Re: AO Spencer binocular head repair

"Kevin Cunningham" <smskjd@xxxxxxxxxxxxxx> wrote in
news:kq3Je.1565$Je.1330@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:

>
> "Dave Myers" <dave.myers@xxxxxxxxxxx> wrote in message
> news:Xns96A9D211E1B58davemyerscharternet@xxxxxxxxxxxxxxxx
>> Hello,
>>
>> I recently purchased a used AO Spencer binocular compound microscope
>> (model #
>> unknown). The interpupillary distance adjustment works smoothly, but
>> the left slide
>> that the eyepiece attaches to is loose. The result is double vision
>> if it isn't held
>> up manually. Does anyone know of an adjustment, or some way of
>> shimming this
>> mechanism to tighten it up? Or maybe a web page that could give me a
>> clue for
>> repairing. For now duct tape will have to do.
>>
>> Thanks,
>> Dave
>
> My guess is that this is an AO 10 head, right? If it is you need to
> remove the 4 screws that hold a plate where your nose goes. These are
> Bristol Splines, not all that common and after 40 years or so they are
> usually bonded to the head. Usually I have to cut a slot in the top
> of the screw and sometimes this doesn't work so I file the head until
> it's gone. Later replace the Bristol Splines with conventional
> screws.
>
> Remove the screws holding the optics to the head assembly. On the
> back side of this assembly you will see some screws. Remove all the
> screws, you might want to take some digital shots of this so you can
> remeber where things were.
>
> Clean all the parts with heptane in a clean, ventilated area or use
> acetone and alcohol. Relubricate with Dow-Corning 44 or similar, a
> light bodied synthetic. Now put it back together. When you put the
> screws in adjust the tension so it will slide back and forth but stop
> the eyepiece rocking you described.
>
> With all the tools and lubricants this is an at least two hour job.
> There is a 40% chance this is to worn so there is a chance that
> nothing will work.
>
> Give it a try or better yet contact a well trained microscope tech.
>
> Thanks,
>
> Kevin Cunningham
> SMS
>
>
>

Kevin,

Thanks very much for your detailed instructions. It will take me awhile
to gather the supplies, but I will definitely give it a shot. I don't see
a model number, but from pictures I have seen I think you are correct
calling it an AO 10. It was $99 + shipping on Ebay, so I knew it probably
had some problems.

Thanks again,
Dave
.

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