I have a problem with the calibration, when calibrating the front motors are always on the right, it is as if that were the zero angle, the same thing happens with the camera but it is on the left side and the motors also get stiff, I have tried the calibration but it does not work, when I try to move it to the right or left it does not work
We suggest providing a video of the issue for us to better assist you in analyzing and solving the problem.
From your description, it seems that the initial zeroing of your servo may not have been done correctly before assembling and securing the servo. You need to remove the servo, redo the zeroing adjustment, and then reassemble and secure the servo.
You can refer to our assembly video for guidance:
https://youtu.be/i5FpY3FAcyA?t=512
Before installing each servo, you need to zero it first. The zeroing steps are as follows: first, install the Raspberry Pi operating system, then install the required modules, and run the script (which sets the angles of all PWM pins to 0). After that, connect the servo wire to zero the servo.
Finally, once the picar-x is fully assembled, proceed to calibrate the picar-x.