Assignment

supply-side time management
parallel development,spiral development

Week 01

principles and practices, project management

Final Project Proposal

IME 0.1---Designed for Personal Manufacturing

Make almost anything on one machine:Designed for designer / artists / sicentist / students / community fablab and small enterprise. For prototype verification/small number of manufacturing .

On two sides there are two 4 degrees freedom robot arm, with machine vision which are used for:

3d printing for structure of things.

Milling PCB board for electronic prodution.

Putting tiny electronic componts on the PCB board.

Assemble all components and parts together.

Solding electronic components on the board.

Relpace workers on the production lines.

There are many advantage of using it:

Changing tools head automaticly.

Expanding to be a production line with many of them and work coordinately with each other.

Version control is a system that records changes to a file or set of files over time so that you can recall specific versions later. It allows you to revert files back to a previous state, revert the entire project back to a previous state, compare changes over time, see who last modified something that might be causing a problem, who introduced an issue and when, and more. Using a VCS also generally means that if you screw things up or lose files, you can easily recover. In addition, you get all this for very little overhead.

Local version control systems

Issue: It is easy to forget which directory you’re in and accidentally write to the wrong file or copy over files you don’t mean to.

Method: local VCSs that had a simple database that kept all the changes to files under revision control.

Disadvantage: Local VCS systems suffer from the problem – whenever you have the entire history of the project in a single place, you risk losing everything.

Centralized version control systems

Issue: people encounter is that they need to collaborate with developers on other systems

Methods: a single server that contains all the versioned files, and a number of clients that check out files from that central place

Advantage: Administrators have fine-grained control over who can do what; and it’s far easier to administer a CVCS than it is to deal with local databases on every client.

Disadvantage: If that server goes down for an hour, then during that hour nobody can collaborate at all or save versioned changes to anything they’re working on. If the hard disk the central database is on becomes corrupted, and proper backups haven’t been kept, you lose absolutely everything.

Distributed Version Control Systems

Issue: the same as disadvantage of cvcs

Methods: if any server dies, and these systems were collaborating via it, any of the client repositories can be copied back up to the server to restore it. Every clone is really a full backup of all the data.

More advantages: many of these systems deal pretty well with having several remote repositories they can work with, so you can collaborate with different groups of people in different ways simultaneously within the same project. This allows you to set up several types of workflows that aren’t possible in centralized systems, such as hierarchical models.

Using git in our personalweb developement

Step1: Download and install Git (downloadgit)

For this part , you have a lot instructions need to read：

Git book
Gitlab Doucment
Fab Academy 2016 Archive Instructions

Click here you can download git.

Step2: Register (fablabs.io login in)

After login account , you need to get into your email box to validate.Once you have your username of fablabs.io you should login on git.fabacademy.org by using fablabs.io credentials.

And then tell your gurus / instructors your user name.than he can add you to the group of your fablab.

Step3: Generate ssh keys

An ssk key allows you to establish a secure connection between your computer and GitLab. Before generating an SSH key in your shell.

What terminal I used is windows powershell, so.. I used command line below:

cat~/.ssh/id_rsa.pub // Check if your system already has one,if there is, then show it ,else tell user “no such files or directory”

ssh-keygen –t rsa –C “ $wxxxxx@126.com”// generate a new SSH key

cat~/.ssh/id_rsa.pub // show your public key on your terminal

Step4: Add public key to your account:

cat ~/.ssh/id_rsa.pub|clip //copy the ssh-key out to the clipboard of your computer.

then login in git.fabacademy.org and click the “Profile Setting”

Then click “SSH keys”

paste your SSH keys to “key” blank space.

After a few seconds your email was appeard under the Title box.

Click the button“Add key”below , then your SSH keys set sucessfully.

After that you will get email : SSH key was added to your account

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Step5:Push your Site to server

When you finish step 4, you need go back to your git terminal to finish the rest steps.

First, what you need to do is get into the file with which you want to put your repository. Here I want put the repository file in my D disk.

