Fixing My G-11 Mount
so that it Tracks!
I had been working
all summer trying to get this mount polar aligned but no it would
The best I could do
is get it within 20 minutes any closer and it would just bounce
to some other distance anywhere between
10 to 40 minutes from
when I had just locked it down :( Having taken my
telescope in to mount a 80mm refractor on it.
I decided to bring
the mount inside to check out why I have been having so much trouble,
being new to astronomy I though it was me.
I got out my dial indicator
set it on the polar shaft and to my surprise it moved .015 inches.
Well here was a good reason
I couldn't polar align
the darn scope below are my fixes. The first thing I found was
that instead of using a tapered bearing
it was using needle
bearing shells without the hardened insert riding instead on the
center less ground stainless shaft.
These bearing were
the ones that were in the mount. The needle bearing on the right
was slopping on the axis shaft.
This was made for a
1.250 shaft but the shaft was 1.248 and the there was a lot more
than .002 slop!
The center picture
is the bottom thrush bearings and when the clutch was tightened
too much it make the mount cam.
(start stop motion)
These are the tapered
roller bearing that I will support the top and bottom of the axis
I moved the bolts that
held the top plate and made a new bearing cup to hold the new
On the right is the
old bearing cub and the left is the one I made.
The polar axis with
both bearing installed.
Now on to the dec axis
and to the spring loaded worm gears and then with any luck there
will be a lot less slop