Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: benji on January 25, 2008, 04:21:26 PM
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finally i got this baby in my hand,but surprize,, when i tried to move the shaft by hand ,,its hard, it doesnt move,, without having the servo plugged to anything,,, doesnt it have to draw current to maintain its position?
or once its clocked with a stable pulse,it just keeps the position without any current consumption?
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you answered your own question. it's so hard to move that no current is required
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only at center? or at any angle when you provide constant PWM?
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A small turn of the outer servo arm relates to many many turns of the internal motor. This means if you turn the servo horn like 10o, the internal motor will turn like 30 times.
Each time you turn the motor, it uses energy making and breaking magnetic fields. So if you are turning the motor 30 times, thats a lot of work to do.
It is possible to move the outer servo arm, but it is just really difficult.
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only at center? or at any angle when you provide constant PWM?
you tell it an angle. it will move there and stop. and no current will go to motor until it gets another signal
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it works otherwise right?
try turning it with more force . . .
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so when the shaft is not moving it doesnt draw any current as long as it is in the right position
,only current is drawn when it moves, so when moving 12 servos to a position to make hexapod stand it draws current untill the hexapod stands up
,then it doesnt need any current to maintain the standing position, am i right?
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yep
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thanks,, now i really love these servos :)