Servo problem

Hi all,

This is first time, I'm using Arduino with servo, I've a problem with servo rotate degree, why I can't rotate servo to 180 degree, it just move in 1 degree.

I've used UNO firmata and external DC 9V 1.2A power adaptor for standard servo.

Any advice?

Thanks before

Replies to This Discussion

Permalink Reply by Andy Payne on April 15, 2012 at 1:54pm

Hi Yasser,

The main reason you're having problems is that you haven't told the output pin what type of data you're trying to send out... in this case it should be Servo. I can see from your image that all of the output messages are set to "LOW" which is a digital signal (and not a servo signal). If you right-click on the DPin11 input and set the input state to Servo, then you should be able to control your servo from 0-180 degrees.

Also, your circuit setup is a little strange to me. Basically, you should be able to control 1 servo just from the Arduino board (connected to your computer). You don't really need an external power supply You can basically connect the GND pin from your Arduino directly to the GND wire on your servo... you can connect the 5V Output pin on the Arduino to your Power line on your Servo... and your Signal wire on your servo should go to Digital Pin 11 (according to your screenshot). Of course, you can use an external power supply if you want... but it may be more complicated than is needed (plus, I'm not sure why you need to use that blue adapter at the left of your picture). Anyway, just a suggestion.

HTH,

Andy

Permalink Reply by Yasser Hafizs on April 15, 2012 at 2:23pm

Thanks Andy for quick reply,

I'm sorry for not add specific question. Yes,I have select PWM output before and it move just 1 degree, because if I used Servo output, it can't move.

Yeah, first time I've used power from Arduino board too, but have'nt enough power, then my port Usb laptop got error when plug-in from Arduino board, in UNO write component said "runtime errors: Solution exceptions: The port COM31 does'nt exist". When I said to servo seller, they said I need DC for external power supply.

Permalink Reply by Yasser Hafizs on April 15, 2012 at 4:04pm

Finally, my servo dancing to 180 degree :D

I switch adapter to 6V and share ground (black wire) from adapter to Arduino board GND.

I find it in this discussion: http://rcarduino.blogspot.com/2012/04/servo-problems-with-arduino-p...

Thank you so much to Andy Payne, for great plug-in.

Permalink Reply by Andy Payne on April 15, 2012 at 4:55pm

Great. Glad you got it fixed.

-Andy

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