Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: yash25 on September 21, 2009, 11:42:12 AM
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Hi!
I'm building this robotic snake , with 8 servo motors. Out of them , 2 are modified servos and they propel the snake forward ( they've been modified for 360 degrees rotation) and the remaining 6 servos are controlled by a microcontroller board for the coiling action of a snake.
Now my problem is that the snake is'nt able to move as fast as required (i.e the modified servos aren't able to rotate that fast).
How do I increase the forward motion of my snake? Do I add some more motors or do I replace the modified servos with some other motors?
Also, has anyone tried to build sucha bot before?
Thanks
Yash, India.
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Bigger wheels and a faster servo will help... but the best way would probably be to replace the servos with gearmotors.
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Hi. Well I've never used gear motors before. So i barely knoe anything about them. Do they work on six volts like servos? and do they have to be modified too for 360 degrees rotation?
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They will work on 6v and they dont need to be modified. They are basically just normal electric motors that are geared down for more torque.
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but gear motors require a motor driver. it cannot be directly connected to a uC pin coz they require a lot of current.
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They will work on 6v and they dont need to be modified.
It will depend on if he wants to change the direction and controll the motor with presision, if yash25 just wants it to turn in one difrection it won't need a motor driver.
However if he wants it to rotate back and forwards with a MCU he will need a motor conrtoller, you can get an IC chip to do the job for 2 bucks.
They are basically just normal electric motors that are geared down for more torque.
the higher current just provides more torque to a un geared motor, the reason for a gear reduction is to provide more torque at an un modified operating voltage.
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It will depend on if he wants to change the direction and controll the motor with presision, if yash25 just wants it to turn in one difrection it won't need a motor driver.
However if he wants it to rotate back and forwards with a MCU he will need a motor conrtoller, you can get an IC chip to do the job for 2 bucks.
No im using the motors only to pull my snake in one direction...not changing the direction or anything. So can I connect it directly to four 1.5v pencil cells?
And Im not connecting these motors to an MCU.
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yes, connecting straight to a battery will do fine , good luck ;D
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Hi,
[...] if yash25 just wants it to turn in one difrection it won't need a motor driver.
However if he wants it to rotate back and forwards with a MCU he will need a motor conrtoller, [...]
A motor driver is needed in both cases - the only difference is the complexity of the driver!