week3 groupassignment 2

docs/Weekly_Group_Assignments/week03.md

 # 3. Computer controlled cutting
 
-## Instruction
+## **Instruction**
 
 characterize your lasercutter's focus, power, speed, rate, kerf, joint clearance and types
 
-## Lesercutter we used
+## **Lesercutter we used**
 
 The following is information of the Lasercutter used at Fablab Kannai.
 
@@ -17,7 +17,7 @@ Universal VLS 2.3
 - 30W CO2
 
 
-## focus
+## **focus**
 
 ![](../images/week03/focus.png)
 
@@ -28,7 +28,7 @@ Universal VLS 2.3
 
 ![](../images/week03/laser_1.png)
 
-set Z=0.6 as starting point(zero) and change z parameter by 5mm
+Set Z=0.6 as starting point(zero) and change z parameter by 5mm
 Unexpectedly, there is not a significant difference from the front viewpoint
 
 ![](../images/week03/focus_board.jpg)
@@ -36,7 +36,7 @@ Unexpectedly, there is not a significant difference from the front viewpoint
 However, looking at the back we find the board is not cut enough above 3.5mm
 ![](../images/week03/focus_result.jpg)
 
-## Power, Speed, Rate
+## **Power, Speed, Rate**
 
 The data we used for power, speed, rate test
 
@@ -51,29 +51,30 @@ Only the column of power=40 is displayed and Command +P
 
 ![](../images/week03/laser_1.png)
 
-launch UCP software and select Medium Density Fiberboard at material database
+Launch UCP software and select Medium Density Fiberboard at material database
 
 ![](../images/week03/laser_2.png)
 
-cut the cardboard in each setting
+Cut the cardboard in each setting
 
 ![](../images/week03/laser_5.jpg)
 
-we found that the best setting for this cardboard is here
+We found that the best setting for this cardboard is here
 **Power=70, Speed=20, PPI=250**
 
 ![](../images/week03/laser_5.5.jpg)
 
 
-## kerf
+## **kerf**
+
+In order to measure kerf, we use the data below.
 
-in order to measure kerf, we use the data below.
 - 10 sticks (11 cuts)
 - 1/2 + 9 + 1/2 = 10 Kerf
 
 ![](../images/week03/kerf_test.png)
 
-cut the cardboard in the setting below
+Cut the cardboard in the setting below
 **Power=70, Speed=20, PPI=250**
 
 ![](../images/week03/laser_6.jpeg)
@@ -96,7 +97,7 @@ lay them side by side and measure the total lengry by digital caliper
 
 **kerf = 0.245 mm**
 
-## Joint Clearance for pressfit
+## **Joint Clearance for press-fit**
 
 Measure thickness of the cardboard 5 times and calculate the average for them
 
@@ -109,30 +110,37 @@ Measure thickness of the cardboard 5 times and calculate the average for them
 ave.
 **thickness = 2.85**
 
-we use the data for joint clearance test
+We use the data for joint clearance test
 ![](../images/week03/comb-test.png)
 
-set the result of experiment as parameter of thickness and kerf
+Set the result of experiment as parameter of thickness and kerf
 ![](../images/week03/laser_8.5.png)
 
-cut the comb
+Cut the comb
 ![](../images/week03/laser_9.jpeg)
 
 and we test which slit is the best fit
 
 ![](../images/week03/laser_10.jpeg)
 
-As a result, we get the final answer of the joint clearance as 0.1
+As a result, we get the final answer of the joint clearance as 0.1.
 
-so I found value of the best slit width below
+So I found value of the best slit width below
 
 Thickness 2.85
+
 -Kerf 0.245
+
 -Joint Clearance 0.1
+
 =2.505
 
+## **What we learn**
+
+to [Yukiya's individual site](https://fabacademy.org/2022/labs/kannai/students/yukiya-yamane/assignments/week04/)
+
 
-## Files we used
+## **Files we used**
 - [Power, Speed, Rate test](https://fabacademy.org/2022/labs/kannai/Instruction/images/week02/fa2021-group-assignment-power-speed-ppi.svg)
 
 - [Kerf test](https://fabacademy.org/2022/labs/kannai/Instruction/images/week02/fa2022-group-assignment-laser_kerf_x10%20.f3d)