel high and low spot. Could the problem be that the RA =
motor/worm=20
gear is mounted too tight to the worm wheel ? Does =
anyone have=20
notice similar experience with their scope ?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Any suggestion is greatly=20
welcome.</FONT></DIV></BODY></HTML>
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