For consistency, I'd recommend you buy some shaft mounted gears, such as some from Servocity. These utilize a set screw, so you don't have to deal with sanding down the rod to attach it more easily. Make sure you buy gears with the bore diameter you want (usually the width of the threaded rod including threads works fine), and gears with the same pitch to ensure good grip.How do you guys attach the gear to the threaded rod? Do you sand the rod down in one spot?
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Not sure what you mean when you say "without giving power to it"...Our motor does not move without giving power to it and the way we built our buggy, wing nut isn't free to move backwards without rotating wheels. Can we have another set of batteries that we could use to move the motor in reverse (essentially making wingnut move backwards)? Will it be allowed or not at the competition. Hope I made my question clear, let me know if it is not.
Now I'm curious as to what kind of motor you are using. As far as I know, I thought DC motors are all "free to rotate by hand", and in fact, act as DC generators when turned (they produce a current across the armature of the motor). Unless if you are leaving some sort of load after disconnecting power from your motor, there is no reason for a dc motor to resist change from being turned. Could you please explain to me how your circuit is set up:? ? I've never seen anything like that, so I'm super curious as to what motor you are using/how your circuit is set up.Thank you for your response. Just to explain myself, I thought the motor shaft would be free to rotate by hand but it does not. It does not move until current is passed through it. So to move the wheels backward, shaft needs to move which does not happen until we move the motor shaft backwards with another set of batteries.
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