Hi, I finally solved the issue. I just upgrade the encoders to the new model of CUI, ref AMT10E2-V. This new encoder supports 3.3V, so no more problem...

Hi again, I have been testing some level shifter, but no luck. The error keeps going. Now I supply 5V to the encoders and 3.3V to the limit switches. ...

Thank you, I will try to supply 5V to the encoders and use a level shifter.

Thank you for your answer, Yes, they are working on 3.3V. No, the encoders are also working on 3.3V. Checking the datasheet, I see that th...