Servo wiring help
05-17-2009, 10:04 AM
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Servo wiring help
Hi folks.
I am adapting hobby-grade electronics to a wal-mart special. The problem I've got is the two-wire servo (a simple electric motor I believe) in the truck. I've tried to get it to work off the three-wire receiver output (futaba) but no luck. The only thing I can get it to do is supply constant power to the motor, ignoring the transmitter.
Is this possible or do I have to rig up a 'real' servo? I sortof wanted a fast, simple setup so I was trying to retain the 'factory' steering.
I am adapting hobby-grade electronics to a wal-mart special. The problem I've got is the two-wire servo (a simple electric motor I believe) in the truck. I've tried to get it to work off the three-wire receiver output (futaba) but no luck. The only thing I can get it to do is supply constant power to the motor, ignoring the transmitter.
Is this possible or do I have to rig up a 'real' servo? I sortof wanted a fast, simple setup so I was trying to retain the 'factory' steering.
05-17-2009, 10:55 AM
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RE: Servo wiring help
If the servo you're using only has 2 wires then it won't work with any of the current technology transmitters or receivers.
I'm guessing that the 2 wire servo works like a DC motor where current flowing in one direction drives the servo one way and current flowing in the opposite direction drives the servo the other way.
Current RC equipment drives the servo using PWM, or "Pulse Width Modulation" where the receiver sends the servo a square wave of varying widths which tells the servo which way to turn and how far to go.
Bill
I'm guessing that the 2 wire servo works like a DC motor where current flowing in one direction drives the servo one way and current flowing in the opposite direction drives the servo the other way.
Current RC equipment drives the servo using PWM, or "Pulse Width Modulation" where the receiver sends the servo a square wave of varying widths which tells the servo which way to turn and how far to go.
Bill
