====== FAQ ======

3D printing is still a technology that relies heavily on trial and error. It's nearly impossible to master the technology without getting your hands dirty. As there are no globally recognized standards in the 3D printer, material, or software manufacturing, it is vulnerable to a variety of printing problems. A multitude of 3D printer issues results in failed prints, which leads to a loss of business, if not your interest in the technology.

D120 has a fault diagnosis function, which can help users find faults.

===== 1. Nozzle clogging / the filament no coming out / nozzle not extruding material =====

| <font inherit/inherit;;#3498db;;inherit>Fault</font> | <font inherit/inherit;;#3498db;;inherit>Reason</font> | <font inherit/inherit;;#3498db;;inherit>Solution</font> |
|Nozzle clogging / the filament no coming out / nozzle not extruding material|①The blockage of the nozzle caused by the damp filament is a common problem.|You only need to clean the nozzle to continue to use it. In severe cases, you need to replace the nozzle or hotend. —- video:[[https://youtu.be/Vq8fvcp9x3I|https://youtu.be/Vq8fvcp9x3I]]|
| ::: |②The fan does not turn.|It needs to be replaced. —-video:[[https://youtu.be/jzoLccnCiAE|https://youtu.be/jzoLccnCiAE]]|

===== 2. No error reported,the model failed to print =====

| <font inherit/inherit;;#3498db;;inherit>Fault</font> | <font inherit/inherit;;#3498db;;inherit>Reason</font> | <font inherit/inherit;;#3498db;;inherit>Solution</font> |
|No error reported,the model failed to print. / Print out of shape / filament like spaghetti / first layer adhesion|①The platform is not sticky, and the Z-axis offset is wrong.|Please apply glue on the platform, and adjust Z-offset.|
| ::: |②The model parameters are incorrect  |Slicing support, speed, layer height and other parameters will affect the printing effect, please refer to the manual, or send the model to customer service to help solve the problem.|
|Stringing|The model parameters are incorrect|Slicing support, speed, layer height and other parameters will affect the printing effect, please refer to the manual, or send the model to customer service to help solve the problem.|
|USB cannot be connected|Incorrect operation|Please download the USB driver and select 115200 as the baud rate.|

===== 3. There is an error, and there is an obvious machine failure. =====

| <font inherit/inherit;;#3498db;;inherit>Fault</font> | <font inherit/inherit;;#3498db;;inherit>Reason</font> | <font inherit/inherit;;#3498db;;inherit>Solution</font> |
|Nozzle temperature measurement failed. / Nozzle heating failure|Hotend or cable is broken|Please replace with a new hotend. —-video:[[https://youtu.be/Y6TstFWRe4U|https://youtu.be/Y6TstFWRe4U]]|

 {{:d120:图片2.png?nolink&150|1}}

| <font inherit/inherit;;#3498db;;inherit>Fault</font> | <font inherit/inherit;;#3498db;;inherit>Reason</font> | <font inherit/inherit;;#3498db;;inherit>Solution</font> |
|Homing failure|Endstop or wire is broken|Please replace the endstop or endstop wire. —-video: [[https://youtu.be/okaka-AUUVc|https://youtu.be/okaka-AUUVc]]|

 {{:d120:图片1.png?nolink&150|2}}

| <font inherit/inherit;;#3498db;;inherit>Fault</font> | <font inherit/inherit;;#3498db;;inherit>Reason</font> | <font inherit/inherit;;#3498db;;inherit>Solution</font> |
|Nozzle hit platform|The leveling sensor is broken|Please replace the leveling sensor. —-video: [[https://youtu.be/6EkgeAADgaQ|https://youtu.be/6EkgeAADgaQ]]|

{{:d120:图片3.png?nolink&150|3}}