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Author Topic: URGENT! need help for servo motor  (Read 970 times)

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Offline oltion28Topic starter

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URGENT! need help for servo motor
« on: May 31, 2012, 01:20:57 AM »
Hello every one, I'm a electronic engineering student at Polytechnic university of tirana (Albania).
Now I have a course work and I've choose the 50$ robot.
Can somebody help me for the servomotor hs-311?
i want to know the schematic explanation, how to control it with pwm and something else. I want a material in detalis about this and is URGENT for me.

Offline newInRobotics

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Re: URGENT! need help for servo motor
« Reply #1 on: May 31, 2012, 01:37:08 AM »
Have You tried Google;) And, say, top result: 05 - Example :- Driving a servo via PWM;D
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Offline oltion28Topic starter

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Re: URGENT! need help for servo motor
« Reply #2 on: May 31, 2012, 03:20:14 AM »
Yes I've tried but i want a material that explain the circuit of the servo hs-311, with H-bridge. A material with specific details. thank you

Offline newInRobotics

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Re: URGENT! need help for servo motor
« Reply #3 on: May 31, 2012, 03:33:22 AM »
Just to make it clear, do You actually want to understand how circuitry in servo works, or how to control it using PWM?

In both cases Google is Your best friend. Servo control by PWM is explained in my previously posted links; as for servo internals, Google helps a lot; one of the first Google suggestions is How RC Servos Works article. I'm not sure, but I think that HS-311 operates the same way any other standard analog servo does: pot is used to determine current angle, normal DC motor with gearbox to output rotational movement, some IC to: detect PWM and translate to angle, check pot voltage and compare it against PWM value, output voltage to control motor.
« Last Edit: May 31, 2012, 03:34:49 AM by newInRobotics »
"Computer games don't affect kids; I mean if Pac-Man affected us as kids, we'd all be running around in darkened rooms, munching magic pills and listening to repetitive electronic music." - Kristian W

Offline oltion28Topic starter

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Re: URGENT! need help for servo motor
« Reply #4 on: May 31, 2012, 04:30:14 AM »
i want both. thank you very much, here in albania we have other technical language and i was confused with google. Anoher time thanks because i've found what i need --> http://pcbheaven.com/wikipages/How_RC_Servos_Works/
:D :D

 


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