Solving RC Car Motor Problem - Get Expert Help

[RAHIL008]

hi,
I have a RC car that uses 27mhz radio frequency and 8v power supply.
The motor(6v,possibly)that rotates the wheels runs with interruptions,i have tried
adding two new 0.1Microfarad capacitors(ceramic)in the same way as they were from the manufacturer, bit it didnt help,maybe the polarity matters.
I can't figure out the problem,please help
thanks

 

[rcgldr]

The purpose of the capacitors is to reduce voltage spikes that feed back into the motor controller, also reducing electrical noise that might effect all connnected electrical components, including the receiver. Each capacitor should be connected to one of the leads and the can of the motor, using the can of the motor similar to a common ground reference.

It would be difficult to diagnose the problem without swapping components, such as the motor controller (ESC), receiver, ... . Assuming the car also has servos for steering, do they move smoothly or do they jitter?

Did the RC car operate without interruptions before, and if so, what has changed?

Running a "6 volt motor" at 8 volts might be pushing it, although most "6 volt" motors can handle 7.2 volts.

 

[RAHIL008]

thanks, but thing is that previously there used to be a smaller motor and replaced it with a bigger one, that's the only thing that has changed.

but I don't htink the problem is with motor, even if I conect a bulb instead of motor it also
blinks and does not light continuosly.

Is the whole receiving unit faulty?
may be the VOLTAGE REGULATORS are not working properly, if yes, then how to trace which one?

But thers one thing, when i touch the antenna, the motor stops jittering.
Would grounding the antenna help? and how to ground it?

 

[rcgldr]

You don't want to ground your antenna.

If the only component changed was the motor, and now you have a failure condition, then it's mostly likely a problem caused by the motor, such as excessive current or voltage being drawn by the motor. What size motor is your car's motor controller rated for?

 

[PJC01]

As a scientist, my first suggestion would be to check the power supply and make sure it is providing a consistent 8v. Fluctuations in voltage can cause interruptions in the motor's performance. Additionally, I would recommend checking the connections between the motor and the power supply to ensure they are secure and not loose.

If the power supply and connections appear to be in good condition, then the issue may lie with the motor itself. It is possible that the motor is not receiving enough power to run consistently, which could be caused by a faulty capacitor or a malfunctioning motor.

I also suggest checking the motor's specifications to confirm that it is compatible with the 8v power supply. If the motor is designed for a lower voltage, it may not be able to handle the 8v supply and could be causing the interruptions.

If none of these solutions seem to solve the problem, I recommend seeking expert help from someone who has experience with RC cars and motors. They may be able to provide more specialized advice and troubleshoot the issue more effectively. Good luck with your RC car!