The commandline is : cd /d/

Then clone the repository of sever to your specify place of your computer.

The commandline is :git clone git@git.fabacademy.org:fabacademy201x/fablabxxxx.git.

thirdly:Put your webpage in your git repository : fablabxxx/student/id number/

and then next , add all new documents in the loacal repository The commandline is : git add . (Note: there is a space between “add” and “.”)

Fifth: write a meaningful commit message about the new vision of the repository

The commandline is :git commit –m “initial import”

Sixth: have the repository upload to the server

The commandline is : git push origin master

Personal website development

For this part, I have to say: it is not easy for me, I struggled here for several days, gradually I find some effective ways to deveplop simlpe website. Here are some useful sources I used:

W3school.com

Bootstap

Html handbook

Computer Aided Design

Week 02

Computer Aided Design

Assignment for this week

Vector Graphics vs Bitmap / Pixelmap / Raster / Graphics

Inkscape(2d designed)

OpenSCAD(Parametric design 2d 3d designed)

Solidworks (3d designed / Final project present)

Assignment for this week

Model (draw, render, animate, simulate, ...) a possible final project, and post it on your class page

Try out as many different software applications as you can

Vector Graphics vs Bitmap / Pixelmap / Raster / Graphics

Bitmap / Pixelmap / Raster Graphics

Pixels are the smallest controllable unit of a digital image. Bitmap / pixelmap images are made up a retangular grid of pixels..

Bitmaps images are comprised of mapped bits This means that the image information is stored as a series of values that are either zeros or ones. This gives a computer a way to store abinary image made up of black and white pixels..

Pixelmaps can store more than one bit (color) per pixel. In computer graphics the two terms are often used interchangeably.

The term "raster" is used to describe both bitmaps and pixelmaps and indicates that these graphics are resoultion dependent. If you resize a raster graphic to a larger size, the square pixels will become apparent.When discussing vector images vs. bitmap images, the terms pixemaps, bitmats, and raster graphics can be used interchangably.

Vector Graphics

Vector grapics are resolution independent. They are based on mathematical expressions and use points, lines, curves and polygons to represent images. Because they use mathmatical formulas, they can be resized, bent and stretched without losing resolution. Lines remain crisp and sharp when the size of the drawing is increased.

Inkscape(2d designed)

For 2d vector graphics part , I used Inkscape to finish my homework , the picture below is I made with inkscape:

OpenSCAD(Parametric design 2d & 3d designed)

OpenSCAD might be the application you are looking for when you are planning to create 3D models of machine parts but pretty sure is not what you are looking for when you are more interested in creating computer-animated movies.

OpenSCAD is not an interactive modeller. Instead it is something like a 3D-compiler that reads in a script file that describes the object and renders the 3D model from this script file.

OpenSCAD provides two main modelling techniques: First there is constructive solid geometry (aka CSG) and second there is extrusion of 2D outlines.

Solidworks (3d designed / Final project present)

Here I present my 3d model of my final project. I used solidworks to designed it.

Computer-Controlled Cutting

Week 03

Computer-Controlled Cutting

Assignment for this week

lasercutter

Assignment for this week

group assignment: make lasercutter test part(s), varying cutting settings and slot dimensions

individual assignment: cut something on the vinylcutter design, make, and document a parametric press-fit construction kit,accounting for the lasercutter kerf, which can be assembled in multiple ways

lasercutter

make group test parts

first ， our group make a lasercut test parts what we make is a comb with different clearances, because the thickness of the wood board is 2.4 mm, at last we found that it is also the best size for assemblling different parts together .

parameter design—design basic unit

after that what I did is using the parameter design tool openscad to make a basic part which can be assembled of kinds of shape, and then I used specific software for our laser to cut it out, here is the basic unit I made :

design basic unit with press-fit construction parts using solidworks

next I used solidworks and inkscape to design a anther kind of basic assemble unit with chamfer and press fit construction part on it. Then I used lasercutter to cut it out:

Site Building

Week 04

Project Description

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