The purpose of this is to provide a robot with an arm to which is fitted a cheap RFID reader PCB. The robot can then position the arm to read a tag attached to a 'box'. This has been designed as part of the robot warehouse demonstration. The arm can also do basic push and pull operations on a 'box' so that it can be used to load/unload a small robot platform.
The .stl files can be downloaded below. The original design is available on Tinkercad by searching for Tekyinblack/SG90 Robot Arm RFID Reader. Also available on Thingiverse.