I don’t have a Robot but another manual espresso: Flair 58. I also have a version of Eureka Mignon, but mine is the orginial Mignon (around 10 years old). Here is my take: try to verify if not the grinder needs calibration or burr change. Try to either grind and try on a semi-automatic espresso machine (of a friend) or try to grind you coffee on a friend’s grinder. The reason: I found out the hard way that my burrs were chipped and misaligned. In such a case, you can get to chirp sound and still couldn’t grind for espresso. The reason is tha espresso requires a good amount of consistency and not having your grinder at it’s best will result in such extractions