Add dust shoe instructions to README

README.md

@@ -91,6 +91,7 @@ or
 	8. [Wasteboard](#wasteboard)
 		1. [Cut out wasteboard](#cut-out-wasteboard)
 		2. [Attach wasteboard to CNC](#attach-wasteboard-to-cnc)
+	9. [Dust shoe (updated Feb 4, 2022)](#dust-shoe-updated-feb-4-2022)
 4. [Software](#software)
 	1. [Install CNC software (grbl) on Arduino Uno](#install-cnc-software-grbl-on-arduino-uno)
 		1. [Install Arduino Software (IDE)](#install-arduino-software-ide)
@@ -2055,6 +2056,50 @@ The wasteboard was placed underneath the CNC machine. 7x 3d-printed wasteboard b
 
 ![wasteboard_9](./images/build/frame/wasteboard_9.jpg)
 
+## Dust shoe (updated Feb 4, 2022)
+
+The purpose of a dust shoe is to collect the dust generated by the CNC machine. Ivan's original dust shoe didn't fit my router, thus I designed a new dust shoe using a brush.
+
+To not have to reprint the router bracket, I manually cut of the blocking piece from it. The STL/OBJ router bracket file in this repo is redesigned and updated, so no manual cutting should be needed.
+
+The brush slot at the bottom of the vaccum funnel (**P34**) was measured and the brush (**O27**) was cut at an appropriate length. The brush was then inserted into the slot. As the fit was very tight, no glue was needed.
+
+![dust_shoe_1](./images/build/frame/dust_shoe_1.jpg)
+
+![dust_shoe_2](./images/build/frame/dust_shoe_2.jpg)
+
+![dust_shoe_3](./images/build/frame/dust_shoe_3.jpg)
+
+![dust_shoe_4](./images/build/frame/dust_shoe_4.jpg)
+
+The vaccum funnel (**P34**) was placed next to the router bracket (**P24**) and a pen was used to indicate how much of the router bracket that was to be removed.
+
+![dust_shoe_5](./images/build/frame/dust_shoe_5.jpg)
+
+![dust_shoe_6](./images/build/frame/dust_shoe_6.jpg)
+
+A hand-held Fein multitool was used to remove the blocking piece from the router bracket. A sand paper was used to smooth out the edges.
+
+![dust_shoe_7](./images/build/frame/dust_shoe_7.jpg)
+
+![dust_shoe_8](./images/build/frame/dust_shoe_8.jpg)
+
+![dust_shoe_9](./images/build/frame/dust_shoe_9.jpg)
+
+![dust_shoe_10](./images/build/frame/dust_shoe_10.jpg)
+
+The vaccum funnel was then attached to the router bracket and a scissor was used to cut the brush at an appropriate length.
+
+![dust_shoe_11](./images/build/frame/dust_shoe_11.jpg)
+
+1x 80 mm M5 screw (**S17**) and 1x M5 nut (**N02**) was used to lock the vaccum funnel in place.
+
+![dust_shoe_14](./images/build/frame/dust_shoe_14.jpg)
+
+![dust_shoe_15](./images/build/frame/dust_shoe_15.jpg)
+
+![dust_shoe_16](./images/build/frame/dust_shoe_16.jpg)
+
 # Software
 
 ## Install CNC software (grbl) on Arduino Uno