Load on the Arm

When a camera, valve, or other object is attached to the arm, its weight is converted to the equivalent weight of the shaft and added to the weight of the load attached to shaft to set the "Hand Weight" parameter.

Equivalent Weight Formula

When attaching to the root of Arm #2: W_M=M×(L_M＋L₁)²/(L₁＋L₂)²

When attaching to the end of Arm #2: W_M=M×(L_M)²/(L₂)²

• W_M: equivalent weight
• M: Weight of camera etc.
• L₁: length of Arm #1
• L₂: length of Arm #2
• L_M: distance from rotation center of Joint #2 to center of gravity of the camera etc.

Calculates [Weight] parameter when a “1 kg” camera is attached to the end of the LA6-A arm (375 mm away from the rotation center of Joint #2) with a load weight of “1 kg”.

M=1

L₁=325

L₂=275

L_M=375

W_M=1×(375+325)²/(325+275)²=1.36

(Round up to two decimal places)

W+W_M=1+1.36=2.36

Enter “2.36” for the Weight Parameter.

Symbol	Description
a	Shaft
b	Weight of the entire camera
c	Joint #2