servo

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servo

Postby aces » Wed Sep 23, 2009 1:33 pm

which servo can be used for self balance robot? - (in cytron product)
i need one which have good response to my IMU and pic16f877a..
it should be continuous rotation?
could suggest me one? :P
aces
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Re: servo

Postby hyng » Wed Sep 23, 2009 4:16 pm

I would suggest you use Stepper Motor instead of servo motor. The angle of rotation which is quite critical for self balance robot cannot be control if you use modified servo motor (which can rotate continuously). So you can try to use the stepper motor which is more precise in rotation. Cytron comes with stepper driver which enable you to control stepper motor as easy as 123. :)
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Re: servo

Postby aces » Wed Sep 23, 2009 5:09 pm

ok..
but i think that the position control is not the major factor..
maybe i dont need one..
servo is easy caused it can be control directly using the pic right...?
so can u suggest one?
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Re: servo

Postby hyng » Wed Sep 23, 2009 5:48 pm

If you dunwan to use Stepper Motor, you can go for DC Motor which the torque is more higher than Servo Motor. The response for servo motor is very slow if compare to Stepper Motor or other DC motor. I wont suggest you to use the servo motor. But actually cytron only has one type of modified servo motor (rotate continuously) - C36S. You can go for other servo motor but you need to modify it yourself. BTW, you still need extra circuit like motor driver to drive the cytron modified servo motor. That's mean you cannot connect the servo directly to PIC if you use cytron modified servo motor.
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Re: servo

Postby aces » Wed Sep 23, 2009 6:17 pm

ok.. i got it now...
any dc motor will do?
which is good--the price, specs and ease of use..
consider i will use l298 h-bridge...
did cytron got any?
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Re: servo

Postby A380 » Fri Sep 25, 2009 12:52 pm

aces WROTE:any dc motor will do?
which is good--the price, specs and ease of use..
consider i will use l298 h-bridge...
did cytron got any?


this is depend on ur robot weight and size. can u let me know what is ur robot dimension and the weight (estimation)? so that i can suggest a most suitable motor for u.
anyway, i still suggest u to use stepper motor due to it has accurate speed and no need feedback at all. if u use dc brush motor, u should do a speed feedback system. the speed value of the motor is very critical for balance robot, right?
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