diff --git a/docs/Weekly_Group_Assignments/week04.md b/docs/Weekly_Group_Assignments/week04.md
index a7d2fae55ba50ce217219323b90f356f6e8875c8..cbeaf4487f67b9ba925281ea2da1793c05199e55 100644
--- a/docs/Weekly_Group_Assignments/week04.md
+++ b/docs/Weekly_Group_Assignments/week04.md
@@ -1,61 +1,194 @@
 # 4. Electronics production
 
-This week I worked on defining my final project idea and started to getting used to the documentation process.
 
-## Research
+## Instruction
 
-"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
+**Group Assignment**
 
-> "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
+- characterize the design rules for your in-house PCB production process
+- extra credit: send a PCB out to a board house
 
-## Useful links
+**Individual Assignment**
 
-- [Jekyll](http://jekyll.org)
-- [Google](http://google.com)
-- [Markdown](https://en.wikipedia.org/wiki/Markdown)
+- [Here](https://fabacademy.org/2022/labs/kannai/students/yukiya-yamane/assignments/week05/)
 
-## Code Example
+## What I did in Week4
 
-Use the three backticks to separate code.
+1. Set up milling environment → In this page
+2. PCB Test production → In this page
+3. Design and Produce in-circuit programmer →Individual Page
 
-```
-// the setup function runs once when you press reset or power the board
-void setup() {
-  // initialize digital pin LED_BUILTIN as an output.
-  pinMode(LED_BUILTIN, OUTPUT);
-}
+## Group Assignment
 
-// the loop function runs over and over again forever
-void loop() {
-  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
-  delay(1000);                       // wait for a second
-  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
-  delay(1000);                       // wait for a second
-}
-```
+### The CNC machine  we used
 
-## Gallery
+**Genmitsu PROVerXL 4030**
 
-![](../images/sample-photo.jpg)
+![](../images/week04/Untitled.png)
 
-## Video
+| Title                       | Spec                |
+| --------------------------- | ------------------- |
+| Working area                | 400 x 300 x 110mm   |
+| Control Board Compatibility | GRBL 1.1h           |
+| Spindle                     | 300W 6A, 12,000 RPM |
+| Max speed                   | 2000mm/min          |
+| Accuracy                    | 0.1 mm              |
+| Overall Machine Size        | 641 x 755.5 x 580mm |
+| Machine Weight              | 26kg                |
+| Collet (in package)         | 1/8” Shank         |
 
-### From Vimeo
+### About Material
 
-<iframe src="https://player.vimeo.com/video/10048961" width="640" height="480" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
-<p><a href="https://vimeo.com/10048961">Sound Waves</a> from <a href="https://vimeo.com/radarboy">George Gally (Radarboy)</a> on <a href="https://vimeo.com">Vimeo</a>.</p>
+- Cut board / Paper phenol
+- [FR1](https://www.yodobashi.com/product/100000001004769460/)（Flame Retardant）
+    - FR grades are described by "FR-numbers". The numbers range from 1 to 5, with FR-5 being the grade with the highest flame resistance. The higher the number, the more flame-resistant it is.
+- Size: 100 x150 x1.6mm
+- Cu layer: 35um = 0.035mm
 
-### From Youtube
+![](../images/week04/Untitled%201.png)
 
-<iframe width="560" height="315" src="https://www.youtube.com/embed/jjNgJFemlC4" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
+### About Endmill
 
-## 3D Models
+- shank diameter :
+    - 1/8” = 3.17 mm
+- for traces
+    - 1/64” endmill
+        - = 0.396748 mm
+        - SE : single end
+        - 2FL : two flute
+        - Altin coated : Calico Aluminum Titanium Nitride is a hard coating that solves many tribological problems with components that can be coated at temperatures of 450°C - 475°C
+    - (alternative) V-bit 0.2mm 30deg
+        - Because of the V-shape, it is a little difficult to control in some cases.
+        - Cheaper than 1/64 endmill
 
-<div class="sketchfab-embed-wrapper"><iframe width="640" height="480" src="https://sketchfab.com/models/658c8f8a2f3042c3ad7bdedd83f1c915/embed" frameborder="0" allow="autoplay; fullscreen; vr" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>
+![](../images/week04/vbit.jpg)
 
