Humanoid Head Calibration


Servo EZ-Bits may need calibrating. This process should only need to be done once per servo. This is a physical process, in which you will require a screw driver to remove the EZ-Clip to realign it at 90 degrees. This process is very easy and is highly recommended before building your EZ-Robot.

What You Will Need

  • No. 1 Philips Screw Driver
  • Flat Head Screw Driver
  • Your Robot Body (JD, SIX, Roli) or the Power Base from the developers kit
  • Freshly Charged Batteries
  • An EZ-B v4
  • A PC with EZ-Builder Installed
  • EZ-Bit Humanoid Head to be calibrated

Step 1

Insert the EZ-B v4 into the robot body or powerbase

Step 2

Turn the power switch to the ON or 1 position. Early Revolution robots have a power switch labelled ON/OFF, while the newer robots are labelled with a 0/1.

Step 3

When the power switch is turned to the ON position, the EZ-B will be flashing Blue. This means it is ready for a Wi-Fi connection.

Step 4

Locate the EZ-B Wi-Fi Access Point in your Wi-Fi Networks List. This is accessed by pressing the Wi-Fi button on your system tray.

Step 5

Load EZ-Builder and press the Web Configuration Access button on the Connection Control.

Step 6

Your default web browser will open to the EZ-B v4 Wi-Fi Web Server home page. Press the Diagnostic button from the left side menu.

Step 7

The Diagnostic page will now be displayed. Press the button labelled "All Ports Servos 90 Degrees". This will set all 24 of the digital ports on the EZ-B v4 to 90 degrees. Any servos that are connected to any digital port will now move to what it has been calibrated as 90 degrees. In the next steps, you will see how to calibrate the servo to be aligned at 90 degrees. You will repeat the next steps one at a time per servo.

Cable Descriptions

The Humanoid Head has 2 servos, RGB LED Array and a camera. Each device within the head has a cable for connectivity. The cables are:

  • a) Horizontal Servo. Turns the head left and right.
  • b) RGB LED Array Cable.
  • c) Camera Cable.
  • d) Vertical Servo. Tilts the head forward and back.

Step 8

Connect the Vertical Servo wires to any of the EZ-B v4 digital ports to view the calibration position.

*Note: Do not disconnect the servos from the EZ-B v4 until instructed to do so.

Step 9

Once the vertical neck servo is connected to the EZ-B v4, it will move to what it thinks is 90 degrees. Consult the image above to see what 90 degrees should look like.

Step 10

Use a No. 1 Philip Screwdriver and remove the screw which attaches the lever to the servo.

Step 11

We will now separate the servo from the lever. The side of the lever which the servo gear inserts might be tight. Use a flat head screwdriver to gently pry the plastic lever from the servo gear.

Step 12

The servo will separate from the lever.

Step 13

Connect the horizontal servo to any of the EZ-B v4's digital ports. The servo will move into what it thinks is 90 degrees.

Step 14

Now we will consult the horizontal servo to verify the calibration. In the photo above, notice how the horizontal servo should be positioned.

Step 15

Use No. 1 Philips Screwdriver to remove the screw which attaches the lever to the horizontal servo.

Step 16

Pull the lever off of the servo gear to separate and detach.

Step 17

Attach the lever to the servo in the same direction as the above photo. Notice the orientation of the lever alignment. Ensure the lever is positioned the correct way as in the photo, or the servo will not attach correctly.

Step 18

Use a No. 1 Philips Screwdriver and tighten the screw into the lever and servo gear. Tighten snug, not overly tight. The screw holds the lever onto the servo gear to prevent slipping. It does not need to be incredibly tight, which will warp the plastic.

Step 19

Attach the vertical servo to the lever. Take note of the angle that the servo is installed to the lever. The Servo is aligned at a right angle (90 degrees) from the lever.

Step 20

Insert the screw and tighten with a No. 1 Philips Screwdriver. Tighten snug, not overly tight.

Repeat and Complete

You have now calibrated your Humanoid Head. Disconnect the servo from the EZ-B v4 and place it with other calibrated servos. You may now repeat this process and calibrate another servo by returning to Step 8.

Last updated 1/9/2015

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This lesson applies to multiple robot products. Select your product below for related lessons.

Revolution JD
Revolution JD