Search found 47 matches

by PrecisionInstruments
Sat Dec 26, 2020 3:24 am
Forum: Microscopes and optics
Topic: Leitz Orthoplan focus block disassembly docuemtation
Replies: 14
Views: 1168

Re: Leitz Orthoplan focus block disassembly docuemtation

Not a problem The wedges are captured by the upper 3mm hex bolts. They can be lowered or raised which will tilt the stage and condenser block back or forwards. If they aren’t set correct, not only will your stage be on an angle, but the condenser will also push the light path away from the centre op...
by PrecisionInstruments
Thu Dec 24, 2020 1:44 am
Forum: Microscopes and optics
Topic: Leitz head needing some work
Replies: 9
Views: 345

Re: Leitz head needing some work

Removing the center plate won’t reveal much, just the other sides of the dovetails. There should be four phillips head screws that you should see through the top of the photo port, these will remove the port. Yes, just removing the four (2 already visible, 2 under port) flat head screws will allow y...
by PrecisionInstruments
Wed Dec 23, 2020 11:11 pm
Forum: Microscopes and optics
Topic: Leitz head needing some work
Replies: 9
Views: 345

Re: Leitz head needing some work

That’s good news As expected, removing the photo tube will reveal two more flat head screws. Removing all four flat head screws will allow you to remove the prism assembly from the head box frame. You don’t have to remove the image path selector knob as that assembly will stay with the frame. Removi...
by PrecisionInstruments
Tue Dec 22, 2020 11:08 pm
Forum: Microscopes and optics
Topic: Leitz head needing some work
Replies: 9
Views: 345

Re: Leitz head needing some work

Are there two flat head screws on top of the head? If so, there will be two more under the camera port (port needs to be removed to access). The silver image path selector knob needs to be removed as well from memory, it’s on a spline and should just pull off. A picture of both top and bottom would ...
by PrecisionInstruments
Mon Dec 14, 2020 7:54 am
Forum: Microscopes and optics
Topic: Leitz Orthoplan focus block disassembly docuemtation
Replies: 14
Views: 1168

Re: Leitz Orthoplan focus block disassembly docuemtation

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by PrecisionInstruments
Mon Dec 14, 2020 7:35 am
Forum: Microscopes and optics
Topic: Leitz Orthoplan focus block disassembly docuemtation
Replies: 14
Views: 1168

Re: Leitz Orthoplan focus block disassembly docuemtation

Hi Fred, Regarding lubricants, I use only what the factory suggest. One of the original lubricants used is actually still available being Kluber Nontrop KR 291 (Leitz called it 410), it goes green and hard over time. I have to order it by the Kg, though that may due to my local distributor. Only a f...
by PrecisionInstruments
Tue Dec 08, 2020 11:31 am
Forum: Microscopes and optics
Topic: Leitz Orthoplan focus block disassembly docuemtation
Replies: 14
Views: 1168

Re: Leitz Orthoplan focus block disassembly docuemtation

The Orthoplan focus is extremely complex, rebuilding is something that takes lengths of training and supervising to become comfortable with. To remove the focus block, which is the Z-axis liner bear block along with coarse/fine focus system, there are 4x 3mm hex head screws. Removing this block will...
by PrecisionInstruments
Tue Dec 01, 2020 9:24 pm
Forum: Beginner's corner
Topic: Spot on FoV driving me insane
Replies: 30
Views: 1120

Re: Spot on FoV driving me insane

Does adjusting the height of the condenser take it in and out of focus? If so, most likely on mirror or lens close by to it
by PrecisionInstruments
Tue Dec 01, 2020 7:30 am
Forum: Beginner's corner
Topic: Australian Power Plug/ Adapter Use Question
Replies: 6
Views: 331

Re: Australian Power Plug/ Adapter Use Question

If you’re in Perth, I’ll fit an Aussie plug for you at no charge.
Is the instrument going to be rated for 240VAC 50Hz?
by PrecisionInstruments
Sun Nov 29, 2020 7:00 am
Forum: For forum members who want to buy and sell equipment
Topic: Selling Rare Leitz 1936 Polarization Microscope
Replies: 4
Views: 511

Re: Selling Rare Leitz 1936 Polarization Microscope

Beautiful scope!!
But has someone polished that stage? Ouch!!
by PrecisionInstruments
Wed Nov 11, 2020 9:37 pm
Forum: Microscopes and optics
Topic: So, will I get the optics clean (Wild drawing tube)?
Replies: 6
Views: 918

Re: So, will I get the optics clean (Wild drawing tube)?

