Robotc servo how to#
Robotc servo install#
Robotc servo code#

Replace вЂњ/dev/ttyACM0вЂќ with the port name to which your Arduino is connected.

Look out for this line: port = new Serial(this, вЂњ/dev/ttyACM0вЂќ, 9600).

Open the file alpha_writer.pde thatвЂ™s in the article downloads.

The more rigid the robot is, the more accurate the letters written will be! It makes servomotor 1 ( myservo1) and servomotor 2 ( myservo2) move to certain angles with a delay of two seconds in between each transition. If button A is pressed, that value is sent to the microcontroller.

Robotc servo code#

The following block of code tells you that the letter A will be written if the button A is pressed in the GUI (covered next):

Remember to keep the board connected to the computer until the end of the project. Connect the Uno to the computer and upload the code. Open the Arduino file that is included with the downloads for this article.

Robotc servo install#

Open your computer and install the Arduino software. Here, servomotor 1 is the grounded motor and servomotor 2 is the motor that is attached to the link connected to servomotor 1.ДЇinally, connect the male-to-male jumper wire from the ground pin of the Uno to the ground in the breadboard. Pins 10 and 9 are given to the servomotor as 1 and 2, respectively. From this, the power is distributed to the two servomotors. This is the end effector.ДЇIGURE 5: The assembled robotic arm ready to write the letters.ДЄ breadboard is used and the 5V 1A power is attached to it. Your two-link robotic arm is ready and should resemble Figure 4.ДЇIGURE 4: The color pen attached to the L clamp made of sheet metal. Refer to Figure 3.ДЇIGURE 3: The second link of the robotic arm is made by attaching to the horn of servomotor 2.ДЄttach the servo horn with the ruler and pen to the second servomotor. Next, attach the L clamp to the end of the ruler so that the pen or pencil can be attached to it. The second servomotor is attached to the other end. YouвЂ™ll now need to make a similar horn and ruler setup as shown in Figure 2.ДЇIGURE 2: The first servomotor is attached to ground. Your setup should look something like Figure 1. Attach the second servomotor to the other end of the ruler. Attach the ruler to the servo horn using the nuts and bolts. Building the Two-Link Robotic ArmДЇind a big pad or a table and fix one of the servomotors to it. A 5V 1A power supply is required to power the servomotor. An Arduino Uno with a USB-UART cable is the microcontroller I used. An L clamp or a piece of sheet metal that can be bent into an вЂњLвЂќ shape is needed to hold the pen or pencil using a paper clip.ДЄ few male-to male jumper wires are needed to connect the servomotors to the microcontroller. Try changing the initial angle of the mechanical robotic arms and youвЂ™ll find differences in the font style!ДЄ drill and a few nuts and bolts are necessary to fit the wooden or steel ruler to the servo horn. Next, is two 30 centimeter wooden or steel rulers to make the links of the robotic arm.

For this, weвЂ™ll need two servomotors with at least 10-15 kg cm torque for better results. Make Sure You Have These to BeginДЇirst, weвЂ™ll be making the two-link robotic arm. You can see what itвЂ™s writing in the camera using the Graphical User Interface (GUI). The robot arm writes a designated letter on a piece of paper when a particular button is pressed on the screen thatвЂ™s part of the build. Once you have all the required materials, it will take about an hour to complete the build.

Robotc servo how to#

In this DIY project, IвЂ™ll show you how to make a simple computer-controlled letter writing robot from scratch. At the end of the robot, thereвЂ™s an end effector which, in our case, is a pen to write the letters. ItвЂ™s called a 2R robotic arm since it has two revolute joints connecting two links. Figure 1 shows the simple two-link robotic arm.ДЇIGURE 1: Representation of a simple two-link robotic arm with joints and end effector. While doing that class, our professor came up with an idea that a simple two-link robot could be used to write letters. IвЂ™m glad itвЂ™s now possible to make this happen.ДЄs I moved forward to do my Masters in Advanced Manufacturing, I had a course on industrial robotics. I always wondered why there couldnвЂ™t be a robot that would do this task of writing homework for me. Back from my school days, I remember my teachers giving homework that involved a lot of writing.