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?
I've just started upgrading my AR2 to an aluminium AR4. I had this same question re screen grounding. I've decided to provide a connecting wire to the screen section of the encoder wire bundle & decide later whether to ground or not. A section of screen which is ungrounded could act as an aerial? A screen grounded at both ends is not generally a good idea?
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.