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Good deal for microscope base

 
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anoldsole



Joined: 27 Feb 2018
Posts: 23

PostPosted: Mon Apr 16, 2018 11:51 am    Post subject: Good deal for microscope base Reply with quote

Not my auction, just noticed a good deal on a nikon MM base if someone wants to add some weight to their setup to get rid of those pesky vibrations Very Happy. $125 with $85 shipping.

https://www.ebay.com/itm/Nikon-UM2-Measurescope-main-base-w-transillumination-lighting-vertical-stages/352328423960?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D51376%26meid%3Db9046f760b5c41728cd623c7ed009775%26pid%3D100675%26rk%3D1%26rkt%3D15%26sd%3D252429194163%26itm%3D352328423960&_trksid=p2481888.c100675.m4236&_trkparms=pageci%3Aa04960bb-41a6-11e8-aa4a-74dbd180916a%7Cparentrq%3Acfc89ee51620a991c19e4c53fff4f266%7Ciid%3A1
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Lou Jost



Joined: 04 Sep 2015
Posts: 2532
Location: Ecuador

PostPosted: Mon Apr 16, 2018 7:19 pm    Post subject: Reply with quote

Thank you for that! It is just what I was searching for. There was an earlier listing for one of these but the description said that the fine focus made a grinding noise, so I passed on it. This one on the other hand sounds good.
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Lou Jost



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PostPosted: Mon Apr 16, 2018 9:15 pm    Post subject: Reply with quote

Now comes the challenging part: how to stuff this into my airline luggage...
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ChrisR
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Joined: 14 Mar 2009
Posts: 7763
Location: Near London, UK

PostPosted: Tue Apr 17, 2018 12:35 pm    Post subject: Reply with quote

I don't know if you've seen one Lou, but keep a look out for the base which goes on those dovetails.
You usually get 50mm of micrometer x-y, and a rotating glass middle.
Only another 20kg or so.
There were simpler ones too.
If you see the one with fat encoders, they're 200mm/pi diameter; I'm sure you can work out what to do with that Wink.
They have complex electronics inside, they aren't simple quadrature encoders, to my eyes. I didn't get the counter part, but I doubt I'd use it.

I know nothing about the base illumination system, I've not come across a manual for the UM-2.
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lothman



Joined: 14 Feb 2009
Posts: 330
Location: Stuttgart/Germany

PostPosted: Wed Apr 18, 2018 9:16 am    Post subject: Reply with quote

as I looked at the first link I found those focus blocks

column only
https://www.ebay.com/itm/Stereo-Microscope-Rack-Pinion-Coaxial-Coarse-Fine-Focusing-Adjustable-Mechanism/182869704367?hash=item2a93e23eaf:g:qj4AAOSw~RVZ-Y1O

column with bracket
https://www.ebay.com/itm/Microscope-Rack-Pinion-Coarse-Fine-Focusing-Adjustable-Mechanism-Head-Holder/183153342204?hash=item2aa4ca36fc:g:OTAAAOSwD99avaIq
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Lou Jost



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PostPosted: Wed Apr 18, 2018 9:40 am    Post subject: Reply with quote

Those look nice! But I wonder, since they are for stereo microscopes, the fine focus might not be fine enough for focus stacking with high-magnification objectives?
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lothman



Joined: 14 Feb 2009
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PostPosted: Thu Apr 19, 2018 3:11 pm    Post subject: Reply with quote

Lou Jost wrote:
Those look nice! But I wonder, since they are for stereo microscopes, the fine focus might not be fine enough for focus stacking with high-magnification objectives?

they say 0,002mm on scale, that would be the same as Nikon focus blocks
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Photomicro



Joined: 12 Aug 2017
Posts: 33
Location: UK

PostPosted: Fri Apr 20, 2018 5:00 am    Post subject: Reply with quote

lothman wrote:
Lou Jost wrote:
Those look nice! But I wonder, since they are for stereo microscopes, the fine focus might not be fine enough for focus stacking with high-magnification objectives?

they say 0,002mm on scale, that would be the same as Nikon focus blocks



yes, exactly the same block as used on the Optiphot microscope. In this case, the focus block *behind* it gives a much bigger range of movement, but only coarse.
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anoldsole



Joined: 27 Feb 2018
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PostPosted: Sun Apr 22, 2018 6:06 pm    Post subject: My setup with a similar base Reply with quote

I actually use a very similar base, laid flat on it's back on a diy isolation table. I removed the optical head and attached a plate with a THK rail where the head was attached. I initially intended on using it vertically but the head wouldn't hold very much weight and had a habit of sliding down unexpectedly.

The X/Y tables pop up cheap sometimes and they are very easy to install. Did a quick search and found one actually (if I didn't have one i'd buy it!): https://www.ebay.com/itm/Nikon-37371-2-STAGE-X-Y-AXIS-POSITIONER/142630254201?hash=item21356cf679:g:YAIAAOSwk1haOTy~

Micrometer heads pop up cheap as well. Laying it down flat on it's back you will lose an axis of movement, but if you replace the stock springs with high tension versions, you can get that axis back if they are strong enough to pull up the stage. The springs need to be fairly strong - it's very heavy. Pretty much eliminates any vibrations. The coarse movement isn't accurate enough for high magnification, but it's useful for a quick & dirty stack with an mp-e at lower magnifications, or as a quick coarse movement with a ton of travel.
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Lou Jost



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PostPosted: Sun Apr 22, 2018 7:04 pm    Post subject: Reply with quote

Looks very nice. If I lived in the US I would buy it.
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