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Which USB "microscope" for measurement / poor mans shadowgraph?
PekkaNF:
--- Quote from: ScroungerLee on December 03, 2012, 04:39:23 PM ---You can try this link
www.miketreth.mistral.co.uk/files/centrecam12.zip
I am on my iPad so I can't try it, but I think it works
Lee
--- End quote ---
Thank you. I tried it and almost gave up installing it to celeron/vista combo. When I gave up and pressed a wrong button, it proceed to install. After something like five trials.
Only USBcam available was this contraption, sometimes described as snake cam, but it seemed to work with AMCAP.
http://www.clasohlson.com/uk/USB-Inspection-Camera/Pr363804000
First picture is test setup
Then picture capture trough AMCAP
Same view from CentreCam (screenshot)
Same view with Olympus 850SW
Bottom line: This camera/light combination offers far less than 10x loupe or 3diopter magnifying lence.
Probably this is allready clear to everybody else, but I noticed that the object to be measured and calibration reference has to be very close to same level. I could not get even close to 0,1 mm accuracy with centrecam/snake cam combination, no matter how much I calibrated. But this cam has something to do with it.
I suspect that camera has to perpendicular to the sample and reference and manuals focus would be highly desirable, probably also one good magnification.
I have narrowed my choice down to two particular USB-microscope makes:
1) Dino-Lite, basic one (software looks good, many tutorials on YT)
2) Aven Mighty Scope (not so convinced if all that resolution is good honest noninterpolated bits, but software seems to make it possible to compare two images, eg. thread specimen and "ideal" thread form.)
Aven seems to be more open, anyone used mighty scope with skype? Or Dino-Lite?
Pekka
Fergus OMore:
Centrecam- I did issue more than a hint about problems with new versions of Windows.
Ah well :doh:
Norman
PekkaNF:
Yup. You did. I read. But had to try! I'm sure there is something in this cheap camera set-up that has to useful and I'm not going to leave no stone unturned until I'll fiqure out where it stops being viable.
I have been eyeballing Hemigways centering microscope kit. An alternative to it would be AV-camera just like above, but I need to figure out how much resolution/magnification is needed to center Mill/drill accurately.
I would very much like to have solution without too much complication, but if a PC or laptop is needed it must then provide something extra and not just sit there processor crunching something stupid and let me do all the work!
I think that most cost effective for measuremet would be to construct some sort of shadowgraph with 20x stereo microscope and micrometer movable stylys to measure objects on one axis. I could use this to inspect my lathe/milling tools and check grinding quality (with my present skill and equipment - lack of it!).
For centering I could build/modify led ring light and I would like rest of it be purely optical, but I have no skill needed to design/build one from scratch.....and I have given up finding one old in working order AND one that won't break my back&bank.
Young man has right to dream.
Pekka
Fergus OMore:
--- Quote from: PekkaNF on December 07, 2012, 03:01:35 PM ---
Young man has right to dream.
Pekka
--- End quote ---
Nope but kindly to you, young Sir and it is old men who dream dreams and have visions :doh:
So let an old man dream on and go back to yet an older man- none but Ned Westbury.
He wrote in many names and one was 'Geometer' and I believe that some of his Microscope on the Lathe articles is still on the net.
My dear old 'brother in arms' J.W.Early and I ran into all sorts of problems when we tried to get such articles onto the net. Maybe, someone can find them again or have the articles in Model Engineer in about 1963 and guessing Vol120.
Let me know how my memory is holding out.
Norm at--------------------82+
PekkaNF:
sumthing like this:
http://www.neme-s.org/Model_Engineer_Files/3219-Microscope%20on%20the%20Lathe%20%236.pdf
????
Pekka
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