
Chinese: 
作為STEM教師，卡洛斯經常教學生用CAD軟件或3D打印來設計原創
但有時候為達目的，少不免用到逆向工程
例如使用3D掃瞄儀抄數
關於3D掃瞄，卡洛斯用過不同方法及不同機器
今天就著這課題和大家研究一下
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亦歡迎大家按讚及留言發問
剛才我們提及Reverse Engineering是什麼？
正向工程就是順著思路直達目標

English: 
As a STEM teacher, Carlos often teaches students to use CAD software or 3D printing to design original
But sometimes for the purpose, it is inevitable to use reverse engineering
For example, using a 3D scanner to read data
Regarding 3D scanning, Carlos has used different methods and different machines
Today I will study this topic with you
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Just now we mentioned what Reverse Engineering is?
Forward engineering is to follow the train of thought to reach the goal

Chinese: 
逆向工程難聽點說就是抄襲作品
也就是根據產品的外觀和功能，研究它的生產過程
同樣逆向流程可用在任何範疇
例如我媽媽嚐過一道菜，她可以在家裡一模一樣再做出來
而卡洛斯教音樂，也擁有聽完音樂之後模倣演奏的技能
這些都是逆向思維的例子
但在設計製作和電腦方面
似乎逆向思維就被定為侵犯版權舉動
當然若你一成不變盜用人家的作品
還比人更早推出謀利，那真是不對
但若正面去想，逆向工程是有一定價值的
例如你發現了似乎有人盜用你的設計
你也能用逆向思維去破解他的作品，證實是否抄襲自己的原作
回來談3D掃瞄儀
也稱抄數機，那就是把物件外觀讀數抄出的意思
卡洛斯曾用過不同方案抄數

English: 
The ugly thing about reverse engineering is plagiarism
That is to study its production process according to the appearance and function of the product
The same reverse process can be used in any category
For example, my mother has tried a dish, she can make it exactly at home
Carlos teaches music and has the ability to imitate performance after listening to music.
These are all examples of reverse thinking
But in terms of design and production
It seems that reverse thinking is considered copyright infringement
Of course if you keep stealing other people’s works
It’s not right to make profit earlier than people
But if you think positively, reverse engineering has some value
For example, you find that someone seems to have stolen your design
You can also use reverse thinking to decipher his work and verify whether you copied your original work
Come back to talk about 3D scanners
It is also called a copying machine, which means copying out the appearance of the object
Carlos has used different schemes to copy numbers

English: 
For example, I downloaded the project of Open source
Print and install 3D Scanner yourself
Also used Kinect of Xbox 360
With the turntable, all body portraits can be scanned
You can also take pictures in all directions
Combine models with software
However, the effects of these programs are not as good as professional scanners.
Today I will mainly introduce the Jeatech 3D scanner
I bought it two years ago
But the new products in the past two years have not applied any new technology
Just speed up
Today I mainly use it to introduce the scanning process
When will we use 3D scanning?
Maybe we want to improve a part on hand
But this part is very complicated and it takes time to draw with CAD

Chinese: 
例如我下載過Open source的project
再自己打印及裝嵌3D Scanner
也用過Xbox 360 的Kinect
配合轉盤，全身人像都可掃瞄
也可向著物件四方八面拍照
用軟件把模型組合出來
但這些方案的效果，怎樣也及不上專業的掃瞄儀
今天我主要介紹手上Jeatech 3D的掃瞄儀
已經是兩年前購入的
但這兩年間的新產品也沒應用什麼新技術
只是速度提升
今天主要用它介紹掃瞄的流程
什麼時候我們會用到3D掃瞄？
可能我們希望改良手上一個部件
但這部件很複雜，用CAD畫出很費時

English: 
Then you need to use reverse engineering, first scan and then change
More model lovers will scan their beloved dolls
Then 3D print
Like the virgin statue in my hand
It’s a holy artifact bought to me by a colleague in Italy
I hope to copy down the readings of this beautiful Madonna
I now demonstrate the program
First look at the equipment
This is a copying machine with blue light emitting from the middle and a lens on each side
Here is the slow turntable
The distance between the two is about 400-500mm
The copying machine is connected to the computer via USB and HDMI, and the power is also connected
And the turntable also has USB to connect to the computer
For the first scan, use a black and white checkerboard to calibrate

Chinese: 
那便要運用逆向工程，先掃瞄後條改
更多模型愛好者會把心愛的玩偶掃瞄
然後3D打印
像我手上這聖母像
是一個同事在意大利購入送給我的聖物
我希望把這漂亮聖母像的讀數抄下
我現在示範程序
先看看設備
這是抄數機，中間射出藍光，兩邊各有一鏡頭
這邊是慢速轉盤
兩者約相距400-500mm
抄數機以USB及HDMI和電腦連接，另接電
 而轉盤亦有USB接去電腦
第一次掃瞄，要使用黑白棋盤來校正

