5.3.5. Home position settings¶
In the Application Settings Device configuration -> Home position
Home position settings window
Tab Home position sets the home position calibration parameters. Calibration comes to automatic accurate detection of the limit switch, the revolution sensor signal or moment of getting the external signal, which determines the zero position, and grading from it by a specified offset. It is helpful when the current location of the stage is unknown but we know the base point position relative to limit switch or some other signal, which is called home position.
Homing comes to the motor movement towards the predetermined (left or right) at until the signal from the source don't happen. Then the motor movement towards the opposite direction with the same speed until the signal from the source in the active state and continue half turn in the same direction. Then begins the precise movement in a given direction at . The speed is usually set low enough to keep the next signal. Motor stops, depending on the value, upon getting a sync input signal, signal from RPM sensor or reaching of the limit switch.
If the flag is checked the homing algorithm rotates the motor in a predetermined (left or right) with the .
If the flag is checked the motor ignores the end of the second phase signal during half a turn. It helps to set an unambiguous detection order for the sensors that have the first and the second movement phases signals close each other.
The third phase of homing is the absolute offset to the distance .
The resulting point is called a home position. It is important that its location on the stage does not depend on the calibration starting point.
option uses (see Settings of kinematics (stepper motor) page) for the first phase of homing to speed up the process.
Configuration commands are described in the Communication protocol specification section.