[Kanda]

I want to create the following mechanism.
Base -> Lin -> Rot -> Rot -> Rot

If I need to combine multiple simple robot axes, is there a way to package them as one robot like the online library robot?

[Albert]

You can model a scara robot having axis 1 as the translation axis by following these steps:

1. Select Utilities-Model Mechanism or Robot
   
2. Select the option: 4 axes SCARA robot (T=axis 1)
   

You can find more information here:
https://robodk.com/doc/en/General.html#ModelRobot