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Subject: Re: [M]: LX200: Ball bearing focuser upgrade.
From: Paul Luckas
Reply To: mapug@shore.net
Date: Tue Jun 26 00:04:34 2001
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Re: [M]: LX200: Ball bearing focuser upgrade.Do you mean the pivot ? If =
so, then yes, I thought about this, but was worried that shimming it up =
would reduce the amount of free movement it has to slide along the pin. =
I would imagine that it needs this to allow for the fact that everything =
is unlikely to be perfectly square as the mirror moves up and down the =
baffle.
----- Original Message -----=20
From: Robert Preston=20
Sent: Tuesday, June 26, 2001 12:54 PM
Subject: Re: [M]: LX200: Ball bearing focuser upgrade.
Greetings,
=20
I've just completed an upgrade to my LX200 focuser assembly using =
the method outlined by Michael Hart in the Mapug archives.
=20
Congrats!
=20
I still have about 1/4 of turn of backlash - despite no observable =
movement in the focus knob assembly. The left over backlash is probably =
a result of less than perfect screw threads, or maybe associated with =
the several arc minute mirror shift that I have on my 10" LX200.
=20
Could the remaining bit of backlash result from space between the =
focusser screw device and the arm that actually
moves the mirror ? If so, that space could be eliminated, I would =
think.
RP
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<HTML><HEAD><TITLE>Re: [M]: LX200: Ball bearing focuser upgrade.</TITLE>
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<DIV><FONT face=3DArial size=3D2>Do you mean the pivot ? If so, then =
yes, I thought=20
about this, but was worried that shimming it up would reduce the amount =
of free=20
movement it has to slide along the pin. I would imagine that it needs =
this to=20
allow for the fact that everything is unlikely to be perfectly square as =
the=20
mirror moves up and down the baffle.</FONT></DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
Preston</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, June 26, 2001 =
12:54=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: [M]: LX200: Ball =
bearing=20
focuser upgrade.</DIV>
<DIV><BR></DIV>
<BLOCKQUOTE><FONT size=3D2><FONT=20
face=3DArial>Greetings,<BR></FONT></FONT> <BR><FONT =
size=3D2><FONT=20
face=3DArial>I've just completed an upgrade to my LX200 focuser =
assembly using=20
the method outlined by Michael Hart in the Mapug=20
archives.<BR></FONT></FONT> <BR><FONT size=3D2><FONT=20
face=3DArial>Congrats!<BR></FONT></FONT> <BR><FONT =
size=3D2><FONT=20
face=3DArial>I still have about 1/4 of turn of backlash - despite no =
observable movement in the focus knob assembly. The left over =
backlash is=20
probably a result of less than perfect screw threads, or maybe =
associated=20
with the several arc minute mirror shift that I have on my 10"=20
LX200.<BR></FONT></FONT> <BR><FONT size=3D2><FONT =
face=3DArial><BR>Could=20
the remaining bit of backlash result from space between the focusser =
screw=20
device and the arm that actually<BR>moves the mirror ? If so, =
that=20
space could be eliminated, I would=20
=
think.<BR><BR>RP<BR><BR></FONT></FONT><BR><BR></BLOCKQUOTE><BR></BLOCKQUO=
TE></BODY></HTML>
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