Hi all,
Since my goal is to put the robot arm to the industrial environment, I am thinking about maintaining the accuracy of my AR4 robot arm when doing the long period of time, especially the encoder part since it will generate feedback so that the robot will remember the position without keep re calibrating itself
I have seen Chris Annin use the shielding cable for the encoder wire connection, but from what I have researched, the shielding cable will have no effect of preventing interference if it is not grounded itself. If anyone also notice this and what is you guys solution to solve this problem?
The encoder in AR4 has differential outputs or complementary signals for noise immunity. When noise is present on a differential pair, the differential receiver cancels the noise aka common mode rejection. Not sure why AR4 only used single ended A and B signals. In that case a shielded cable can help if noise is a concern. A shield if not grounded has no value.