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Articulated arm for magnifying glass, camera, microscope?

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PekkaNF:
Actually I was concidering short piede of that kind of "joints", although I really just need one ball joint or a compas joint type thingy. I agree that for one setting that sort of solutuon is more elegant that arms and takes less space too.

Rest of the stuff pretty much should be one axis joints to allow fast and repeatable X-Y movements.

Pekka

PekkaNF:
There seem to very many mechanisms:
https://en.wikipedia.org/wiki/Balanced-arm_lamp

Tried to find inside out model of the parallelogram linkage, but I'm not finding he right catchphrase for that one.

Pekka

PekkaNF:
Bit more testing, now with gas strut and parallel arm linkage. Car parts store didn't have small eneough gas struts, 500 mm between pins, OD18 mm, and 350N of nominal force.

It did work, but I was counting gas srut to deliver no more than max. force and frictions to take up something like 30%. BS. Got too much force. It would work fine with taping machine....need something smaller.

I made this in couple of hours and did not pay very much attention to accuracy, It is ok, but linkage is somewhat sensitive and needs carefull construction. Better to get all holes straight and on right places.

Pekka

chipenter:
Search for Pantagraph arm .

Will_D:
Search for SteadyCam designs.

I always thought that the "SC" rigs that the sports video cameramen use were gyro stabilised like Segways (or on gunships) but apparently they are just balanced by springs and Newtons laws do the rest (Inertia)

Or am I wrong?

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