-<p style="font-size: 13px; font-weight: normal; margin: 5px; color: #4A4A4A;">
-    <a href="https://sketchfab.com/models/658c8f8a2f3042c3ad7bdedd83f1c915?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Dita&#39;s Gown</a>
-    by <a href="https://sketchfab.com/francisbitontistudio?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Francis Bitonti Studio</a>
-    on <a href="https://sketchfab.com?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Sketchfab</a>
-</p>
-</div>
+- for outline
+    - 1/32” endmill
+        - = 0.79375 mm
+        - SE / 2FL / Altin Coated
+    - (alternative) 0.7 mm
+
+![](../images/week04/endmill.jpg)
+
+![](../images/week04/Untitled%202.png)
+
+[source](https://docs.carbide3d.com/tutorials/tutorial-tooling/)
+
+### About CAM and Machine
+
+- Build an environment to implement this that will be completed on my own PC.
+- Fusion → Mods → g sender → Genmitsu PRO Ver XL
+
+![](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_10.48.34.png)
+
+- [Mods](https://mods.cba.mit.edu/)
+
+### Set up milling environment
+
+- Install [CH340 Driver](https://learn.sparkfun.com/tutorials/how-to-install-ch340-drivers/all#mac-osx)
+- G-gode sender: [gSender](https://github.com/Sienci-Labs/gsender)[¶](https://fabacademy.org/2022/labs/kannai/Instruction/tips/genmitsu_prover_xl_setup/#g-gode-sender-gsender)
+    - [Installation](https://resources.sienci.com/view/gs-installation/)
+    - Download setting file [gSender-settings-Genmitsu PROVerXL-4030.json](https://fabacademy.org/2022/labs/kannai/Instruction/images/proverXL/gSender-settings-Genmitsu%20PROVerXL-4030.json)
+    - Gear icon(right top) -> Clock to open Setting
+        - General -> Settings -> Import Settingds
+        - Import Setting [gSender-settings-Genmitsu PROVerXL-4030.json](https://fabacademy.org/2022/labs/kannai/Instruction/images/proverXL/gSender-settings-Genmitsu%20PROVerXL-4030.json)
+
+        ![スクリーンショット 2022-02-20 11.42.07.png](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_11.42.07.png)
+
+
+- Connect PROVerXL 4030 and power ON
+
+![IMG_20220220_120441.jpg](../images/week04/IMG_20220220_120441.jpg)
+
+- Connect to Machine -> Unrecognized devices -> /dev/tty.usbserial-10
+
+![スクリーンショット 2022-02-20 12.03.06.png](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_12.03.06.png)
+
+homing : move the header to home position
+
+rapid / normal / precise : how much the header move
+
+### Mill LineTest
+
+- Click Load File and open [SVG image.nc](https://fabacademy.org/2022/labs/kannai/Instruction/images/proverXL/SVG%20image.nc)
+- Download [png.txt](https://fabacademy.org/2022/labs/kannai/Instruction/images/proverXL/mods/mill_2D_PCB_png.txt)
+- Open [mods](https://mods.cba.mit.edu/) (MIT server)
+    - program > open local program > mill_2D_PCB_svg.txt > open
+- select png file and import [file](http://academy.cba.mit.edu/classes/electronics_production/linetest.png)
+
+![Untitled](../images/week04/Untitled%203.png)
+
+set and calcurate
+
+![スクリーンショット 2022-02-20 12.12.17.png](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_12.12.17.png)
+
+output path
+
+![スクリーンショット 2022-02-20 12.15.19.png](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_12.15.19.png)
+
+load [image.nc](http://image.nc) in gsender
+
+![スクリーンショット 2022-02-20 12.15.45.png](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_12.15.45.png)
+
+imported  data
+
+![スクリーンショット 2022-02-20 12.16.34.png](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_12.16.34.png)
+
+Fix PCB on workplace by double-coated adhesive tape and set endmill at the header.
+
+Adjust the position to the grinding position and Push “Zero all”
+
+![スクリーンショット 2022-02-20 12.38.38.png](Week4%20Feb%20%20c0198/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_12.38.38.png)
+
+Caution: When aligning the Z, I put a paper between the ground and the endmill to fine-tune the needle position. Lower the header until the paper tears.
+
+![IMG_20220220_123658.jpg](W../images/week04/IMG_20220220_123658.jpg)
+
+Set the header position as Zero. and Push “Start Job”
+
+![スクリーンショット 2022-02-20 12.38.58.png](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_12.38.58.png)
+
+However, It works once by pushing “Start Job”, but it occured the error and stop soon.
+
+We need to start again and get rid of the bug.
+
+![スクリーンショット 2022-02-20 13.10.36.png](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_13.10.36.png)
+
+After push “Reset2 and “Go to XY0”, I broke the endmill because the z-axis was too low 😭
+
+![IMG_20220220_124436__01.jpg](../images/week04/IMG_20220220_124436__01.jpg)
+
+so edit the code of gSender to remove bug of LINE 9.
+
+![スクリーンショット 2022-02-20 12.19.45.png](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_12.19.45.png)
+
+comment out “G04~~” and “T * tool +M06~~~”
+
+![スクリーンショット 2022-02-20 12.19.38.png](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_12.19.38.png)
+
+![スクリーンショット 2022-02-20 14.31.34.png](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_14.31.34.png)
+
+set “cut depth” 0.2mm
+
+![スクリーンショット 2022-02-20 12.29.12.png](../images/week04/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88_2022-02-20_12.29.12.png)
+
+Save local programme as text and html so as not to need to edit gSender code again.
+
+Try again to push “Start Job” Finish to make Interior.
+
+Next, cut outline in the same way.
+
+![Untitled](../images/week04/Untitled%204.png)
+
+Finish the LineTest Board.
+
+remove the sticky double-sided tape by acetone
+
+![IMG_20220220_132305.jpg](../images/week04/IMG_20220220_132305.jpg)
+
+![IMG_3027.jpeg](../images/week04/IMG_3027.jpeg)
+
+## **What we learn**[¶](https://fabacademy.org/2022/labs/kannai/Weekly_Group_Assignments/week03/#what-we-learn)
+
+to [Yukiya’s individual site](https://fabacademy.org/2022/labs/kannai/students/yukiya-yamane/assignments/week05/)
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