Rennes, was the city of my
grandparents. It was a long time since I wanted to go and visit this city, but somehow never got the occasion. It is definitly a city worth more than a two days visit. I found it very charming, these little streets become very full of life.
On sunday morning it is very quiet and empty.
On sunday morning it is very quiet and empty.
A few weeks ago I was contacted by a
Nicolas Huchet, Bionico who was interested in developing a prosthetic hand
based on InMoov.
I had been already asked for a few other projects of this sort, but was a bit reluctant to go along. The main reason is because InMoov isn't conceived to be such device and could be a disappointment instead of something really helpful. It's all plastic, even if ABS can be used in many devices, once 3d printed it isn't has resistant as when it is injected. Also depending on how the hand is built and printed, the final product can be good or a bad.
I had been already asked for a few other projects of this sort, but was a bit reluctant to go along. The main reason is because InMoov isn't conceived to be such device and could be a disappointment instead of something really helpful. It's all plastic, even if ABS can be used in many devices, once 3d printed it isn't has resistant as when it is injected. Also depending on how the hand is built and printed, the final product can be good or a bad.
I did explain most of my reluctance to him, but still he was ready to go on with the project.
Following this I got contacted by
the LabFab of Rennes. As you maybe saw on youtube there is a InMoov
builder, called Brancante, who's been very involved into testing a
prosthetic with InMoov.
Putting them in contact was a logic
thing, and of course they shared their different results.
Region Bretagne organized this week-end
a big event pretty much like a MakerFaire. Imagine, Construis. Since
Nicolas Huchet was going to present his Open Source prosthetic
project during this event, Hugues du FabLab invited me to join them
for two days to present and work with them.
It was very interesting, I got to meet
a lot of people, some part of the projectand some others just
discovering it. During the event I did my first Round table based on
the OpenHardware subject in company of Nicolas Huchet. Other guests
were there, SnootLab, Mutable, John Lejeune, Jimmy P Rodgers.
Being most of the time a bear in it's
cave this was an interesting shot. Talking in a microphone to an
assembly of people is something. I guess with practice it becomes
easier with time.
Hughes had been, during the previous
days, working on a first prototype which was a real DIY hand with
cables and wires. I think somehow it made it even more interesting to
people because of it's intriguing appearance. Anyway the prosthetic was wired
with myo electric sensors, and we got to test it on Nicolas. And it
worked !
Of course the open close pattern
movement was very simple and was working with a bit of latency.
Nylon threads used by Hugues were
streatchable and thin, which didn't allow any grabing of things, but
think of it. The InMoov hand was printed in a few hours, then servos
were added with cables and then all wired to the Arduino with sensors
and that's it.
I think if we work and develloppe the
concept and design we can get a working Open source devise pretty
fast, and transformable to particular needs. Don't misunderstand me,
it's not going to be as good as the ILimb, but it can be very
helpfull for those who can't afford to pay 25 000 euros for a
prosthetic.
The Makerfaire Tour bus was in Rennes for the occasion, they did an interview about the project.
The Makerfaire Tour bus was in Rennes for the occasion, they did an interview about the project.
Since the Nederlands I hadn't posted
anything on my blog, because of a lack of time, but there has been a
lot of things going on around InMoov though.
The major one, is the implementation of
the i2C board in MyrobotLab by Grog. This is a major advancement
because now I can hook up 16 extra servos per i2C board added to the
Arduino.
So that means the eyes servos but also
the jaw, and next the dorsale, hips, legs, feet.
It has been a 100% worky on the first
test, Grog couldn't believe it
Then another test we did with Grog and
Alessandruino was to test remote controlling the robot through the
internet. Imagine this, Grog being in the US took control of the
InMoov gestures in my workshop in Paris France. Totally amazing to
see !!
We tried the same thing wth
Alessandruino but somehow it didn't work. I think we had too many
video instances working at the same time.
Next innovation, Jha in Australia has
been working on a script to make the jaw work as the robot speaks.
That's also cool ! Just uploading the python script into MRL and
the robots could repeat the prewrote sentence and having is jaw
working in accordance. It isn't perfect if you really focuse on the
jaw, but once you get other body movements at the same time it is
interesting. Some might see this as a bit uncanney. The script is
available on MRL and I will make it available on the download tab.
Another new and interesting happening
is, Leonardo from Italy who has been printing a super heroe InMoov :)
He has proposed to work on the transfer of the blog data to a real
site, so for that matter I bought the domain name:
InMoov.fr
Thanks to donators we will be able to host the site and create something more conventional for us.
InMoov.fr
Thanks to donators we will be able to host the site and create something more conventional for us.
Looking good, Gael! :-)
ReplyDeleteGreat update, can't wait to get my 3d printer soon and start building/adjusting things. :)
ReplyDeleteGreat !!!
ReplyDeleteWe had great moments in Rennes. Look at these 15 seconds of happyness : http://www.youtube.com/watch?v=FNd_xBt9crw Hope to see you soon !
ReplyDeleteI've been working on an industrial project where we needed both high speed and high force movement from a linear actuator - which is similar to one of the issues you mention with your finger.
ReplyDeleteWe have tried a number of solutions, the simplest being two motors. One a high torque gear-motor and the other direct drive connected together through a differential (constructed as a planetary gear set) then the two motors are connected electrically in series. The output of the differential (planetary sun gear) was connected to a ball-screw to give linear motion. In low torque situations, both motors run but the fast, low torque motor is dominant and the ball screw moves fast. When the torque increases, the fast motor slows and eventually stalls, delivering more current to the other motor and the differential allows it to move the ball screw slowly at high force.
Although this sounds complicated, and maybe too much so to incorporate into a finger, it does allow a balance of force & speed difficult to achieve otherwise!
On both motors, we used Cycloidial reductions which do not allow back-drive and are eminently 3D Printable!
chim lợn kêu báo điềm gì tớ đêm qua nó cứ đậu ở mái nhà mình và kêu 3 tiếng không biết điềm gì chứ nghe thấy sợ sợ và lo lo
ReplyDeletenuôi rùa trong nhà có tốt không ông bác mình đi công tác đem về cho cho rùa bảo nuôi nhưng mình không dám vì sợ linh thiêng, không biết đem lại điều xui gì không
gà trống đẻ trứng có điềm gì gà nhà mình đẻ liên tiếp 5 trứng luôn đấy
cho tru báo điềm gì âm thanh của tiếng chó trú là một sự việc báo hiệu cho một điềm chẳng lành sắp sửa xảy ra.
gà mái gáy là điềm báo gì có làm sao không
Very inspiring and helpful too.
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