edits

docs/machines/3DPrinter/Step by Step Assembly.md

@@ -4,7 +4,7 @@ The build instructions below are divided into two parts, namely pre-assembly and
 
 ## Hardware
 
-| Button Head Cap Screw (BHCS) | Socket Head Cap Screw (SHCS) | DIN 433 Washer | Teethed Idler Pulley |
+| Button Head Cap Screw (BHCS) have a cylindrical head with a hex slot and require an allen wrench  | Socket Head Cap Screw (SHCS) have a round head with a hex slot that requires an allen wrench | DIN 433 Washer are thin precise washers that are used as spacers between idler pulleys | Teethed Idler Pulley have the toothed side of a timing belt moving on it |
 | ---- | ---- | ---- | ---- |
 | <img src="pictures/hardware_bhcs.PNG" width="250" /> | <img src="pictures/hardware_shcs.PNG" width="250" /> | <img src="pictures/hardware_washer.PNG" width="250" /> | <img src="pictures/hardware_teethed_idler.PNG" width="300" /> |
 | **Button Head Cap Screw (BHCS)** - These screws have a hex head and require an allen wrench | **Socket Head Cap Screw (SHCS)** - These screws have a hex head that require an allen wrench | **DIN 433 M3 Washer** - Thin precise washers that are used as spacers between idler pulleys | **Teethed Idler pulley** - The toothed side of a timing belt moves on a teethed idler pulley |