zero degree in servos...

[harisankarsa]

do we hav to turn the pot head so tht its zero rotation perfectly??
I had glued it.then found tht it was not turning due to a small loose connection.
and now it turns at a small rate when connected to the chip with zero degree rotation code...
pls help me fast...

[airman00]

its fine the way you did it


now you'll have to experiment to find how much off you are from the pulse

For example : its supposed to be 150 ( lets say) and now on your servo its 156. Play around to find the pulses for forward , backward , stop ( brake - which is the 0 degree thing you speak of)
                   
Also, may I ask what you are using the servos for?

[bukowski]

Think of it as zeroing a scale. If the scale has a wrong reference point for zero, the reading will be that far off. If the servo has a speed of x when it thinks it's zero, whatever input you give it will be input + x. See if you can carefully chisle out the glue, or disconnect the pot entirely and

take the pot out, and replace the pot with a resistor. 2.2k ohm IIRC

http://www.instructables.com/id/modify-the-hitec-hs-325-servo-for-continuous-rotat/

[bukowski]

or you can do it with software, like airman said. 
Im not exactly a great programmer, so I always look for a different solution.