CCM update

docs/Computer-controlled Machining.md

-Computer controlled machining
-=============================
+#Computer controlled machining
 
 This week is about making something big using a CNC milling/routing machine. I want to explore the possibilities of CNC machining - drill, pocket, dog-bones, nesting, etc. I tried to make a versatile furniture piece so that I can use different joints and experiment with them.
 
-### Measure material
-
+### Page Summary
+1. Introduction
+2. Design  
+3. Nesting
+4. CAM
+5. Machining
+6. Assembly
+7. References
+8. Design Files
+---
+
+1. Introduction
+---
 Material available for use is a veneer plywood of size 1220 x 1220 x 15 mm.
 
 I will check exact thickness with a vernier caliper when in the lab.
-
-### Design
-
-I wanted to make a table with adjustable height so after some viewing some references, I decided to make trestle legs for a desk steup. I started by making a 3D version of IKEA's FINVVARD to understand how it works.
-
-
-![](./images/ccm/finnvard.jpeg)  
-
+I wanted to make a table with adjustable height so after some viewing some references, I decided to make trestle legs for a desk steup.  
+![](./images/ccm/finnvard.jpeg)   
+I started by making a 3D version of IKEA's FINVVARD to understand how it works.  
 ![](./images/ccm/basic.jpg)  
 
+Since, I didn't have access to the lab during this week, I did the CAM part according to tools used in FabLabBCN.  
+Later when I used FabLab SP, I did it again using Vcarve Pro.
 
+2. Design
+---
 Then I started making individual joints so they can be digitally machined in 2-axes or 2.5-axes. I used some details from the 50 digital joints poster to design some details.
 
-<img src="https://4.bp.blogspot.com/--n9402OLTus/U_6noVXA59I/AAAAAAAACSc/oZ05jYxALrg/s1600/j118.jpg" alt="traces" width="400"/>
-<img src="https://2.bp.blogspot.com/-jbDFz7SGcr0/U_ciJGzoTUI/AAAAAAAAB_k/I0WwxF5HTmo/s1600/j62.jpg" alt="traces" width="400"/>
-<img src="https://4.bp.blogspot.com/-s0gWF8SllU4/U_cbds0bfQI/AAAAAAAAB-s/eU6Buz-VbYE/s1600/j66.jpg" alt="traces" width="400"/>
-<img src="https://d2mgbjyendvdw0.cloudfront.net/27204/03423/9ae702/slot-joint-02.standard.png" alt="traces" width="400"/>
-
-I made some slotted joints, and versions of the finger tennons, lapped finger tennons, throughhole finger tennons to design the trestle. ![](./images/ccm/1.png)  
-
-<img src="./images/ccm/2.png" alt="traces" width="400"/>
-
-![](./images/ccm/3.png)  
+<img src="https://4.bp.blogspot.com/--n9402OLTus/U_6noVXA59I/AAAAAAAACSc/oZ05jYxALrg/s1600/j118.jpg" alt="traces" width="400"/><img src="https://2.bp.blogspot.com/-jbDFz7SGcr0/U_ciJGzoTUI/AAAAAAAAB_k/I0WwxF5HTmo/s1600/j62.jpg" alt="traces" width="400"/>  
+<img src="https://4.bp.blogspot.com/-s0gWF8SllU4/U_cbds0bfQI/AAAAAAAAB-s/eU6Buz-VbYE/s1600/j66.jpg" alt="traces" width="400"/><img src="https://d2mgbjyendvdw0.cloudfront.net/27204/03423/9ae702/slot-joint-02.standard.png" alt="traces" width="400"/>  
 
+I made some slotted joints, and versions of the finger tennons, lapped finger tennons, throughhole finger tennons to design the trestle.
+![](./images/ccm/1.png)   
+![](./images/ccm/2.png)  
+![](./images/ccm/3.png)    
 
 Here is how the final legs look. I need to make 2 of these and put any flat board on top to make a tabletop.
 
-
 ![](./images/ccm/final.jpg)  
 
 
-#### Cutting file + Nesting
-
+3. Nesting
+---
 Next, I lay everything flat on the XY plane and did a make 2D. For nesting I used an online service called [nestandcut.com](https://nestandcut.com/) to nest all parts in twice the quantity on a sheet of 1220x1220x15 mm. (Half a sheet). I uploaded a dxf file that I export from Rhino and imported the nested dxf back.
 
-
 ![](./images/ccm/nest.jpg)  
 
-
 I made some changes manually to fit it all in the available sheet. Like I put two parts insode the big board and nest it within to make more space for the missing parts. Here is what that looks like:
 
 ![](./images/ccm/nested.jpg)  
 
 
-### CAM
-
+4. CAM
+---
+### RhinoCAM
 Next, I shifted to the Windows partition of my computer and installed [RhinoCAM.](https://mecsoft.com/rhinocam/) I opened the RhinoCAM machining browser plug-in in Rhino6. First I set it to MILL. In the program tab, I set up the material stock - 1220x1220x15.5 mm, the machine details - 3 axis , post - shopbot.
 
 I set the origin at the left bottom corner and the Z at the top of the material stock.
 
