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R: G11 Declination problem

Girolamo Gallo
 

Hello Paul!
I think you are right.
Scott is sending me a new worm bearing block that will allow more movement.
This will help to correct problem #1, but I am afraid that the major issue
is #2.
Do you have any suggestion to solve such a problem? I understand from the
list that the fix is not so easy.
So, I am thinking of asking my dealer (as soon as he is back from his
vacation) for replacing the whole dec assembly (the mount is only a few
weeks old). Maybe this will take some time, but at the moment I don't see
any other solution. What do you think?

Regards,
Girolamo

----- Original Message -----
From: Paul Sterngold <psterngold@...>
To: <Losmandy_users@...>
Sent: Tuesday, August 15, 2000 4:55 PM
Subject: Re: [Losmandy_users] G11 Declination problem


Welcome, Girolamo!

I suspect the play in your DEC shaft, and its inconsistency, is caused by
two things:

1) A small amount of play between the worm and the worm wheel (gear); and

2) A small amount of play between the DEC shaft and the shaft bearings.

#2 permits the shaft to be slightly off-center with regards to the axis.
Therefore, #1 can come and go as the worm wheel pushes more or less
against
the worm itself.

This is speculation, but there's been a lot of discussion recently on the
list regarding #2.

An alternative possibility, and one that I read about on the
Astrophotography Mail List (APML) about three years ago, is that the hold
in the center of the worm wheel itself is slightly larger than the shaft,
and therefore the worm wheel can be "locked" (via the clutch knob) in a
slightly eccentric position relative to the shaft.

I hope this helps.

Paul Sterngold

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