RS-ST servo adjustment manual Rêve D
Torque : A Crucial Element for Adjusting Front-End Grip
The Importance of Torque in RC Drift
Torque is an essential factor for adjusting the front-end grip of your radio-controlled car. Good torque management can make the difference between understeer and oversteer, optimizing your performance on the track.
• Understeer : Occurs when front-end grip is low.
• Oversteer : Occurs when front-end grip is high.
Compatibility with the Road Surface
Torque adjustment must take into account the type of surface you are running on :
High-Grip Surfaces
• Black tiles
• Asphalt
These surfaces generally provide better front-end grip, therefore requiring lower torque to avoid oversteer.
Low-Grip Surfaces
• Concrete
• White tiles
These surfaces provide less front-end grip, therefore requiring higher torque to reduce understeer.
Adjustment According to Track Layout
Torque adjustment must also take the track layout into account :
• Straight layout : Lower torque makes rearward weight transfer easier.
• Layout with many corners : Higher torque makes forward weight transfer easier, improving cornering agility.
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Torque curve :
Analysis of the Differences Between “Torque” and “Torque Curve”
Torque adjusts front-end grip across the entire steering angle range, from initial steering input all the way to maximum steering angle.
The torque curve allows front-end grip to be adjusted from the mid steering angle up to full steering angle.
“Torque” Function
• Front grip zone for the 100/100 steering range.
“Torque Curve” Function
• Grip level from intermediate EPA up to full countersteer EPA.
When the curve value is high, the front end gains grip more easily in the second half of the steering range, which is particularly useful on slippery surfaces.
Layout Example
When following this track layout and reaching the apex of the corner :
Key Points
• The corner entry zone is crucial, and the countersteer increases. This is where the torque curve function comes into play to maintain high countersteer in aggressive corners.
• A high torque curve makes it easier to adjust the inside line.
• Conversely, a low torque curve makes it easier to maintain the outside line.
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Speed Curve :
When the speed curve is set to a low value, the steering closely follows the transmitter signal. On the other hand, a high speed curve will increase the steering angle beyond the initial signal.
Example :
• Transmitter steering wheel turned to 40°.
• Low speed curve : Steering angle is 42°.
• High speed curve : Steering angle is 55°.
Explanation of the Impact of the Speed Curve on Handling :
When the speed curve is set to a low value :
• The front end of the vehicle does not pull the vehicle forward, making it more prone to sliding.
• This gives an oversteer handling feel, making oversteer easier to induce.
When the speed curve is set to a high value :
• The front end of the vehicle pulls the vehicle more, guiding it toward understeer.
• This gives an understeer handling feel, making understeer easier to induce.
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Damper :
Damper Adjustment to Control Hunting (Servo Shaking)
By adjusting the damper, it is possible to eliminate steering hunting. However, please note that the damper acts like a brake on the servo, so if the value is too high, it can cause the servo to overheat and potentially damage its performance.
Precautions :
• If you set the value too high, the servo motor will heat up and there is a high risk of damage, which will result in a loss of servo performance.
Recommendations :
• Basically, if hunting does not occur, there is no need to increase the damper value.
• Hunting is more likely to occur when gain is high, so follow the recommended damper values in relation to gain.
Setup Recommendation :
• If you do not have any steering shaking, it is preferable not to use a high damper setting.
• If the gyro gain is high, shaking is more likely to occur.
Humorous Note :
By following these tips, you can forget about shaking issues and dial in your setup without any haunting worries !
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Damper point :
Damper Timing Adjustment
By adjusting the damper timing, you can change the driving feel of your vehicle.
Effects of the Adjustments :
• Increasing the Values : If you increase the value, the damper activates earlier, giving a heavier and more stable driving feel.
• Decreasing the Values : If you decrease the value, the damper activates later, making the driving feel lighter and more agile.
Adjust the damper values according to your preferences to achieve the desired driving feel, whether for stable and smooth driving or for light and responsive driving.
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Max power :
Servo Voltage Adjustment
By adjusting the servo voltage, you can uniformly change the torque, speed, and response.
Effects of the Adjustments :
• Reducing Voltage : If you want smoother, less aggressive movements, reduce the voltage.
• Increasing Voltage : Higher voltage will increase servo torque, speed, and responsiveness, delivering more dynamic performance.
For smoother movements and more fluid driving, reduce the voltage value. Adjust the voltage according to your needs to achieve the desired behavior from your servo.
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Frequency :
Servo Frequency Adjustment
You can adjust the servo frequency, and by increasing the value, the servo movement becomes smoother.
Effects of the Adjustments :
• Increasing Frequency : Makes servo movements smoother.
Setting for REVOX :
• The REVOX, with its very powerful gyro characteristics, is set to a high value to ensure smooth servo operation.
For optimal performance, adjust the frequency according to your needs, especially for powerful systems like the REVOX, in order to maintain smooth and efficient servo movement.
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Dead band :
Adjusting Servo Response from the Transmitter
You can adjust the servo response from the transmitter. By decreasing the value, the movement becomes more linear.
Effects of the Adjustments :
• Decreasing the Value : Makes the servo movement more linear, providing a more direct and predictable response to transmitter inputs.
Adjust the settings to suit your needs and achieve the desired responsiveness from your servo, allowing more precise and smoother control of your vehicle.
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Steering :
Changing the Servo Operating Direction
You can change the servo operating direction.
Effects of the Change :
• Direction Reversal : Lets you change the servo rotation direction to match your setup needs.
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SERVO TRIM :
Adjusting the Servo Neutral Position
You can adjust the servo neutral position for precise alignment of your controls.
Effects of the Adjustments :
• Neutral Position : Allows you to adjust the servo neutral point, ensuring that the servo is properly centered when the controls are in the neutral position.