Mitsubishi MELFA SQ Series Special Specifications Manual page 27

2.3 Names of each part of the robot
J5 axis
＋
J6 axis
－
Mechanical interface
(Hand installation flange surface)
Wrist
＋
－
＋
Elbow
Shoulder
－
J1 axis
Note1)
J4 axis
＋
－
－
＋
－
Note1)J4-axis dosen't exist for 5-axis type.
Fore arm
Elbow block
* This part doesn't exist
for the 5-axis type.
J3 axis
Upper arm
J2 axis
Waist
＋
Base
Names of each part of the robot
２ Robot arm