If you place a picture up of the entire drawing tube from both above and below, I will annotate the image with arrows explains how it’s comes apart. They are quite simple.

It may take me a day or two to check back in though.
by PrecisionInstruments
Sun Nov 08, 2020 10:42 am
Forum: Microscopes and optics
Topic: Service of Vanox AH rotating stage
Replies: 12
Views: 1253

Re: Service of Vanox AH rotating stage

The BH2 rotatable stage is very simple. You would remove, or back off, the cantering screws AA849500. Then pull the stage against the spring pin AA695400, then tilt the rear of stage upwards and out. It’s possible the banks is the same though you may need to remove the lever that engages the 45* cli...
by PrecisionInstruments
Tue May 26, 2020 12:03 pm
Forum: Beginner's corner
Topic: Leitz Paperweight
Replies: 25
Views: 2025

Re: Leitz Paperweight

O.K. folks ... looks like it’s a School-day : https://www.researchgate.net/publication/261569975_In_vivo_assessment_by_Mach-Zehnder_double-beam_interferometry_of_the_invasive_force_exerted_by_the_Asian_soybean_rust_fungus_Phakopsora_pachyrhizi MichaelG. It looks like the lamp house on the back of t...
by PrecisionInstruments
Tue May 26, 2020 11:46 am
Forum: Illumination Techniques
Topic: Leitz Laborlux 12 darkfield filter
Replies: 4
Views: 912

Re: Leitz Laborlux 12 darkfield filter

I’m sorry, I have only just now noticed you have said it’s at the end of a long barrel, do you have a picture of it?
by PrecisionInstruments
Tue May 26, 2020 3:50 am
Forum: Illumination Techniques
Topic: Leitz Laborlux 12 darkfield filter
Replies: 4
Views: 912

Re: Leitz Laborlux 12 darkfield filter

Does your condenser have a slot on the right side similar to this picture?
A7F27ABC-1327-4550-87C2-E6FEC7237995.jpeg
A7F27ABC-1327-4550-87C2-E6FEC7237995.jpeg (168.2 KiB) Viewed 861 times
by PrecisionInstruments
Thu May 14, 2020 11:14 am
Forum: Microscopes and optics
Topic: Olympus CX31 stuck objective
Replies: 9
Views: 1357

Re: Olympus CX31 stuck objective

If you are referring to the X & Y linear bearings, I do not bother disassembling them. I do flush the old lubricant out and replace with new by feeding in from ends. Racking the stage back and forth will drag it in, you only need a very small amount. I do take the controls apart for replacing lubric...
by PrecisionInstruments
Tue May 12, 2020 11:08 pm
Forum: Microscopes and optics
Topic: Olympus CX31 stuck objective
Replies: 9
Views: 1357

Re: Olympus CX31 stuck objective

Central screw is standard thread, though plenty of factory lock tight applied. The screw is easily damaged when trying to undo, unless plenty of heat by flame has been applied. The whole top arm is required to be replaced if screw gets damaged.
by PrecisionInstruments
Fri Mar 20, 2020 1:55 am
Forum: Collecting microscopes and slides
Topic: Recommend grease?
Replies: 53
Views: 29715

Re: Recommend grease?

No need to apologise mate, I didn’t think anything of it.
According to the misses, My written txt is sometimes abrupt sorry. I call it factual ;)
by PrecisionInstruments
Thu Mar 19, 2020 9:00 am
Forum: Collecting microscopes and slides
Topic: Recommend grease?
Replies: 53
Views: 29715

Re: Recommend grease?

The price is not unreasonable for 1kg ... if you are likely to use most of it ... I wonder whether that 24month shelf-life is real, or just convenient [?] There should be a good market for 50g pots or tubes of it if someone was prepared to produce them. MichaelG. I have seen it give no problems wit...
by PrecisionInstruments
Thu Mar 19, 2020 7:05 am
Forum: Collecting microscopes and slides
Topic: Recommend grease?
Replies: 53
Views: 29715

Re: Recommend grease?

