Spektrum SPMAR12200 - Manual (Page 12)

EN
12
Sequencer
The Cockpit unit supports door sequencer (DS) programming. Doors can be set to
open and close and gear to extend and retract as needed. Look at the unit to see the
six ports marked DS, 1 through 6, available for sequencing and timing. Plan how you
want to sequence and time what you connect using the information below. .
• Servo Position I: (Starting servo position, 700 micro seconds to 2300 micro
seconds)
• Servo Position II: (Ending servo position, 700 micro seconds to 2300 micro
seconds)
• Start Time (This can be set to a delay for the movement to occur, 0–9.9sec)
• Stop Time (This is used to slow the movement from the start position to the end
position 0–9.9sec)
Example
Values for the retraction/extension positions will vary according to linkages and
must be set up individually to suit your model. Ensure that the wheel and door
positions do not mechanically stall or block the servos and that the timing suits the
requirements of your model.
Sequence for retracting the gear
Task 1 is used to open the main wheel door when the transmitter switch is moved
from position A to position B. The selected stop time (three seconds) causes the
door to open slowly.
Task 2 controls the secondary wheel door. The servo for this function is installed in
the reverse orientation, as can be seen from the position values.
Task 3 is responsible for operating the nose wheel door. After a period of 3.5
seconds (set in Task 4), the gear is extended, and, after a brief pause, the wheel
door closes again.
Task 4 controls an electronic pneumatic valve for the retractable undercarriage.
The valve will open after a delay of half a second once the wheel doors have
reached their position; at this moment, it feeds compressed air into the air cylinders.
The switching points are programmed on the valve itself after the door sequencer
has been programmed.
Task 5 closes the wheel door that opened in Task 1 1.5 seconds after the gear is
extended. In this example, it closes even more slowly than when opened.
Task 6 closes the secondary wheel door of the main gear.