Also of potential interest is Chebyshev's "paradoxical" 6-bar linkage:
Understand 1,700 Mechanical Linkages with These Helpful Animations
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Re: Understand 1,700 Mechanical Linkages with These Helpful Animations
#62For those interested in these kind of mechanical things, Dover has republished some 19th and early 20th century public domain books that collected together mechanical movements. Some examples: "507 Mechanical Movements: Mechanisms and Devices" by Henry T. Brown, from 1868: http://www.amazon.com/507-Mechanical-Movements-Mechanisms-De... "1800 Mechanical Movements, Devices and Appliances" by Gardner D. Hiscox, first pu…
Since both of these are in the public domain, you can legally print your own copy, which is more convenient for some people. Google Books has scanned the 507 Mechanical Movements book, although their search engine is terrible at finding things like that on their own site; one copy is available from http://www.pdnotebook.com/wp-content/themes/thesis_16/custom... . The other, longer book is harder to find via HTTP, alt…
Looks like you can get "1800 Mechanical Movements, Devices and Appliances" by Gardner D. Hiscox at:
http://www.pdfarchive.info/pdf/H/Hi/Hiscox_Gardner_Dexter_-_...
Re: Understand 1,700 Mechanical Linkages with These Helpful Animations
#63Earlier quoted context omitted.
Since both of these are in the public domain, you can legally print your own copy, which is more convenient for some people. Google Books has scanned the 507 Mechanical Movements book, although their search engine is terrible at finding things like that on their own site; one copy is available from http://www.pdnotebook.com/wp-content/themes/thesis_16/custom... . The other, longer book is harder to find via HTTP, alt…
Looks like you can get "1800 Mechanical Movements, Devices and Appliances" by Gardner D. Hiscox at: http://www.pdfarchive.info/pdf/H/Hi/Hiscox_Gardner_Dexter_-_...
Thank you very much! What search engines do you use?
Re: Understand 1,700 Mechanical Linkages with These Helpful Animations
#64Earlier quoted context omitted.
This is certainly true in general. I see a niche for the mechanical solution if reliability is a primary goal and there is a (not too complex) gear that can solve your problem. About ten year ago I worked in project that designed a solar tracker. These trackers need to be cheap and reliable. Every hour an mechanic spends in a remote location is incredibly expensive and cuts into your yield very fast. Interestingly th…
Why are mechanical solutions more reliable than a servo ? Aren't mechanical and moving parts less reliable than electronics , in general ?
You can think of a mechanical solution as a straight line program with no conditionals. The servo solution has a feedback loop that will ultimately face an upset in the feedback loop, a broken sensor, worn brushes on the servo motor, over heated power transistors, etc. Both solutions will suffer from fatigue in the long term, but an active solution with electronics and a servo will suffer from a element failing and possibly causing the active solution to destroy itself.
Re: Understand 1,700 Mechanical Linkages with These Helpful Animations
#65Earlier quoted context omitted.
Looks like you can get "1800 Mechanical Movements, Devices and Appliances" by Gardner D. Hiscox at: http://www.pdfarchive.info/pdf/H/Hi/Hiscox_Gardner_Dexter_-_...
Thank you very much! What search engines do you use?
Just found it using Google. I think I had to end up quoting various parts of the title, adding "PDF" as part of the search, and going past the first couple of pages of search results.
Re: Understand 1,700 Mechanical Linkages with These Helpful Animations
#66Also of potential interest is Chebyshev's "paradoxical" 6-bar linkage: http://www.etudes.ru/en/etudes/paradox/
If I remember the catalog correctly, there are a number of Chebyshev linkages among Prof. Nguyen's videos, such as https://www.youtube.com/watch?v=xPVcL0fMBCk. I haven't found the paradoxical 6-bar linkage, though.
Re: Understand 1,700 Mechanical Linkages with These Helpful Animations
#67Very cool, no Theo Jansen linkage in it however.