PowerBox Systems PowerBox Cockpit SRS Instruction Manual page 26

The positional values vary according to your linkages, and must be
adjusted to suit your individual model. Clearly it is important to avoid
your wheel doors jamming (striking their mechanical end-stops). The
timing values shown here should also be set to suit your requirements.
The task numbering does not need to coincide with the timed sequence;
for example, TASK 5 could be set to run before TASK 2.
Our example clearly shows how the function is built up. Additional
movements or intermediate stops when the doors open or close can be
added at any time; all you need is to set up a new free task. Viewed
overall, there is now no reason at all why the retraction and extension of
the undercarriage in the model should not exactly emulate that of the
full-size aircraft. In other words: you can give free rein to your
imagination.
Note: if you wish simply to switch servos or valves on or off, you must
always enter a time difference in the sequence, as the door sequencer
needs a small amount of time to carry out its calculations. The following
is an example for a retract valve:
The time lag of 0.1 s is sufficient, and is virtually unnoticeable in
practice.
Important: the first START POSITION at UP » DOWN must always
coincide exactly with the last STOP POSITION of DOWN » UP. This
simply means that the last task must cause the servo to return to its
starting value, regardless of any individual intermediate steps you
create! If the wheel door servos carry out unusual or unexpected
movements when you try out the programmed sequence, please check
your tasks!
DOWN » UP means undercarriage
retraction. In this example, when the
switch is
immediately starts running slowly
from the left to the right servo
end-point (Start time 0.0 s).
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operated, the servo