Read the zero position of the scale Ⓐ in mm on the scale Ⓑ (29mm in the picture on the right)
Look at the scale Ⓐ and read the scale Ⓒ that comes to the same position as the scale Ⓑ (matching between bottom and top scales) (the above figures in 0.1 mm increments)
The total measured value of (1) and (2) is 29.6 mm.

Specification / Model	G1-40R15	G1-40R35	G1-40R51
Stage Surface (mm)	40 X 40	40 X 40	40 X 40
Rotation Center (mm)	15	35	51
Travel Range	± 15º	± 15º	± 10º
Rotation Angle	≒3.46º	≒2.19º	≒1.6º
Resolution (mm)	0.1º / Vernier	0.1º / Vernier	0.1º / Vernier
Round less (mm)	15±0.2	35±0.2	51±0.2
Travel Guide	Dovetail Type, Worm & Gear	Dovetail Type, Worm & Gear	Dovetail Type, Worm & Gear
Material	Aluminum	Aluminum	Aluminum
Load Capacity (kg/f)	3	3	3
Weight (kg)	0.2	0.2	0.2

Specification / Model	G1-60R50	G1-60R60	G1-60R84	G1-60R60S
Stage Surface (mm)	60 X 60	60 X 60	60 X 60	60 X 60
Rotation Center (mm)	50	60	84	60
Travel Range	± 15º	± 15º	± 15º	± 5º
Rotation Angle	≒1.38º	≒1.31º	≒0.93º	≒1.31º
Resolution (mm)	0.1º / Vernier	0.1º / Vernier	0.1º / Vernier	0.1º / Vernier
Round less (mm)	50±0.2	60±0.2	84±0.2	60±0.2
Travel Guide	Dovetail Type, Worm & Gear	Dovetail Type, Worm & Gear	Dovetail Type, Worm & Gear	Dovetail Type, Lead Screw
Material	Aluminum	Aluminum	Aluminum	Aluminum
Load Capacity (kg/f)	6	6	6	6
Weight (kg)	0.22	0.175	0.22	0.175