Hi, Win

Servos pulses HAVE to respect those values ...

700 to 2300 µS high level @ 20 to 60 Hz

Not to create mechanical or electrical damage.

Sometimes it's possible to try a wider range, but it doesn't fit all brands ...

Your 50 value is out of range !!!

Just try a value in the 70 - 230 range ...

Note also the " @ 20 to 60 Hz " ... the pulse has to be sent every 50 to 15 ms ...

Alain

Alain