Servo does not move

[Acetronics2]

Hi, Ruijc

héhé ...

Futaba S148 !!! the "mechanical neutral" ( half of the two geometric max positions ) ... corresponds to ~ 1300 µS ( an heritage of the old Robbe/Futaba join venture ! )

Now ... YOU must place your servo arm to have your "application neutral" with a trustable 1500µS pulse !!! ( remember Xtals are NOT generating exactly their nominal frequency ... especially for "common" ones )

Moreover consider Futaba "analogic" servos have a quasi-linear positionning in the 900-2100 µS range .

Outside those limits, you can send from 200 to 2500 µS pulses ... but with no more linearity at all !!! Specially at low values ... ( I did those tests to try to get 180° travel without any mod to the servos ...)

to fill the "bottle" ... your servos have a deadband of ~ 4/5 µS ... around their position, so, don't ask them to show you 1µS steps !!!

I did not test any Hitec servos ... so don't ask me for them !!!

Alain