35
VALUE RANGE
Task number 1 - 12
Extend or retract undercarriage UP » DOWN / DOWN » UP
Servo number 1-6
Servo START position
700
µs – 2300µs
Servo STOP position
700
µs – 2300µs
Start time 0 - 25.0s
Stop time 0 - 25.0s
8. MANUAL DOOR SEQUENCER INSTALLATION
Select the DOORSEQUENCER point in the Main menu, and you will see this screen display:
The PowerBox door sequencer is an in-house development which offers unprecedented facilities
for the programmed movement of wheel doors. Right at the outset it is important to understand that
the system opens up entirely new possibilities.
For example, the sequencer does not constrain you to use pre-set modes, forcing you to adopt
fixed, pre-determined vectors for retracting and extending the undercarriage.
The PowerBox door sequencer offers innumerable options, because the modeller has the freedom
to define each step in terms of travel, sequence and timing. For example, all the wheel doors can
be set to open or close at entirely different speeds. It is also possible to set up multiple forward-
and-back sequences. If the full-size aircraft features a “jerk” when the legs lock, that can also be
simulated. The opening and closing processes can be set up entirely individually and independently
of one another.
In spite of the vast scope of these facilities, the sequencer is simple and user-friendly to set up, as
the screen and menu system guide you through the procedure. The sequencer software also featu-
res supplementary programming aids. Once you understand the principle, the system can easily be
programmed without recourse to the manual.
We always recommend that you start the set-up procedure using the Setup Assistant. This in-
cremental set-up aid creates the tasks required, automatically detects the retract switch channel,
and assigns the door sequencer outputs in the OUTPUT MAPPING menu. If you use the Assistant,
but find it necessary or desirable to alter the settings subsequently - perhaps to fine-tune the
timing - then this can be carried out using the menu points outlined below. To help you arrive quickly
at a satisfactory result, the following section lists the door sequencer functions in detail:
The primary component of the procedure is the TASK, which is self-explanatory: a task refers to
the movement of a servo from its starting point to its stop point with a defined start and stop time.
Twelve tasks are available for the retraction process, and a further twelve for extension. In total 24
different movement sequences can be programmed.
A Task contains the following information:
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