I 'm working on a school project by a robotic arm that use four servomotors , but I need to control the movement of them separately , that is to move joint by joint while everything else guard position , what matters most is the speed control because with the sudden movement has been disarmed my project several times.
Otherwise you could help me failing my area of specialty, please !!!! 
:o :o :o :o :o 
What is the control input for the servos?
All the sequence is totally automaticaly, for this reason is needly use the servos keeping position, i'm using a code where move the servo grade for grade but cant use this for 4 servos, excuse me for my bad english really i speak spanish
All the sequence is totally automaticaly,
Nonsense. The Arduino may be getting position data by generating random numbers, by reading from a file, by getting data from the serial port,etc. There is NOTHING automatic about any of the methods.
Hi,
There is a Spanish speaking part of this forum, have you tried there?
http://forum.arduino.cc/index.php?board=32.0
Tom.... 
I see you have, be careful, I'm not sure if it is classed a double posting.
i'm using a code where move the servo grade for grade but cant use this for 4 servos,
Can you post that code per #7 below:
TomGeorge:
Hi,
There is a Spanish speaking part of this forum, have you tried there?Tom....
I see you have, be careful, I'm not sure if it is classed a double posting.
And I asked the question openly in Spanish, but knew he could direct it to a specific audience, just as nobody answered the question in Spanish and just wanted to broaden my chances of finding results. thanks
Hi,
No problem, we just need to see your sketch that you are having problems with, and we will try to help.
Can you please post a copy of your sketch, using code tags?
They are made with the </> icon in the reply Menu.
See section 7 http://forum.arduino.cc/index.php/topic,148850.0.html
Thanks Tom...