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### Topic: Making a 90degree Servo turn only 90 deg? Stop servos from spinning on reset? (Read 782 times)previous topic - next topic

#### lolsniper

##### Jan 18, 2013, 05:32 pmLast Edit: Jan 18, 2013, 05:34 pm by lolsniper Reason: 1
Hello,
I am having problems with making a servo (a Turnigy TGY one, it's not with me and I forgot the model number. It's meant to turn max 90deg) turn 90 degrees only, on a Romeo V2.
What happens:
Upon execution of the code, the servos spin a couple of rounds (presumably to get to pos 0?),suddenly stop, then proceed to go to 90 degrees.
What I wish to achieve:
Go to 90 degrees only, without the spinning around
I am using the following:
Code: [Select]
`for(pos = 0; pos < 90; pos += 1)    {                                    servo90_1.write(pos);    servo90_2.write(90-pos);    delay(20);                        }  `
I have also tried the following. But similar to the above, the servos start spinning from reset.
Code: [Select]
`servo90_1.attach(servo90_1Pin);servo90_2.attach(servo90_2Pin);   servo90_1.write(90);                 delay(100);    servo90_2.write(0);       delay(100);                            servo90_1.detach();   servo90_2.detach();`

This is my first time programming so please bear with the clunky code. It's modified from a tutorial code with new additions.
The purpose is to build a robot which can achieve a series of tasks, one of which is collecting balls, and I'm lifting a ramp in order to do so.

I've provided the full code used, and it includes automated actions of the robot with the option to override with RC.

#### Msquare

If the servo spins round, then it is not a servo in the normal sense of the word. They are physically incapable of turning round, they are typically limited to a half a circle.

If you have a continuos rotation servo, then you must do something to get the position feedback. Of course, this may be a fancy new servo I haven't heard of, so give us a link / datasheet.

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