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Singularity-Free Kinematically Redundant Planar Parallel Mechanism

Posted by MechaBits 
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MechaBits
Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 03, 2019 12:53AM
interesting,

[www.youtube.com]
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Ohmarinus
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 03, 2019 02:31AM
This popped up in my recommendations two days ago! Haha.

http://www.marinusdebeer.nl/
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Dust
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 03, 2019 02:34AM
Owch, the kinematics of that hurt my head!
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MechaBits
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 03, 2019 10:23AM
it's a vid from 2015, perhaps it should go in the right section. These YT Recommendations are a pain when you want to something off piste, stuck in a conformation bias loop, the other day I wanted something new & hit trending....sorry I did it doesnt paint a great picture of the world.

Edited 1 time(s). Last edit at 12/03/2019 04:27PM by MechaBits.
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MKSA
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 03, 2019 10:45AM
Youtube recommended it to me along with mousetrapmonday vid smiling smiley

"A comical prototype doesn't mean a dumb idea is possible" (Thunderf00t)
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Ohmarinus
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 03, 2019 01:17PM
When you read the comments of that video you also see almost everyone says 'wow, great recommendation yootoob'. I guess it's suddenly picked up by the algorithm.

http://www.marinusdebeer.nl/
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VDX
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 03, 2019 03:13PM
... remembers me on this old thread (see the attached images) smoking smiley

[reprap.org]

Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]
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JoergS5
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 05, 2019 04:02AM
Quote
VDX
... remembers me on this old thread (see the attached images) smoking smiley

[reprap.org]

Interesting thread. The dissertation of Jungnickel is interesting about serial and parralel kinematics and about somehting which is called today Compliant Machanisms. I didn't know it is known for so long back to 2004.
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VDX
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 05, 2019 05:00AM
... hmmm ... I've seen paintings of other "scissor kinematics" in old books from 1920 or even older -- so not "totally new", but with modern manufacturing and driving methodes this is better suitable for some mechanical tasks or problematics ... especially when aiming on micro- and nano-mechanics smoking smiley

Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]
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VDX
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 05, 2019 05:32AM
... the manufacturing of such "monolithic parallel kinematics" for small to "micro" mechanics could be easy done with the "one-off" injection moulding methode, as presented here:

[reprap.org]


So some possibilities and options, if someone is interested in "low-cost DIY-nanotech" cool smiley

Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]
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JoergS5
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 05, 2019 05:38AM
Books and videos from Larry L. Howell about compliant mechanisms are interesting, especially for MEMS. I thought about using them for backlash free hinges in 3D printers. Hylite is an alternative (also a flex structure). With today's processing power one can calculate and optimize better than in the 1920s, and there are a lot of new materials.
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VDX
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 05, 2019 06:48AM
... we designed and built micro-grippers with "solid state hinges" even from glass!! - it's pretty elastic, if the hinge thickness is below some ten microns winking smiley

Here some of my slightly bigger plastic designs with solid state hinges:



Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]
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JoergS5
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 05, 2019 07:45AM
Interesting, thank you for the images. Your flexures are good for robotic grippers, I guess.

For 3D printers I thought about hinges with big possible degrees like in
[3dprint.com]
and
large stroke flexure hinge: [www.youtube.com]
or butterfly hinge: [www.youtube.com]

The calculation of the kinematics could be implemented in firmware.
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VDX
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 05, 2019 09:48AM
... yes - especially for "micro-assembly" on chip-level, for what most of them were designed for cool smiley

Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]
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MechaBits
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 09, 2019 11:05PM
this is cool mech

[www.youtube.com]
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VDX
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 10, 2019 02:14AM
... indeed! smileys with beer

Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]
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Ohmarinus
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 10, 2019 04:02AM
Quote
MechaBits
this is cool mech

[www.youtube.com]

Also came up in my recommendations four days ago. Are we sharing the same youtube account?

http://www.marinusdebeer.nl/
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MechaBits
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 10, 2019 09:24PM
Quote
Ohmarinus
Quote
MechaBits
Also came up in my recommendations four days ago. Are we sharing the same youtube account?

Being programmed by AI or Viktor I can't decide.
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VDX
Re: Singularity-Free Kinematically Redundant Planar Parallel Mechanism
December 11, 2019 04:20AM
... is there really a difference? smoking smiley

Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]
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