brushlessmotor run at different values

my brushless motor will start at different values , i have attached it with esc and esc control signal is attached to arduino PWM signal and battery is 11.5v. i am using 30A ESC …please tell me what should i do to overcome this problem.

You should left a little bit more information. My crystal ball isn’t working today. :wink:

I don't really understand what you are saying either...

Do you have a schematic, and/or a link to the motor specs?

You may need to give a "jolt" of full power to get it started, or start at full-speed (100% PWM) and then back-off.