- Offizieller Beitrag
Hi Salvatore,
i mean the wrench as auxilary tool.
And i dont know any shop selling the hexagon spanner head with two pins in specific distance and specic diameters.
Perhaps you will find this shop.
Regards
Bernd
Hi Salvatore,
i mean the wrench as auxilary tool.
And i dont know any shop selling the hexagon spanner head with two pins in specific distance and specic diameters.
Perhaps you will find this shop.
Regards
Bernd
Hi Bernd,
I agree,
so please make a quotation, if you can build it for me.
Best regards,
Salvatore
Hi Salvatore,
you will get a quotation if you contact me via PN or mail. Or is there a problem?
Regards
Bernd
Hi Bernd,
absolutely not.
I will do it immediately.
Regards,
Salvatore
Yes, and it was not so difficult.
Regards
Bernd
By means of the suitable tool I could dismount the adapter for the objective revolver.
I found also that the adapter, despite the positioning pins, has some play, allowing small adjustments in the orientation.
So, by inserting a sheet of paper, just to test the feasibility of this procedure, I could align the center of field with the center of rotation of the table, almost perfectly (with an error of about one hundredth of a millimeter).
For a definitive and durable set up I will use aluminum foils.
Now I must face the next and most difficult problem: to free the stuck centering mechanism of the pol objectives.
I read on the web a very good descripion of the this task:
http://www.microscopy-uk.org.uk/mag/indexmag.h…eiss-polar.html
Since the procedure described looks a bit delicate for me not having much experience with micro mechanics, I would like to try a simple treatment with some Zippo fuel hoping it could soften the dried grease.
Can someone tell me if this solvent can affect the optics?
Thanks for any help!
Salvatore
Hi Bernd,
after a long time due to many reasons I am again here, with my Pol scope.
While I am trying to replicate the alignment reached in nov '17, I have another question:
Under the rotatable table there is a compound knob, made of two concentric knobs.
The larger and nearer to the table has a limited play, while the small concentric one can rotate without any limit.
Both have no effect on the rotation of the table, both in free rotating condition and when jumping through 45° stops.
What is the scope of these knobs? I imagine they could be used for rotating the table with the small knob, when the larger one
is in a given position, and in this case my system is somehow broken since it does not do enything.
Thanks in advance,
Salvatore
Hi Salvatore,
welcome back after this long time.
I know this problem and can show some pictures about the restauration in next days.
Regards
Bernd
The larger and nearer to the table has a limited play, while the small concentric one can rotate without any limit.
Both have no effect on the rotation of the table, both in free rotating condition and when jumping through 45° stops.
What is the scope of these knobs? I imagine they could be used for rotating the table with the small knob, when the larger one
is in a given position, and in this case my system is somehow broken since it does not do enything.
I think you mean this:
Yes, exactly.
From the second picture it seems to have a rubber band inside to provide adequate friction .
Perhaps mine has gone away.
Thanks anyway,
Salvatore
I experience some difficulty in aligning the rotation axis of the table with that of the straight tube with the uncenterable objective.
At the best the cross hair points to a point about half a millimeter from the table axis.
Since the pol objectives have centering rings, do you know if they can be made so excentric to compensate this situation?
Salvatore
Yes, of course!
Hi Bernd,
I need your wise help again!
After having partially centered the scope body, I tried to clean and relubricate the five objectives, starting from the lowest in power, that is the Plan 2.5x.
It was completely stuck and insensitive to my rotation efforts.
So I placed a few drops of Zippo fuel on the two centering rings, and after a while I came to the following situation, after unscrewing the small screws, the one on the conical part and the other in the color ring.
If I hold the objective by the black external part the upper ring rotates freely showing the eccentric movement of the optics.
The second ring, if the first is held firmly, moves also, but need some force and only for about 120 degrees, and seems rigidly bound to the optical tube.
In other terms, I cannot unscrew the conical part of the objective.
It seems that the conical part is somehow glued to the tube where the optica parts are fixed.
I do not dare to continue with solvents being afraid to induce some problems to the optical parts, like delamination.
Can you help me?
Thanks in advance!
(by the way I do not know how to put an image in this answer)
Hi Salvatore,
i know this problem. you will need a special tool to fix excentric rings from inside. Then you will can unscrew the two rings.
You can put an image in your answer if you click on field "Dateianhänge". Than click "Hochladen" and choose the image from your PC.
This images shows the prcedure:
Regards
Bernd
Bernd,
you are a living treasure of information!
Is the tool used to block the cylinder through holes A or B?
Thanks again!
Hi Salvatore,
B is correct. A is a window to unscrew the cylinder with optics (last picture bottom left).
Regards
Bernd
Hi Bernd,
I am sorry but I do not understand how to interact with such hole inside the external cylinder and directed perpendicularly to it.
Can you kindly tell me something more?
Thanks,
Salvatore
that is the Plan 2.5x.
Hallo Salvatore,
da du gerade dieses Objektiv in Bearbeitung hast, müßte leider auch noch der Linsensatz ausgebaut werden, anders als beim gezeigten Plan-Neofluar 25. Anders werden die Querbohrungen nicht zugänglich, um den Bolzen zum Gegenhalten für das Lösen der Ringe durchstecken zu können.
Es versteht sich von selbst, daß die Linsen in derselben Anordnung wieder eingesetzt werden müssen. Beim 10er Objektiv verhält sich das ähnlich, nur bei den Objektven mit Federung können die Linsen in der Hülsenfassung verbleiben. Über das Loch A wird für die Demontage und Montage die Bolzenschraube in der Längsführung zugänglich.
VG
Bernd
Hi Bernd,
I understand that I have to dismount the optical group, lens by lens, keeping trace of their relative position, before arriving to the centering cylinders.
The same precaution is recommended in the description of a similar task by some English people:
http://www.microscopy-uk.org.uk/mag/indexmag.h…eiss-polar.html
The problem is that the final conical part of the objective seems sealed to the cylinder that binds the lenses.
Thinking of some dry grease I tried to soften it with some eptane, and after some manipulations I could rotate the lower ring about 120° reative to the upper ring.
The upper ring on the contrary appeared to rotate freely with respect to the objective body.
I can try to insist with eptane (actually a Zippo fuel) but can it damage the optics?
Thanks,
Salvatore
I suggest: put an image to show your problem.
Regards
Bernd
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