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Proxxon rail revisited

 
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NikonUser



Joined: 04 Sep 2008
Posts: 2577
Location: southern New Brunswick, Canada

PostPosted: Thu Oct 27, 2011 7:34 pm    Post subject: Proxxon rail revisited Reply with quote

My 1st horizontal set-up was based on a Proxxon rail. However, I soon replaced it with a Nikon focus block.
1 revolution of the control dial on the Proxxon advances the stage 1.0 mm, whereas on my model of the Nikon block 1 revolution advances the stage 0.1 mm. With the large 6" control dial (see top image) I can move the Proxxon stage in increments of 10µ which is plenty fine enough for up to 10x.
One excellent feature of the Proxxon is the ability to move the stage right-left as well as front-back.
I have always anchored my camera and moved the subject. Today I 'dug out' the Proxxon and used it to move the camera; and because of the ability to make fine adjustments to the right-left axis is was a simpler system than having to move the subject which was at the far end of the optical bench.

Despite looks, the system is stable. Proxon movement was smooth with apparently perfect alignment in that ZS-stacked images showed nice clean edges.

Top view: set-up
Bottom: a couple of test subjects (Polistes sp.) Top @ 0.5mm frames, bottom @ 0.25mm frames, head width 3.68mm

NU11140

NU11141
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NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives
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elf



Joined: 18 Nov 2007
Posts: 1386

PostPosted: Thu Oct 27, 2011 8:59 pm    Post subject: Reply with quote

It looks like you need one of these Smile


Have you tried shooting panoramas at 10x with it?
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NikonUser



Joined: 04 Sep 2008
Posts: 2577
Location: southern New Brunswick, Canada

PostPosted: Fri Oct 28, 2011 7:08 am    Post subject: Reply with quote

I'm confused.
By "shooting panoramas" do you mean rotating the axis between camera and specimen? I have no way to accurately rotate the specimen but I could move the camera right-left to get different angles but don't know how I would process the resulting stack.

The disc detail is nice but what I really need is one divided into 10, 5, and 1 divisions.
Easy to divide a circle into 2, 4, 8, 16 divisions but not so easy, by hand, to make one based on divisions of 10.

EDIT: Thanks to the kindness and skill of a PMG.net member I now have a 6" disc with divisions based on 10
_________________
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives
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elf



Joined: 18 Nov 2007
Posts: 1386

PostPosted: Sat Oct 29, 2011 2:04 am    Post subject: Reply with quote

I thought perhaps 16 divisions worked out well for your favorite magnification Think

You should be able to do three image panos successfully by shifting left and right.


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NikonUser



Joined: 04 Sep 2008
Posts: 2577
Location: southern New Brunswick, Canada

PostPosted: Sun Oct 30, 2011 5:01 am    Post subject: Reply with quote

Wow, that's really nice - thanks elf.

I will make a disc to fit on my Nikon focus block, the one that is geared for 1µ increments.
_________________
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives
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ChrisR
Site Admin


Joined: 14 Mar 2009
Posts: 8495
Location: Near London, UK

PostPosted: Sun Oct 30, 2011 8:19 am    Post subject: Reply with quote

I don't understand how to use that vernier scale.
Its markings are outwith my ken, as Betty's Rab would say.
I expected its 10th tick to line up with the 9th or 11th, or 20th to line up with 19th etc etc

By pm Ed tells me this is the "larger" style.

I don't see it!



Perhaps working/posting as a .png or a .gif would avoid the compression spots?
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NikonUser



Joined: 04 Sep 2008
Posts: 2577
Location: southern New Brunswick, Canada

PostPosted: Sun Oct 30, 2011 8:55 am    Post subject: Reply with quote

Here is the elf disc attached to a Nikon focus block.
Disc is 6" diameter and gives easier control than Nikon's 2" diam knob.

This setup is at the opposite end of the optical bench; move this block with specimen for >10x , move the camera on the other end (previous image)
for <10x.

NU11142
_________________
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives
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View user's profile Send private message
elf



Joined: 18 Nov 2007
Posts: 1386

PostPosted: Sun Oct 30, 2011 10:45 am    Post subject: Reply with quote

ChrisR wrote:
I don't understand how to use that vernier scale.
Its markings are outwith my ken, as Betty's Rab would say.
I expected its 10th tick to line up with the 9th or 11th, or 20th to line up with 19th etc etc

By pm Ed tells me this is the "larger" style.

I don't see it!



Perhaps working/posting as a .png or a .gif would avoid the compression spots?


I stopped reading the instructions for creating a vernier scale too soon and missed the part where the direct vernier needs to span 9 marks on the dial and for a retrograde vernier it needs to span 11 marks. Embarassed

Here's the corrected version:
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ChrisR
Site Admin


Joined: 14 Mar 2009
Posts: 8495
Location: Near London, UK

PostPosted: Sun Oct 30, 2011 11:36 am    Post subject: Reply with quote

Now there's posh, and spotless too!
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