TRACKING TUTORIAL
D-5
Example: Start AZ Angle: 95.00; After 60 seconds; Ending angle 98.00
(98.00-95.00)/60 = 0.05 Actual Track Speed
Using this information, we can calculate the value that needs to be entered
in to the AC Inverter.
Check NO25 in Inverter. Enter Actual value.
Example NO25 = 5.0
Optimal Speed Value = (Optimal Track Speed X Value NO25 ) / (Actual Track
Speed)
Example: (0.066 X 5) / 0.05 = 6.6 Hz
Reset NO25 to 6.6 Hz.
You are now set to your Optimal Track Speed.
C. You will now need to repeat this procedure for the Elevation Axis
D. After completing this procedure, you may have to fine-tune these speeds to
obtain a track speed that is the best speed for Step Track and OPT.
Consult with General Dynamics for help with this setup if needed.
In normal environments, no other steptrack defaults require modifications from the
preset values. The OPT defaults should remain at factory settings also.
14. From Main menu…, select Edit System configuration… and Position loop
parameters… .
15. Select Positioning deadband [deg]. This parameter determines the accuracy of
the position loop. The position loop will continue to move the antenna from
the current position to the target until the antenna is within the deadband
value for each axis. A small value will increase the accuracy of the position
loop; setting this value too small will cause the antenna to oscillate. For
standard resolvers this value should not be less than 0.01, for 2-speed
resolvers/optical encoders this value should be around 0.003.
16. Select Inching on time [ms]. This parameter needs to be set just high enough
to allow the antenna to move (usually 1 revolution of the motor). Setting this
parameter too high can result in oscillation. This value can be 200-500ms
depending on the amount of backlash in the drive train. For other antennas
with excessive wear, the value could be somewhat higher.
The next step in the tracking sequence is to build a target.
To Next Page
Loading...