add inst LargeCNC

docs/Instruction/week07.md

 # 7. Computer controlled machining
 
-This week I worked on defining my final project idea and started to getting used to the documentation process.
+## Group Assignment
 
-## Research
+>  do your lab's safety training  
+>  test runout, alignment, fixturing, speeds, feeds, materials, and toolpaths for your machine
 
-"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."
 
-> "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."
+### ToDo
 
-## Useful links
+####  safety training
 
-- [Jekyll](http://jekyll.org)
-- [Google](http://google.com)
-- [Markdown](https://en.wikipedia.org/wiki/Markdown)
+- read [TAKE-SPACE Large CNC Training Docs](https://docs.google.com/document/d/1HAb7XKopjKgCrtNjoOn2nsN3iMQ-zhJ3SQZYq8z9ems/edit?usp=sharing)
+- safety
+    - Eye protection
+    - shoes
+    - clothes
+    - hair
+    - gloves
 
-## Code Example
+#### Test
 
-Use the three backticks to separate code.
+> **The Feeds and Speeds**
+>  
+>    **The speed at which we move a cutter across the material is called the “feed rate”**.   
+> **The rate of rotation is called the “speed”** and is controlled by how fast the router or spindle turns the cutting tool. Both feed rate and spindle speed will vary based on the material being cut. A general rule of thumb is that you want to move the tool through the material as fast as possible, without sacrificing surface finish. The longer the tool rotates in any one place, the more heat that builds up. Heat is your enemy and can burn your material or radically decrease the life or your cutting tool.  
 
-```
-// 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);
-}
+> **Feed rate vs spindle speed**: Spindle speed that is too fast paired with a slow feed rate can result in burning or melting. Spindle speed that is too slow paired with a faster feed rate can result in dulling of the cutting edge, deflection of the end mill and possibility of breaking the end mill.
 
-// 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
-}
-```
+![](./images/week08/fastspeed.jpg){width=200}
+![](./images/week08/slowspeed.jpg){width=200}
+![](./images/week08/bestspeed.jpg){width=200}
 
-## Gallery
+Ref. [Berytech Fab Lab](https://fabacademy.org/2021/labs/berytech/Computer_Controlled_Machining.html)
 
-![](../images/sample-photo.jpg)
+- runout
+- alignment
+- fixturing
+- (Spindle) speeds
+    - [rpm]
+    - 12000 [rpm]
+- feed rate
+    - [mm/min]
+    - 700 [mm/min]
+- materials
+    - Plywood?
+- toolpaths
+    -  Cut2D
 
-## Video
+![](./images/week08/group_test.png)
 
-### From Vimeo
+- measure
+    - sizes (X and Y Axis)
+    - kerf -> runout (diff tood_dia)
+    - depth of cut on tabs (Z Axes)
+- test
+    - joints
 
-<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>
+## Individual Assignment
 
-### From Youtube
+> make (design+mill+assemble) something big (~meter-scale)  
+      extra credit: don't use fasteners or glue  
+      extra credit: include curved surfaces  
 
-<iframe width="560" height="315" src="https://www.youtube.com/embed/jjNgJFemlC4" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
+### ToDo
 
-## 3D Models
+#### Design
 
-<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>
+Fusion360
+ - thickness
+ - runout - tool_dia = offset/2
 
-<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>
+ mill
+ - bits
+     - straight bit
+     - flute
+
+Assemble
+- sanding
+- (glue)
+- paint?