speed control of servo motor

[dinesh401]

can you tel how to rotate the shaft of a servo motor slowly or fastly to the desired angle...

i understood how to rotate i.e by sending continuous train of pulses. but i can't rotate with my required speed. what to change in my c program. give me an example.

 

[milind.a.kulkarni]

Hi Dinesh,

First of which servo motor you are using .....if it is stepper motor....as stepper motor is one type of servo motor

There are two ways at least I know by which you can control the speed of the stepper motor

1) After every step in the servo motor control .....there is dealy between the steps .....if you control or change that dealy .....you can control the speed of your motor......

2) If you are using let say four pole stepper motor and applying sequec for A B C D like 1000,0100,0010 and 0001 for single step operation you can make it double where you need to do sequece like 1100, 0110,0011 and 1001 for two step operation.....

Good Luck

 

[kak111]

I guess you are meaning RC-servo.

Here is some info ...........

RC servo speed control
Pololu - RC servo speed control

Servo Slow-Down

CCS :: View topic - Need Help on RC Servo Ramp (speed)

 

[jpanhalt]

And here's a non-microcontroller method: RC Groups - View Single Post - Schematic for slowing servo

It is also said that increasing the time between pulses from about 20 mS will slow the response, but given a choice, I think the methods mentioned by kak111 or in the above link are preferable.

John