Hobbyking LED Servo Tester

 AUTOROTATION 222 points

The display reads 70- 230. This is adjustable by moving the dial. I'm not an expert but I am assuming this is not the degree but maybe the frequency you are asking the servo to move to. Example- 70 Hz is all the way counter clockwise and 230hz is all the way clockwise. If you push the button on the tester it will sweep from 70-230 back and forth slowly all by itself until you push the button again.

 AlexSolo 148 points

I suppose the digits are part of PWM impulse duration in uSec. Just add one more zero to trailing end of digits, like 700-2300 uSec. The middle point should be at 1500 uSec (i.e. 150 on display.) To be sure, I'll measure it with osciloscope, when i'll get it.

 Gary 2962 points

Do not really understand the question,this is a stand alone device,it does not require a Tx or Rx to work,just a 4.8/6v battery

 AUTOROTATION 222 points

Mine reads in the display 70-230. I'm guessing this is frequency?

 Gary 2962 points

The reading is milliseconds which determines the position of the servo's,1.50ms(150) usually being centre.Found this piece on the web which may help understand it a bit more. How do you communicate the angle at which the servo should turn? The control wire is used to communicate the angle. The angle is determined by the duration of a pulse that is applied to the control wire. This is called Pulse Coded Modulation. The servo expects to see a pulse every 20 milliseconds (.02 seconds). The length of the pulse will determine how far the motor turns. A 1.5 millisecond pulse, for example, will make the motor turn to the 90 degree position (often called the neutral position). If the pulse is shorter than 1.5 ms, then the motor will turn the shaft to closer to 0 degress. If the pulse is longer than 1.5ms, the shaft turns closer to 180 degress.

 AUTOROTATION 222 points

Is it possible to use this tester to run a esc up to speed on a prop dyno. Assuming I connected it to one of the four servo test ports? If not can you recommend a HK sold model that can do this?

 AlexSolo 148 points

I think it runs at 50Hz to be compatible with all types of analog servos.

 AUTOROTATION 222 points

I was wondering the same thing. Can I use this to run my dyno hooked to a esc. I want to use one of the four servo ports as a esc connection then adjust the dial to run esc up to speed. Is this possible. I have seen some videos doing this. But the only difference in the videos is that the led display reads the voltage sent to the esc not hz for the servos position. Is this possible to do?

 Gary 2962 points

Its perfect for this,use one all the time for this purpose.

 hotsam 250 points

hey buddy, check the fikles section - the attachment function didn't work here. you'll find the pics there. not the best tester tho, i suppose.

 Denniskzs 1 points

It's a great servo tester and also works well for centering your servos especially in helis.

 ARCDIRECT 162 points

Would you tell me how does it work .When centering servos ,once you center , then what .is this tester stay in the plane or once your done ,servos stay same as you set it .Thanks

 hotsam 250 points

No, this is just for testing servos: doe they work at all? do they go full range?what's the incremnet?. you can also center them of course. They will stay in position but next time you give them power they center. This does not stay in the plane - it's for your workbench. hope that hepls

 ARCDIRECT 162 points

Thanks , hotsam .One more thing ,is like what i have now my Futaba 9c calls sub trim ,if so .When i do sub trim it,ll center it but then will travel on one side more then the other .? Thanks again