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This project has evolved some , the basic rundown is I'm modding two Omnibots , one a regular the other a larger 2000 model. I will have two ezb kits , rad base idea was thrown out because of so much noise but could go back on the table if the omnibot drivetrain is too weak to pull it.
By jstarne1
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Stock motors can pickup what I want , they are just all.dc motors so I got to.use several h bridges.
The gear shaft on mine is broken so I dont have any option but to use a direct drive. Unfortunately that gets in the way of the DC motors in there for the hand motion. If I were you, go with what Sam said. If it works, keep it.
here is a long post on selecting servo for projects selecting servo for a project
Yeah thd h bridge thing kind of sucks but I think it would've hard to replace the motors with servos.
@glickclick for using gear motors for drive motors,since you said you had one burn out try banebots,i get alot from them small size and high torque and low cost and gear motors little better to control the servo's second to keep your motors from burning out,also good to add a current brake to it and overheat sensor overheat sensor circuit fairly simple temperature device is a just a diode taped to a motor and simple op amp circuit current brake circuit is near the same ,you need a current sensing device,hall effect or sense resistor or coil then amp circuit (current to voltage) plus a simple comparator to set the setpoint
also ezb using a analog input will work using a hall effect current monitor both should be added for double protection and overheat sensor mostly comes on first also if you robot hits a rock or other item on the floor it will cause it to burn up (may be)
I didn't have one burn out. I was cautioning him not to get a motor that will draw more current than the little servo board can handle. Good point on the protection too.
can use any servo on a servo board,only need to remove the red power lead and use a higher current source,on ezb it does have a a way to do that,but i never use it many because i design my own source needed for servo's i am using (total stall current of all servo's),same with any sensor too ,only use signal and ground ,unless on a small robot design,other added item is i seperate the power from the sensors and motors for any noise or ,emf getting into the ezb ,its cause resets and other problems twisting power wires does help some,but better to seperate them too
Josh.... How many motors are in each arm?