Intro – Physical Modelling for Electronics Enclosures using Rapid prototyping


Hello, I belong to the Indian Institute of
Science, and I am happy to share some of the knowledge and practices I have acquired over
a long time. The center department of Electronic Systems
Engineering was started at the ECE, and later on it was started as the center for Electronic
design and Technology, where the concentration was on making physical almost ready to produce
industrial prototypes. So in the beginning we were all concentrating
on 3 aspects of a product, one of the aspects of the product is think about it from the
top down approach saying what is the final function of the operator this thing. So for example I have here RF mic, so it has
3 power points very nicely how to do one of them is the design of the circuit. We are especially in the what I call the analytical
point of view circuit design has become relatively well understood. And if you give target specs people can make
a proper circuit, but physically when you want to realize it suddenly we discover there
are limitations. So we need to design all the non-electrical
parts surrounding it, that is how the whole concept of prototyping started. So now at one time if you can look at my slide
presented here you see here often somebody had to produce these parts which are generally
made by you have seen this it is only made by injection molding. Now that thing was such things were not possible
to be made in by hand or with the available known resources, you see here we have beautiful
industrial what I call looking prototypes, now this is where I feel your product I mean
this particular course it was godsend that we now have what is loosely called 3D printing. Actually, this 3D printing issue is more related
to how to make rapid prototyping, so that when production comes in place there are no
surprises, and we have the part exactly like that, and there is special part here, this
one is a holder for Fresnel lens. So this Fresnel lens holder has the advantage
of having any radius we like which we need to change frequently until we get the correct
thing. What is not known too much about the rapid
prototyping procedure is that well it looks easy to produce these parts tremendous amount
of design has to go into that. So I will now go to this one or two small
what I call prototypes. You see here product development process involves
prototyping is done throughout the development process in the concept development, system-level
design and so on like that. Down you see here this is Apple PowerBook,
this did not come in one day, people were doing it by hand, now it is possible for us
to happily do these things by using rapid prototyping. But the starting point of it is somebody has
to imagine the product in its intended use, so how these things come and finally you know
see there is a bit of little bit of CAD modeling. And this is done by solid works by I mean
we have all these things both from Simonds and this thing. So I just thought I will what I call help
you along a little by showing you things from the what I call internet also saying are there
design rules? See here what looks like see we have a beautiful
what you call design rules for 3D printing, this available on the internet there is no
problem. But then a lot of it rather tremendous amount
of it still things about how to detail these things, and it is not as if all the time 3D
printing is the same. So we have several things like fused deposit
modeling, stereo-lithography, selective laser sintering, material, binding, and then what
you call metal laser sintering and so on by which complicated objects can be produced. So using all these things in mind, now when
you try to produce parts like this often we end up with peculiarities which are different
from the original things which are not easily realizable. So my lecture I would like to invite you all
to have a look at these things, and I thought this one of the things you know, this one
you believe it is a 9 to 5 clock saying all of us just need to work smart from 9 to 5. And ever notice something the division between
the hours are in quarters, meaning I have a quarter to something and a quarter passed
so on like that saying, now this whole thing if you can think it, you can print it. And you are in I cannot say full business
you will not be making profit at least you will have a thing to show somebody, where
it helps most is when you want to talk with you peers or working with you in the group. Earlier it was almost over the old design,
like if you are an Electronics engineer you will try hard to make the best compact electronics,
and then when you tell them you see I want something I want something this is called
as cell phone and it is very easy. It has 6 antennas unbelievable like that nobody
would have thought we could have packed in 6 antennas, and as if it is not sufficient
we also have a camera then we have you know lighting, then we have also a camera here,
now the latest ones have two cameras at the back. All these while part of the electronics and
all is reasonably understood how to make an enclosure for it which is reliable is still
part art part practice part science. And this is where I feel this rapid prototyping
technique on how to generate these parts, and then how to present it to your colleagues,
who can know pack all the electronics into it and finally we are in touch with the world,
wherever I am I can call you back on various apps and there is no missed connections anymore
between the various facets of electronics what you call product design. So I will say welcome to the course and the
maximum people are benefited are the ones who have some access to the technology which
somehow I do not know how to get the what I call technology in the thing you will see
here. All of them only these are the people in a
way now I say it is makerbot are the people who started the saying I mean you did not
go anywhere sit at home do it. And you see here we can of course there is
a calibration device, it is not a copy thing is a scanner if you have a part you scan it,
and then I can clone myself in it. So we have all these beautiful pictures, and
then anything we want they can all be made I am sorry we can make anything we like with
it. But the core of it is just about the same,
we have here all this printing head and it is selectively is in fact to the extent that
you can probably modify any XY able to make it into a 3D printer. So this is the you know some students have
been working on it, and it is not as if the technology is all original, this is old. This one is what you call something which
prints negatives okay, so we have all these you know beautiful devices and all that. And then I am sure all of you would have played
with this car except you see the chassis, that chassis is made with a acrylic sheet
in which various slots are cut. This is very much possible for you, and the
whole thing is assembled in parts, right now it is very much possible for you to print
the whole thing and then even things like I think you know what is, it is taken from
a old floppy drive it is aluminum casting. So the thing is the rules for them but not
about the same, so thank you I feel if you join as you will benefit, you have an access
to machine directly on your desktop, alternatively right now you can post your file to somebody
via email or anything, and the printed part comes back, and depending on I mean how well
you are connected, if you send it on Friday while you enjoy the Friday evening for addressing,
Monday morning your job is delivered it is on your table and you can play with it. So small objects like this I do not know what
it is, right now it looks like just a stand, and then I have a pointer, and then I can
use it for you know doing anything like that I have some stylus here and then I will I
have a switch here, whole thing somebody has conceived it, now it can be on your table. So welcome to the lecture I expect that with
a little exposure from this course, and then after that when you go and try out your own
thing you will come out to be extremely useful. So thank you.

2 thoughts on “Intro – Physical Modelling for Electronics Enclosures using Rapid prototyping

  1. Placements ?? Are you real ?? Wrong Question at wrong place. Rapid prototyping for electronics enclosures means a guy is trying hard creating his dream product and at his completion stage. He is not doing it to get a job here. @Santosh kandhasamy98

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