Encoder readings not correct

[dougp]

BEGINNERS: What is GROUND?

GROUND is the dirt you’re standing on. aka EARTH. Nothing you do is going to change it’s potential significantly. So we use that as a reference for other +/- voltages Usually (95% of cases) GROUND will be regarded as +/-0Vdc but to make sure, we ‘tie’ the two together with low resistance (cable) see also Why is GROUND so important ?