We are going to make this slave robot which parts are 3d printed. The robot has 11 motors including the head motor and 2 motors for legs. But in this episode, we use only 8 motors. Since we already made most of them, all we have to do is just printing parts and assembling them together. Let’s get started!

In the previous episode, we made the master robot which has 8 potentiometers.

We printed out all of parts, assembled and successfully tested.

The robot sends its angle value over the wireless signal through HC-12 module.

I designed all of 3d files and uploaded them on Thingiverse. Download the files and print them one by one.

• https://www.thingiverse.com/thing:2899499

These white parts are for making a group of two motors. we are going to make 8 modules.

they look all same but they are not. 4 parts are mirrored against others. they are used depending on the location of each joint. If you follow this video carefully, you can easily make it.

they are used depending on the location of each joint. If you follow this video carefully, you can easily make it.

the parts we are looking at are for the body.

we are going to make shoulder frames.

we are going to make shoulder frames. when inserting the motor into the frame, the most important thing is to insert it at the mid-point. as you can see, I turned it to the left and right. Tested and plugged it at around middle. We don’t need to be perfect because we can adjust them to some extent later.

Usually, such a small servo motor has only one axis of rotation. In order to build a humanoid robot, it must be mechanically supported on both sides of the motor. Otherwise, it cannot stand its weight. The white parts are for supporting the other side by using a bolt.

Now, we are going to make elbows. In this way(YouTube video), I found the middle of the motor. The horn is slightly long so I cut the end slightly. please Wear safety glasses when cutting using a nipper

When fixing the opposite side of the motor drive shaft, do not turn it all the way. Just fix it slightly. Normally, bearings are supposed to be here but this kind of small size robot is enough with this technique. The elbow motors also need modification. Attach the cover.

The elbow motors also need modification. Attach the cover. we need two motors modified. Assemble 2 elbows. The left arm and right arm are different. Please check the YouTube video carefully. Hand frame may be changed later. The look of the robot can be changed depending on the shape of the hand

Assemble all of the arms. Make sure to connect the frame on the midpoint of the motors.

Assemble the bottom frame and front frame

I am going to put the head. Head frame design maybe changed later. considering the functional aspect of the robot, the head has no function. After long consideration, I finally decided to put an extra motor for the head. because this robot is not for functional but for emotional

I am going to make a frame to temporarily hold the body. I also ate Pringles again. Use a hot melt glue to connect the lid to the body.

Make a hole on the lid. The cable will pass through the hole. Connect the cables to the board one by one like picture and video. If you don’t understand this board, please refer to previous episodes. The usb cable and power cable also pass through the hole and connected to the board

Finish the board with an isolation tape. As mentioned in the previous episode, The Pringles bottom is made of aluminum. I cut the plastic and put it into the bin to prevent the circuit.