| Step 1                                                                                                                                      |                                                                                                  |
|---------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------|
|  Components Required                                                                                                                        | ![](media/91cd1fb63fc56436be7ba6554e9c2971.png)                                                  |
|  Dismantle two screws ![](media/0096aa27476bb6be51dd3d7b7524b164.png) As shown below: ![](media/f6dfa732b9ccee8efa134b95c256eaec.png)       |                                                                                                  |
|  Insert polish rods into the bearing ![](media/38859161b297d6930896dae58f2a3d8b.png)    ![](media/e0c433fc33e0b155946fcb5c3397891c.png)     |                                                                                                  |
| Assemble the dismantled component again ![](media/50d2719ccafda5b729823f3e8cb95e4e.png)     ![](media/ae88db2f3bd8e114c8e66bf1bee5914b.png) |                                                                                                  |
| Synchronous Belt                                                                                                                            |                                                                                                  |
| GT2 ![](media/8f6e02cc41103193d569774e88638bd0.png)                                                                                         |                                                                                                  |
|   Loosen two clap plates                                                                                                                    | ![](media/a7fe67c789278234a0012f4f98cae0e6.jpeg)                                                 |
|  Make a synchronous belt go through the right clap plate and fix them together                                                              | ![](media/f7fe14210d4828a52e4e7c19a4e246eb.jpeg)                                                 |
|   Then make it go through the synchronous wheel                                                                                             | ![](media/5ef82929fff0e92244e925dee7c19554.jpeg)                                                 |
| Hang the synchronous belt on the synchronous wheel of right motor                                                                           | ![](media/150f11cff681659581e64da18110a874.jpeg)![](media/c3655f1d6fb229c4187740b9ffaa7dad.jpeg) |
|   Then make the belt clamber onto the right wheel(as shown in the graph)                                                                    | ![](media/b3b98030e678fc78e5846c5b7eada2a2.jpeg)                                                 |
|  Then hang on the upper one (as shown in the graph)                                                                                         | ![](media/29c1527252e8df21bd1173abdae7db71.jpeg)                                                 |
|     Then clamber on the left one                                                                                                            | ![](media/292dd389823cb38abb9beec361d23262.jpeg)                                                 |
|    Go through the left driving wheel of the left motor                                                                                      | ![](media/906cb0e18a5cc30b8331042fdadb8d15.jpeg)                                                 |
|   Next, pass through the lower left synchronization wheel                                                                                   | ![](media/70cf1d3f03af3936bdd44246c154c85d.jpeg)                                                 |
|  At last, pass through the clap plate with the the other end of synchronous belt and lock it tightly                                        | ![](media/2117d1ab11e13b59071470cac4d446bb.jpeg)                                                 |
| Wiring up                                                                                                                                   |                                                                                                  |
|        Left motor                                                                                                                           | ![](media/ac8ca2c843d063686b8b106830f15431.jpeg)![](media/bdeedd3bd4f11f604399dfc3127e3a4b.jpeg) |
|         Wire up the left motor                                                                                                              | ![](media/dbbb9139a329d36577c4451b5c6d7f05.jpeg)![](media/d02b493b0cbac0d46a518409862a5445.jpeg) |
|      You need to interface the servo with the control board using extension Dupont wires                                                    | ![](media/3e93fd0b1e7f7f3423226eb751275829.jpeg)![](media/ed0c3f45192e168efbfdb3c9dc718356.jpeg) |
| Adjust the servo to initial angle                                                                                                           |                                                                                                  |
|    Pull the pen holder out                                                                                                                  | ![](media/423f05207c7e62afb43b32484550f7e1.jpeg)                                                 |
|  Rotate the servo anticlockwise until it stuck(the state that rotation is restricted)                                                       | ![](media/dbf7633638315bf6a56b89777a2c10c7.jpeg)                                                 |
|   Then fix the pen holder onto the sliding trail                                                                                            | ![](media/23f199e5fded4c0552eca274f6612723.jpeg)                                                 |
| Hold a pen                                                                                                                                  |                                                                                                  |
|   Rotate the knob anticlockwise                                                                                                             | ![](media/7992390e99b50f7750ba379923c834c9.jpeg)                                                 |
|     Put a pen and adjust it at a proper height. Then lock it tightly                                                                        | ![](media/94955c8e2ff02d7bf5a1ba54b37cfe3a.jpeg)![](media/a6f41935ae9a38a65bd02bd68d38ea82.jpeg) |