Chinese: 
打開掃瞄軟件，按Connect
連接好按Calibration
看到轉盤緩緩兩邊轉動
現在以5倍速度播放，實則很慢
校正好了，便可掃瞄
準備好聖母像
聖母像不難掃瞄
因為底部是平的
可以豎著放在轉盤
用全自動方法掃瞄便行
不規則的物件，便要用其他高級的方法
先按Scan，再按New
選物件的深淺度，聖母像是淺色的，選Light
在這裡可選Free Scan

English: 
Open the scanning software and press Connect
Connected and press Calibration
See the turntable slowly turning on both sides
Now playing at 5x speed, it’s actually very slow
After calibration, you can scan
Ready for the Virgin
The Virgin is easy to scan
Because the bottom is flat
Can be placed vertically on the turntable
Scan with fully automatic method
Irregular objects need to use other advanced methods
Press Scan first, then press New
Choose the depth of the object, the Virgin is light, choose Light
Optional Free Scan here

Chinese: 
全自動應選Rotary Scanning
為了精密一些，Scan Times我選了36次(每轉十度掃瞄一次)
其實36次很花時，一般十次都夠了
我在用20倍速度播放
轉盤每轉十度，藍光射向聖母像
兩邊鏡頭讀入反射光
便能建構立體模型
最後36次的讀數會拼合一起
聖母像沒有什麼隱蔽的細節，旋轉一周便夠了
不需用到其他拼合的功能便已成形

English: 
Automatically choose Rotary Scanning
In order to be more precise, I chose 36 Scan Times (one scan every ten degrees)
Actually 36 times are very expensive, usually ten times are enough
I am playing at 20x speed
Every ten degrees of the turntable, blue light shoots towards the statue of the Virgin
Both sides of the lens read the reflected light
Three-dimensional model
The last 36 readings will be stitched together
The statue of the Virgin has no hidden details, just one revolution is enough
No need to use other splicing functions to take shape

Chinese: 
只有頭頂一片是讀不到的
按Fusion便可填補細節
若物件的隱蔽及棱角較多，便要用Free Scan
下次再拍影片介紹
經過一輪Data Process
所有的洞都填補了
我們可以把成果存成.stl
如常進行3D打印
補充一點，喜歡玩figure的都不甘用FDM打印
即使設每層0.1mm，紋理都仍看到
光固化打印是更好的選擇
光固化的原理是使用液態樹脂
用光線把它固化

English: 
Only the top of the head can’t be read
Press Fusion to fill in the details
If the object is more concealed and has more edges and corners, use Free Scan
I'll make a video introduction next time
After a round of Data Process
All the holes are filled
We can save the results as .stl
3D printing as usual
One thing to add, those who like to play figure are not willing to use FDM printing
Even if each layer is 0.1mm, the texture can still be seen
Light curing printing is a better choice
The principle of light curing is to use liquid resin
Curing it with light

Chinese: 
一般稱為SLA(Stereo Lithography Apparatus)打印機
我這部是LED打印機
這類打印機使用很麻煩
原材料要在暗黑地方保存
不能見光，見光便硬化
只打印一件，倒一點原料出來又怕不夠
倒多了，用不完又要倒回樽裡
打印出來的物件表面濕漉漉
還要經過酒精清洗，照紫外光等步驟
工作中滿手黏膩，事後要清潔，非常麻煩
卡洛斯不是模型發燒友，很少用這打印機
它的切片軟件和Cura很類似，切片完按Play便打印

English: 
Generally called SLA (Stereo Lithography Apparatus) printer
This is an LED printer
This type of printer is troublesome to use
The raw materials should be kept in a dark place
Can't see the light, it hardens after seeing the light
Only print one piece, and pour some raw materials, but I’m afraid it’s not enough
Pour too much, I have to pour it back in the bottle
The surface of the printed object is wet
Also go through the steps of alcohol cleaning and ultraviolet light
Hands are sticky at work, clean afterwards, very troublesome
Carlos is not a model enthusiast and rarely uses this printer
Its slicing software is very similar to Cura. After slicing, press Play to print

English: 
When printing, the chassis is raised upside down, and the printing is completed when it is fully raised
If you want to know more about light curing printers
You can leave a message to let me know
Carlos can make a special video introduction
After this episode, I hope everyone understands reverse engineering
Also know the 3D scanning procedure
And know how to use 3D scanners to copy products
I hope everyone uses reverse thinking positively
Take yourself to the next level in design and production
If you like the video, please like and leave a comment

Chinese: 
打印的時候，底盤倒豎著升上來，完全升上來便打印完
各位若想多了解光固化打印機
可以隨便留言讓我知道
卡洛斯可以專門拍一影片介紹
經過今集希望大家了解逆向工程
也清楚3D掃瞄的程序
及知道如何用3D掃瞄器去複制產品
希望大家正面運用逆向思維
令自己在設計及製作更上一層樓
喜歡影片的請加讚及留言
