Junior Member
Optical Comparator
Looking for a used optical comparator. Would prefer either a bench top or floor model up to about 14". Am looking to spend about $2000. Lots on Ebay, but anything good going for 4000 +. Have seen some nice units go at auction for under 2000$. Any suggestions on places to look?
Senior Member
I got pretty good service out of my 10" Micro Vu a minimalist comparator consisting of a fiberglass enclosure optic, screen, and an aluminum 3 axis stage. I used it for tool profile, snall part inspecition. Measurement is via two travel indicators and the screen protractor.
Just biught a 12" Micro Vu same config but w/o stage attachhments for $310 off ebay. I need to get a different screen for it. They're availabl for $250 or so. Irony.
Before that I used parts from a slide projector on a bracket aimed past my mill table at a white panel with fish line stretched to make crosshairs. I used the mill table as a comparator stage. Of course this wouldn't work during daylight.
I don't know what your application is but maybe you're setting your sights too high.
Last edited by Forrest Addy; 07-26-2009 at 01:00 AM.
Junior Member
Well would like something with a DRO. Like the Mitutoyo 350 or 3500...missed a 3500 go for 1400$ at an auction recently.
Senior Member
If you are doing flat objects smaller than office paper, consider using a flatbed scanner. It can be easily calibrated using known objects and it will cost less thant $100.
Senior Member
I have one I would be glad to give you. It is a 14" (I think) Excello. Problem is you would need to pick it up. It weighs about a ton and is located in northeast Arkansas. Has a Heidenhein DRO with one damaged scale and the optics need cleaning.
Will scrap it soon if no one wants it.
Senior Member
How far Northeast? My In-laws live in Clarendon, and we're making a trip there next month...
"The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence."
Senior Member
Paragould.
It is on a skid in the garage, I have no way to move it except for a pinch bar.
Senior Member
Still available for a week or so. Ex-Cell-O Model 14-814.
Lazlo may not come to Arkansas before I have to scrap it.
Member
LazloOriginally Posted by lazlo
I can't comment on the condition of the offered Excello but I can vouch for the Excello shadowgraph in general. I used them or their predecessors (Kodak) for 50 years while in the trade. Every shop that I worked in had at least one, can be highly accurate if taken care of and will last a lifetime. It is especially versatile if it has the lens turret ,with all the lenses, and the vertical projection accessory.
Gene
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