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- WARNING - Why do we have 5V and 6V servos & switchable BEC's etc ?
Many people get confused about input voltages for
radio system and servos.
The problem is that many servos are listed as capable
of operating on anything from 4.5V to 6V
Equally, Some ESC's or the BEC's provide switchable
output to let you choose 5V or 6V output to your radio system.
BE VERY CAREFUL
INDEED IF YOU CHANGE THESE...
It may seem obvious that the higher the
voltage, the more powerful the servos will be, and to a certain extent
that is true, so why don't we always just use the 6V setting.
The first thing you need to do is to
check your radio RX to ensure it is happy to accept 6V, some DO NOT.
If the RX is OK, move on to checking your
servos. If you have the EXACT same type for all your servos,
and it is suitable for 6V, then fine - go ahead. However, if you
have am mixture, which is quite common as many people use a more exotic
servo for the rudder, you must ensure that ALL OF THEM are 6V
The next question that comes up is are
your servos analog or digital. ? Why you may ask ?
Well, digital servos take more power to
drive them than the comparable analog servo.
Also, and even more importantly, you need
to check your ESC/BEC combination to see how many servos it is capable
of supporting at both 5V and 6V. You may be quite surprised to
discover that the ESC cannot provide enough power at 6V to handle your
basic 4 servos, much less any others you may have for retracts etc.
To go 6V you may have to get yourself a
more powerful ESC/BEC that can handle 4 digital servos at 6V.
A final warning - Check the gyro, as they
may not like a different voltage, and also, be very careful before
you connect the rudder servo to the gyro that it is the correct
type. Many gyros have a switch to let you tell it if the servo is
going to be analog or digital. If you connect the wrong type of
servo, you can FRY the servo or even the GYRO
SO, PLEASE BE
CAREFUL WHEN PLAYING WITH VOLTAGE SETTINGS AND MIXING SERVOS.