 ![](./images/ccm/setup.jpg)  
 
-
-Next I set the tool - Flatmill 6mm, refering to the class notes and some previous documentations:
-
+Next I set the tool - Flatmill 6mm, refering to the class notes and some previous documentations:  
 *   Saved the tool as Flatmill 6mm
 *   Holder dia = 50
 *   Holder length = 45
@@ -71,9 +72,7 @@ Next I set the tool - Flatmill 6mm, refering to the class notes and some previou
 *   Shoulder length = 30mm
 *   Flute length = 30mm  
 
-
-    Feed and speeds:
-
+Feed and speeds:  
 *   Speeds: 12000 rpm
 *   Plunge: 2000 rpm
 *   Approach: 2000 rpm
@@ -82,75 +81,64 @@ Next I set the tool - Flatmill 6mm, refering to the class notes and some previou
 *   Retract: 2000 rpm
 *   Departure: 2000 rpm  
 
+Next, in 2-axis functions there is a list of actions you can perform. For my design I needed engraving, profiling and pocketing.
 
-    Next, in 2-axis functions there is a list of actions you can perform. For my design I needed engraving, profiling and pocketing.
-
-    #### Engraving
-
-    I set 5 points in the rhino file to engrave markings for screws to be drilled with a hand drill in the correct places. ![](./images/ccm/engraving.jpg)  
-
-
-    #### Pocketing
+#### Engraving
+I set 5 points in the rhino file to engrave markings for screws to be drilled with a hand drill in the correct places![](./images/ccm/engraving.jpg)  
 
-    The insides of some parts that needed to be cleared were cut first. 2 parts needed pocketing at different heights, So after making adjustments in 2 different layers I changed the cut depth for both. 15mm for all parts except 2 where it was 10mm.
 
-    ![](./images/ccm/fullpocketing.jpg)  
+#### Pocketing
+The insides of some parts that needed to be cleared were cut first. 2 parts needed pocketing at different heights, Safter making adjustments in 2 different layers I changed the cut depth for both. 15mm for all parts except 2 where iwas 10mm.
 
+![](./images/ccm/fullpocketing.jpg)  
 
-    Settings
-
+Settings:  
 *   Cut pattern: Offset
 *   Cut direction: Conventional (Up cut) - standard for plywood
 *   Start point: inside
 *   Rough depth: 12
 *   Finish depth: 3
 
-    #### Profiling
-
-    To cut the outside profiles of the parts, I set the profiling for 2.5 axis. I also made another profiling - inside for 2 curves that needed to be cut on the inside.
-
-    ![](./images/ccm/outerprofiling.jpg)  
-
+#### Profiling
+To cut the outside profiles of the parts, I set the profiling for 2.5 axis. I also made another profiling - inside fo2 curves that needed to be cut on the inside.
 
-    Settings same as pocketing, set toolpath OUTSIDE the curves
+![](./images/ccm/outerprofiling.jpg)  
 
-    #### Simulation
+Settings same as pocketing, set toolpath OUTSIDE the curves
 
-    ![](./images/ccm/simlulation1.jpg)  
+#### Simulation
+![](./images/ccm/simlulation1.jpg)  
 
+Then I ran a simulation and found some errors in the settings.  
+1.  The cutting height did not match the level of the stock. It was cutting in the air. I adjusted this by going bacto the material panel and changing the stock thickness to 15mm. (It was 300 by mistake)
+2.  The tool path just ran once over all profiles and went in 15mm in one pass. I changed this by making the cut dept15mm in roughing and finishing at 12 and 3 respectively.
+3.  Some parts were creating double paths - so I deselected them from one layer and generated toolpaths again.
 
-    Then I ran a simulation and found some errors in the settings.
+After running another simulation, it seemed fine.
+![](./images/ccm/simlulation2.jpg)  
 
-    1.  The cutting height did not match the level of the stock. It was cutting in the air. I adjusted this by going back to the material panel and changing the stock thickness to 15mm. (It was 300 by mistake)
-    2.  The tool path just ran once over all profiles and went in 15mm in one pass. I changed this by making the cut depth 15mm in roughing and finishing at 12 and 3 respectively.
-    3.  Some parts were creating double paths - so I deselected them from one layer and generated toolpaths again.
+### Vcarve Pro  
 
-    After running another simulation, it seemed fine.
 
 
-    ![](./images/ccm/simlulation2.jpg)  
+5. Machining
+---
+Will do this part when I return to the lab.
 
+6. Assembly
+---
+Will do this part when I return to the lab.
+Here's how it should look when done. (w/o the top surface) ![](./images/ccm/table.jpg)  
 
-    ### Machining
-
-    Will do this part when I return to the lab.
-
-    ### Assembly
-
-    Will do this part when I return to the lab.
-
-    Here's how it should look when done. (w/o the top surface) ![](./images/ccm/table.jpg)  
-
-
-    ### References
-
+7. References
+---
 *   [IKEA Finnvard trestle](https://www.ikea.com/us/en/p/finnvard-trestle-with-shelf-birch-30345717/)
 *   [This CNC wood joinery post](https://mkmra2.blogspot.com/2014/08/cnc-cut-wood-joinery.html)
 *   [50 Digital Joints](https://makezine.com/2014/12/04/50-digital-wood-joints-poster/)
 *   [Digital Fabrication for Designers blog](http://mkmra2.blogspot.com/2014/08/cnc-cut-wood-joinery.html)
 
-    ### Design Files
-
+8. Design Files
+---
 *   [Rhino 3D](./images/ccm/rhino3D.zip)
 *   [Parts stl](./images/ccm/parts.stl.zip)
-*   [RhinoCAM](./images/ccm/trestlelegs.3dm.zip) (Got an error while saving this - not all CAM changes can be saved, so not sure if this file works properly)
+*   [RhinoCAM](./images/ccm/trestlelegs.3dm.zip)