Navitar Motorized Zoom Systems Instruction Manual for Windows
Revision B
Page 18 of 23
2/17/2004
The Position Command location is immediate, while the Position Indicator will
track the actual position of the motor.
14
Limit Indicator / Button
Directly above the Motor Position Indicator is the Limit Indicator / Button.
Clicking this button will cause the motor to drive to the limit sensor and stop
there. When the motor is at the limit, the indicator will light red. If the motor is
commanded to advance past the limit count, the motor will drive to the limit, stop,
and the indicator will remain lit.
15
Home Indicator / Button
Directly below the Motor Position Indicator is the Home Indicator / Button.
Clicking this button will cause the motor to drive to the home sensor and stop
there.
The motor operation at the home end of travel is slightly different from the limit
end. The motor will drive the magnet field into the sensitive area of the home
sensor, and then reverse direction, and advance slowly until the magnet no
longer impacts the sensor. The motor will stop at this point, calling it the
reference home zero position. Because of this homing action, the home indicator
will light up only briefly, while the magnetic field is within the sensor area. When
the motor is stopped at the home position, the indicator will not be lit.
16
Axis Count Window
Just to the right of the Limit Indicator / Button is the Axis Count Window. This
window presents to the user the maximum number of steps between the home
and limit ends of the travel. This value is determined at start up when the
controller drives the motor to home, limit, and back to home. This value is used
as a guide when setting up the individual way-points.
Note that this value may vary slightly in day-to-day operation. The differences of
one or two counts are due to sensor detection accuracy depending on the
maximum speed of the motor, the load on the motor, and environmental
considerations.
17
Jog Button, Jog Minimum, Jog Maximum Value Windows
Directly below the Axis Count Window are two Jog Buttons, Jog Up and Jog
Down. These buttons are used to command the motor to take a certain number
of steps in the desired direction. In connection with the minimum and maximum
values, the user can quickly and accurately position the motor at a desired count
using just a few clicks.
