I assume it's because the servos don't know their position when you first power them on... I might be wrong on that though

ive try everything i can think of , its like wierd

I have the exact same issue. I have a script at connexion which move some servos to a defined position. If the script is launched after a shutdown/power-up, the servos go crazy and move suddenly to an unexpected position, then they go to the defined position in the script. If I just disconnect the board and reconnect it (no shutting down), there is no problem... I am also puzzled...

i think we need dj opinion on this too

I have just tried again and observed carefully what happens. It seems that all servo try to go to position 0 before going to the expected position... and as none of the servos is able to go to 0 (limit is more around 10-15), it gives a strange and scary result. I agree, we certainly need DJ expertise...

yea i see the same going on fully max on servo, then it goes to the position i told it to got too, DJ we need you it cause my robot to bracket the come lose alittle its like whip lash. when it rotate the neck.s. cory

I don't know how that is possible. Post your project.

@DJ, I am at work now (time difference with US ) but i will post my project when I am back home. Thanks.