Rev F Mar 2021
Page 11
Chapter 3 Installation and Operation
3.5.4 Converting Linear to Rotational Units
The APT software for the Z812B motor actuator has been written to accept millimeters
as the standard unit of translation. The relationship between movement of the motor
lead screw in millimeters and movement of the stage platform in degrees (or
arcseconds) is linear and the conversion factors are as follows:
Pitch
Movement in mm
Angle (arcsec)
Angle (degree)
-5.02
-9000
-2.50
0.00
0
0
5.02
9000
2.50
-3
-2
-1
0
1
2
3
-6
-4
-2
0
2
4
6
Angle
(degree)
APT Input (mm)
PITCH
