DSS-M15S 270° 15KG DF Metal Servo with Analog Feedback (แท้จาก DFRobot)

Introduction

Specification

• Operating voltage: 4.8-7.2V

• Operating speed (no load): 0.18 sec/60 degrees
• Resting current: 80mA
• Locking torque: 11.5KG*cm
• Stall current: 1.4A
• Standby current: 4mA

• Operating speed (no load): 0.16sec/60 degrees
• Resting current: 100mA
• Locking torque: 12KG*cm
• Stall current: 1.76A
• Standby current: 5mA

• Gear material: metal gear
• Operating angle: 270 degrees
• Wiring gauge: 28PVC
• Data line length: 320mm
• Gear bracket spline: 25T/5.80
• Gear ratio: 310:1
• Size: 54.5*20*47.5mm

• Feedback signal: 0-3.3V
• Control signal: RC PWM
• Pulse range: 500-2500 us
• Median signal value: 1500us
• Clockwise rotation: <1500us
• Control frequency: 50-330Hz (Arduion compatible)

Documents

Shipping List

• DSS-M15S 270° servo with analog feedback x1
• Crossed horn x1
• Long straight horn x1
• Short straight horn x1
• M2*8 self-tapping screws and gasket x5
• M3*6 screw x1

Servo Overview

Relationship between Angle & Analog value

Formula: Actual angle = Analog value degree *0.47-33.4

Before Usage

There will be some error between each servos. If you want to use the servos with scenes that require precise control, you can calibrate them separately. A quick three-point calibration method is provided here:

• 1. Drive the servo to 90 degrees (1500us), record the actual angle as reference angle A, and record the corresponding feedback analog value a;
• 2. Drive the servo to 0 degrees (500us), record the actual angle as reference angle B, and record the corresponding feedback analog value B:
• 3. Drive the servo to 270 degrees (2500c), record the actual angle as reference angle C, and record the corresponding feedback analog value C

The following formula gives the relationship between Analog value & Angle:

• Actual angle = m * Analog value n
• m=[(A-B)/(a-b) (C-A)/(c-a)]/2
• n=[(Ab-Ba)/(b-a) (Bc-Cb)/(c-b)]/2

If you doesn't need such accurate value, you can use m=0.47;n=-33.4 directly.

Tutorial

Requirements

• Hardware

  • DFRduino UNO R3 (or similar) x 1
  • SER0044 DSS-M15S 270° Metal Servo
  • M-M/F-M/F-F Jumper wires

• Software

  • Arduino IDE, Click to Download Arduino IDE from Arduino®

Connection Diagram

Sample Code

#include <Servo.h>

Servo myservo; // create servo object to control a servo


void setup() {
myservo.attach(9); // attaches the servo on pin 9 to the servo object
}

void loop() {
int pos = 0; // variable to store the servo position
uint16_t val;
double dat;

for (pos = 0; pos <= 180; pos += 1) { // goes from 0 degrees to 180 degrees
myservo.write(pos); // tell servo to go to position in variable 'pos'
delay(15);
val = analogRead(A0); //Connect Analog pin to A0
dat = (double)val * 0.47 - 33.4;
Serial.print("Position:"); //Display the position on Serial monitor
Serial.print(dat);
Serial.println("Degree"); // waits 15ms for the servo to reach the position
}

for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
myservo.write(pos); // tell servo to go to position in variable 'pos'
delay(15);
val = analogRead(A0); //Connect Analog pin to A0
dat = (double)val * 0.47 - 33.4;
Serial.print("Position:"); //Display the position on Serial monitor
Serial.print(dat);
Serial.println("Degree"); // waits 15ms for the servo to reach the position
}
}

Expected Results

Arduino will drive the servo with D9 pin, and receive the Analog feedback from A0 port.