PRO
dbeard
USA
Asked
I am running two EZB's on my project. The second one has two servos connected. When I run the script command getservo(1.12) or getservo(1.13) it returns zero until I actually issue a move servo command and then it will show the position of the servo. Has anyone else noticed this issue?
Related Hardware (view all EZB hardware)
EZ-B V4
by EZ-Robot
EZ-B v4/2 robot controller: dual Cortex ARM, Wi-Fi, audio/video, 24 servo/digital ports, I2C/UART, camera and Synthiam ARC control for custom robots
Wi-Fi / USB
Servos
24
Camera
Audio
UART
3
I2C
ADC
8
Digital
24
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I have browsed through many conversations and not found anyone reporting this issue.
I may be misinterpreting your question but this seems reasonable to me. If you haven't issued a servo command for it to move a servo to a certain position then ARC doesn't know where the servo is. The EZ-Robot servos do not tell ARC what their position is, they do not have inverse kinematics features, you need Dynamixel servos or other specialty servos for that.
Do you have an initialization script that puts all servos into a starting position? This allows ARC to get the servo position.
I have an init script but it doesn't move the servos. Will add that. Not sure why I thought it would know. Thanks for the information.
Here’s a good manual page on how a servo works. Once you get the gist, it’ll make sense why that is the way it is. The servo is not in a position until it’s instructed to be in one: https://synthiam.com/Software/Manual/Introduction-to-servo-motors-17393 ps, it seems the AI Bot had also answered with this same answer