User manual PowerBox Professional

22 PowerBox-Systems − World Leaders in RC Power Supply Systems
CAUTION: The Frame-Rate setting should only be changed if you are cer-
tain that your servos are designed for the Frame-Rate you wish to use. In
the extreme case please note that the servo may lose its triggering, and
become “soft”.
6. CHANNEL LOCK WHEN UNDERCARRIAGE IS RETRACTED
The PowerBox Cockpit’s door sequencer also features one last unique fun-
ction: it is now possible to switch a channel off when the undercarriage is
retracted. The purpose of this feature is to prevent the retracted nosewheel
moving inside the fuselage when the pilot gives a rudder command, as this
may cause the mechanical system to jam. The function can be found under
GEAR UP – OUTPUT OFF in the Door Sequencer menu. Simply use the Sen-
sorSwitch to select the output which you wish to disable when the undercar-
riage is retracted. Select the output, and conrm your choice with the SET
button; at the same time the system stores the position of the nosewheel
servo at which it is to remain.
CAUTION: This function is extremely useful, but it also creates a danger:
if you accidentally include a control channel (e.g. elevator) in your pro-
gramming, the control channel will then be switched off when you retract
the undercarriage after the model takes off. This will usually result in loss
of the model!
7. FRAME RATE:
What does ‘frame rate’ mean?
This value indicates the time interval at which the servo signal is refreshed.
Modern digital servos are unlikely to encounter problems with the 12 ms set-
ting, but older analogue servos may require a longer setting of 21 ms. For
more information on servo compatibility please contact the manufacturer of
your servos. A faster refresh rate causes the servos to respond more swiftly,
and they will offer greater effective torque because they are capable of coun-
teracting the forces acting upon them more quickly.