montagem de robozinho humanide com arduino, programação de recursos como movimentos de dança e aproximação. O projeto usa na forma básica quatro servo 9g, um sensor ultrassonico; arduino nano, expanção de arduino nano, buzer e suporte para baterias AA de 1,5 volts. No programa do arduino existe em exemplos algumas programações de movimentos e testes do robozinho.

1. Otto Servo
Calibration
guide

2. Do you
really
need to
calibrate?

3. ● Also called “centering” or “homing”
● It is in the hardware a
“mechanical alignment”
● Most 180 degrees servo motors
have the rotation mechanically
limited
● Align the servos close to 90
degrees angle it is a requirement
in Otto to be able to walk or dance.
● If Otto is falling is because of bad
alignment in the servos, re-
assemble again
● “to Increase accuracy”
● It is made with software,
“electronic calibration”
● Calibration is ONLY required for
precise movements like "straight
walk" or standing in one leg.
(is optional not required)
● In any case you MUST align
servos as close as possible to the
center before calibrating. (+- 6
degrees)
Align Servos Calibrate Servos

4. Why is it not walking straight?
If you have carefully followed the instructions on how to build Otto
and have made sure that all the servos are aligned(set at 90
degrees) before you attach the arms good job you have a functional
robot that you can use for dancing and interactions.
Otto will move ok but not perfect.
😞 What happened?
Why Otto doesn’t walk straight and doesn’t move smoothly in certain
movements?

5. Otto needs
adjustments
Do not be disappointed and do not worry! This is completely normal
and happens in every Otto or robot built. This is the stage where you
need to adjust the central positions of the servos using a process
called “calibration”. This will only need to be done once per robot and
then the correct positions will be remembered every time you turn on
your Otto.

6. Download
the Servo
Calibration
App

7. Install

8. Let’s
do a
Perfect
walk

9. Proper Otto
Calibration
1. Click the open icon and
select the example file
included in the folder, make
sure your robot is connected
to the usb and then click
upload.

10. Servo Calibration
2. After successfully upload
Unplug the USB connection.
3. Unzip and Run the app file
according to your OS
contained in its relevant
folder.
Leave the file in its folder -
the program will not run if it
does not have access to the
data files.

11. Servo Calibration
4. Plug the USB again into Otto
and the red cross should turn
into a green tick when the
program has recognised that
the USB connection has been
made.
If you forgot to unplug the USB,
you will need to close the
program, unplug the USB and
start the program again.

12. Servo Calibration
5. Now calibrate the servo
positions so the the legs and
feet are correctly aligned in the
robot on your table.
The slider allows for large
changes in the angle and the +
and - buttons much finer
control on the position of each
servo.

13. Servo Calibration
6. When the servos on Otto are
correctly aligned, click on 'Walk
Test' to see how Otto moves.
If further fine adjustments are
required, they should be done
now and the walk test repeated.
Be careful that the USB cable
does not interfere with Otto's
movement and do not
disconnect.

14. Servo Calibration
7. Once you are happy with the
calibration, click 'Save'.
A tick and properly aligned Otto
will appear on the interface.
Your Otto will produce a happy
sound (if you have connected
the buzzer) and a short dance.
Now you can disconnect and
let Otto run freely calibrated.

15. CONGRATULATIONS!
You have successfully calibrated Otto's servos. The positions
have been saved to Otto and will not need to be calibrated
again unless you change the Nano or any of the servos.

16. Did you have problems?
ask in our community
🤔
join now!