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

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 The build instructions below are divided into two parts, namely pre-assembly and final assembly. In the pre-assembly some of the sub-assmeblies or parts are either prepared or assembled together to ease the final assembly. The number in the (#) paranthesis denotes the quantity of the part required.
 
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 ## Hardware
 
 | Button Head Cap Screw (BHCS)  | Socket Head Cap Screw (SHCS) | DIN 433 Washer  | Teethed Idler Pulley |
 | ---- | ---- | ---- | ---- |
-| <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="250" /> |
+| <img src="pictures/hardware_smooth_idler.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="250" /> |
 | **BHCS** have a button shaped head with a hex slot and require an allen wrench | **SHCS** have a cylindrical head with a hex slot and require an allen wrench | Thin precise washers that are used as spacers between idler pulleys | Teethed idler pulley has free rolling bearings and the toothed side of a timing belt moves on it |
 
 | Smooth Idler Pulley | Drive Pulley | Heatset Insert | Set Screw |