SparkFun Forums

[Martin_H]

I built a scara robot arm using two analog rc servos, and I control it via gcode and inverse kinematics. I've been able to draw pictures with it which is great. But I'm not pleased with straight lines as they are a bit wibbly-wobbly. I'm fairly sure that it's because of servo dead band which limits precise coordination of the two servos.

My question is "does the open servo board merely make the servo controllable via I2C, or does it also improve the servo's accuracy?" Basically will it help make my scara arm more accurate?

I know that I should probably be using stepper motors, but they're a pain to work so compared to rc servos. I'd really like an accurate RC servo.

[jremington]

High quality digital servos have very accurate position feedback, but they are expensive. Whether the OpenServo will perform well would depend on what servo you start with and how you construct the final product, and would be a question for the OpenServo forums.