3dpd update

docs/3D Scanning and Printing.md

@@ -28,22 +28,25 @@ These tests individually help with testing:
 6. XY Resonance  
 7. Z Resonance  
 
-I use Cura to make the gcode. They are supposed to be evaluated at default at default 'normal' settings in PLA with a 0.4mm nozzle.  
-Layer Height: 0.15  
-Infill: 18%  
-Adhesion On
-Support Off
+I use [Cura](https://ultimaker.com/software/ultimaker-cura) to make the gcode. The tests are supposed to be evaluated at default 'normal' settings in PLA with a 0.4mm nozzle.  
+Layer Height: 0.15   
+Infill: 18%   
+Adhesion: On  
+Support: Off  
 
-![cura](./images/ed/ss/cura.jpg)  
+After downloading the files, I sliced them one by one like so:  
+![cura](./images/3dpd/curag.jpg)  
 
-I used an Ultimaker 2+ to perform the tests (Fablab SP).
-![U2](docs/images/ed/ss/u2.jpg)   
+I used an Ultimaker 2+ to print the prints in FabLab SP.  
+![U2](./images/3dpd/u2.jpg)   
 
-There is a nice evaluation system described in [How to evaluate the test geometries](https://makezine.com/2014/11/07/how-to-evaluate-the-2015-make-3dp-test-probes/). I used this to score the printer I was using. This is the result.
-![evaluation](./images/ed/ss/evaluation.jpg)  
+There is a nice evaluation system described in [How to evaluate the test geometries](https://makezine.com/2014/11/07/how-to-evaluate-the-2015-make-3dp-test-probes/). It assigns a score by observing details to evaluate the different qualities of the machine. I think it is an interesting way to determine and learn how to design well for a particular machine. I used this to score the printer I was using. This is the result.
+![evaluation](./images/3dpd/eval.jpg)  
 
 Here are all the tests overall:
-![tests](./images/ed/ss/tests.jpg)  
+![tests](./images/3dpd/tests.jpg)  
+
+It means that if I keep overhand till 50 deg, negative Tolerance atleast 0.4mm, not keep too fine details the qulaity of the design printing should be fine.  
 
 2. Designing for 3D printing
 ---

docs/Electronics Design.md

@@ -42,6 +42,18 @@ Set the multimeter to 'Continuity' - a diode symbol with propagation waves aroun
 Touch the two probes on the two points to be checked and beep will give the feedback.
 
 #### Use *oscilloscope* to check noise of operating voltage  
+An oscilloscope, o=scope or scope is useful to measure amplitude, frequency or transient signals that a multimeter cannot catch. It samples a signal and displays the waveform on a screen. Both digital squarewaves and analog curved waves.  
+
+Parts of the ocilloscope interface.
+1. The screen on the left displays the waveforms.
+2. The channel ports. This one has 2.  
+3. The vertical sections controls the voltage scale on the display for each channel independantly.
+4. The horizontal section controls the timescale for both channels.  
+5. The third section is to trigger specific controls of the scope.  
+6. The menu section has various settings, like capturing an image for eg.  
+7. Buttons to start and stop measuring.  
+8. Passive voltage scope to measure voltage across the probe ends.  
+
 ![](./images/ed/machine.jpg)   
 
 This tutorial on [How to use a oscilloscope](https://learn.sparkfun.com/tutorials/how-to-use-an-oscilloscope/all) is helpful.