5.Let's-build/Alternator/Alternator-Rotor.md

@@ -14,32 +14,36 @@ See pos. 2 in the [BOM](/3.Tools-and-materials/1.Bill-of-materials), not all mat
 
 ## Downwind Magnet Disk
 
-### 1. Clean all metal components used in this assembly
+### 1. Sand all surfaces
+
+Wherever the adhesive will be used, the metal must first be roughened with sandpaper.
+
+### 2. Clean all metal components used in this assembly
 
 Use protective gear and acetone for cleaning during this assembly.
 
-### 2. Prepare Downwind Magnet Disk
+### 3. Prepare Downwind Magnet Disk
 
 Place the Downwind Magnetic Disc on your workbench. Don't forget to put a piece of cardboard or similar underneath to protect your workbench.
 
 ![SubAssembly.AlternatorRotor_2](/img/AlternatorRotor/SubAssembly.AlternatorRotor_2.png)
 
-### 3. Prepare the glue
+### 4. Prepare the glue
 
 Before mixing the two component epoxy adhesive, check that you have all the components ready for the next steps. After that mix the two component adhesive according to the manufacturer's specifications. 
 
-### 4. Completely moisten the Downwind Magnet Disk with epoxy adhesive
+### 5. Completely moisten the Downwind Magnet Disk with epoxy adhesive
 
 ![SubAssembly.AlternatorRotor_3](/img/AlternatorRotor/SubAssembly.AlternatorRotor_3.png)
 
-### 5. Place the Magnet Stencil
+### 6. Place the Magnet Stencil
 
 To ensure the stencil is perfectly placed, use a few screws to secure it to the Downwind Magnetic Disc before placing the magnets.
 
 ![SubAssembly.AlternatorRotor_4](/img/AlternatorRotor/SubAssembly.AlternatorRotor_4.png)
 ![SubAssembly.AlternatorRotor_5](/img/AlternatorRotor/SubAssembly.AlternatorRotor_5.png)
 
-### 6. Place the Magnets
+### 7. Place the Magnets
 
 Place the magnets on the disc in alternating polarity. Always check the polarity of the next magnet with the one that has already been glued. To do this, hold the next magnet in your fist and then run your hand carefully over the glued magnet to feel the polarity in your arm. If the magnets repel each other, the magnet in the hand can be placed on the disc in the next free spot.  
 
@@ -50,28 +54,32 @@ Place the magnets on the disc in alternating polarity. Always check the polarity
 
 Repeat the above procedure with the Upwind Magnet Disk.
 
-### 1. Clean all used components
+### 1. Sand all surfaces
+
+Wherever the adhesive will be used, the metal must first be roughened with sandpaper.
+
+### 2. Clean all used components
 
 Use acetone for cleaning and protective gear during this assembly.
 
-### 2. Prepare Upwind Magnet Disk
+### 3. Prepare Upwind Magnet Disk
 
 Use the same process as above.
 
 ![SubAssembly.AlternatorRotor_8](/img/AlternatorRotor/SubAssembly.AlternatorRotor_8.png)
 
-### 3. Completely moisten the Downwind Magnet Disk with epoxy adhesive
+### 4. Completely moisten the Downwind Magnet Disk with epoxy adhesive
 
 ![SubAssembly.AlternatorRotor_9](/img/AlternatorRotor/SubAssembly.AlternatorRotor_9.png)
 
-### 4. Place the Magnet Stencil
+### 5. Place the Magnet Stencil
 
 To ensure the stencil is perfectly placed, use a few screws to secure it to the Upwind Magnetic Disc before placing the magnets.
 
 ![SubAssembly.AlternatorRotor_10](/img/AlternatorRotor/SubAssembly.AlternatorRotor_10.png)
 ![SubAssembly.AlternatorRotor_11](/img/AlternatorRotor/SubAssembly.AlternatorRotor_11.png)
 
-### 5. Place the Magnets
+### 6. Place the Magnets
 
 This time check the position of the first magnet with one of the glued Downwind Magnet Disk for the first magnet you place. As mentioned above, the opposing magnet on the other disc must have the reverse polarity (the magnets attract each other.) to create the desired magnetic flux. Once the first magnet is in place, repeat the process while alternating the polarity like before.