Hi,

You need 20000 micro seconds (20 ms) period.

Note that servo is very slow. You can limit the travel as much as possible, this will help a bit. You adjust the travel with the min and max pulse width. 

Regards,
Jostein

Ok, now works correctly, Thanks a lot! 

Hi, I have the necessity to rotate the servo hitec Hs785hb about 8 turns from zero, but with the setting above it turns only 6 turns from zero. Could you help me  Thanks

Looking at the spec, this servo has a special PWM range. You can set minimum 3% and maximum 12%, and you should get about 8 turns.

But as mentioned before, this is a super slow servo. You can try this setup, if you have a hard time controlling the system, then you should consider switching to either a faster servo or better: A stepper motor. 

Hi, 

I tried this setup,  the servo turn about 8 turns but have no necessary torque to complete rotate the oleodinamic pressure valve (problem is the servo, not the setup) . Is better  try a servo with more torque, about 27/30 kg*cm and more speed (how much speed is good ?)  or stepper Motor?

Yourdyno can control directly stepper Motor or is necessary the controller?

Regards

Eric

Stepper motor is much better. See this video for demonstration and explanation: 

https://www.youtube.com/watch?v=-Tbp4D09nOs