[/quote] and the price disclosed :o [/quote] I paid $430AUD for 1Kg, though that was through possibly a number of hands before I saw it. For the two stages, I would expect you would use 1-2grams. I mentioned that you can get it directly through Kluber, which is incorrect sorry. I had to go through l...
by PrecisionInstruments
Wed Mar 18, 2020 12:51 pm
Forum: Collecting microscopes and slides
Topic: Recommend grease?
Replies: 53
Views: 29715

Re: Recommend grease?

A very interesting discussion! I am in the process of reviving two gliding stages for stereos, a Wild and a Leica. The Wild one was absolutely and completely stuck while the Leica one barely moves when considerable force is exerted. If these stages are the round type containing the 120mm stage plat...
by PrecisionInstruments
Fri Feb 07, 2020 1:26 pm
Forum: Microscopes and optics
Topic: 23.2 vs 30mm
Replies: 38
Views: 9803

Re: 23.2 vs 30mm

Only downside to larger field of view is brightness. Not as bright, though may not be an issue in most circumstances.
Older fluorescence microscopes using only 50W mercury lamp had small f.o.v eyepiece to get good signal from specimen.
by PrecisionInstruments
Sun Feb 02, 2020 5:31 am
Forum: My microscope
Topic: Olympus BX60F
Replies: 22
Views: 9633

Re: Olympus BX60F

Hi Zero, The 1512 is a great instrument that will stand the length of time, if not having done so already. Leica’s 410 is Kluber Nontrop KR 291. This is used on the knife holder bed, as well as the vertical dovetail type bearing. There are rubber pads used in these bearing surfaces that you have to ...
by PrecisionInstruments
Thu Jan 30, 2020 2:17 pm
Forum: Microscopes and optics
Topic: Test to verify a second hand microscope
Replies: 5
Views: 1603

Re: Test to verify a second hand microscope

Typical signs of DMLS that could be an issue:
- binocular head IPD unable to be adjusted/tight due to old lubricant
- focus being seized due to old lubricant

Both hopefully being not the case if being nicely serviced.
by PrecisionInstruments
Wed Jan 15, 2020 1:00 am
Forum: Microscopes and optics
Topic: BH-2 Focus adjustment question
Replies: 16
Views: 1876

Re: BH-2 Focus adjustment question

I would not suggest to use lubricant from a spray can, the propellant can cause damage to the metal parts. I have only ever used Olympus and Leica original lubricant so am unsure of what else can be used which is readily available, maybe Black molykote? With the gear box in place, and the fine focus...
by PrecisionInstruments
Tue Jan 14, 2020 2:02 pm
Forum: Microscopes and optics
Topic: BH-2 Focus adjustment question
Replies: 16
Views: 1876

Re: BH-2 Focus adjustment question

Not a problem. It’s great that the gear box in intact and teeth have been stripped. I have only one original box left, and have had to machine up the gear that normally strips. It is possible that the nylon gear in the planetary gear box has become defective. Luckily, the newer BX 1&2 series use the...
by PrecisionInstruments
Tue Jan 14, 2020 1:07 pm
Forum: Microscopes and optics
Topic: BH-2 Focus adjustment question
Replies: 16
Views: 1876

Re: BH-2 Focus adjustment question

Forgot to mention, When reinstalling the gearbox, be careful to have the teeth mesh with the rack correctly (not on top of each other). Have the 2.5mm Allen screws slight loose, lift the focus block (or stage) up ever so slightly then tighten the screws. Sometimes the coarse focus can feel lumpy if ...
by PrecisionInstruments
Tue Jan 14, 2020 12:55 pm
Forum: Microscopes and optics
Topic: BH-2 Focus adjustment question
Replies: 16
Views: 1876

Re: BH-2 Focus adjustment question

Sometimes shims have not been applied. Depending on the backlash between gear box and rack which you can now see, some maybe applied to take up the excess slack. There should always be a small amount of play though. The lubricant in the gear box looks like it requires replacing. It should spin quite...
by PrecisionInstruments
Mon Jan 13, 2020 11:42 am
Forum: Microscopes and optics
Topic: BH-2 Focus adjustment question
Replies: 16
Views: 1876

Re: BH-2 Focus adjustment question

A tight fitting pin punch works well, or a 3mm Allen key. The lubricant would have become dry, gluing the collar in place. There is also a gear box in the back of the stand, behind the panel on rear of stand held on by four small Phillips screws, which will most likely be seized up as well. The gear...