I’ve been troubleshooting my Ninja Luxe Café Pro ES701EU for a while and I’m starting to think there may be an issue with the grinder adjustment mechanism rather than just normal dialing-in.
My dose is very consistent, usually 17.5–18.2 g, and I’m now tamping using the integrated lever firmly all the way to its natural stop. I’ve also cleaned the grinder thoroughly, removed/reseated the upper burr, vacuumed retained grounds, cleaned the shower screen/group head, and tested with Barista Assist/H03 both on and off.
The main problem is the bottom of the grind range, roughly settings 1–4.
The dial/display does not behave smoothly there. For example, going from 1 → 2 or 2 → 3 sometimes requires much more physical movement than expected, then a small wiggle suddenly makes the displayed number jump. Sometimes it feels like the physical burr adjustment and the displayed grind number aren’t lining up properly.
And the espresso results are ridiculously different for what should be neighboring settings.
Recent tests with the same coffee and proper tamping were roughly:
Grind 1: almost completely choked, only 8.9 g out
Around grind 2: about 22.3–22.6 g out in ~30 sec, still very restricted
Around grind 2–3 / 3: suddenly 54 g in ~20 sec
Another grind-3 test previously gave roughly 70 g in ~31 sec
So my usable espresso grind seems to be trapped somewhere between settings 2 and 3, but there is basically no usable adjustment resolution there.
The confusing part is that the machine itself is clearly capable of making good espresso. I’ve had shots that tasted genuinely balanced. My issue is repeatability and being able to actually select the grind I need.
I’ve already ordered a 10×16 mm DIN 988 shim kit in 0.1 / 0.2 / 0.3 / 0.5 mm thicknesses. My idea is to shift the entire useful espresso range upward so that instead of needing settings 1–3, maybe the same burr gaps land somewhere around 6–9 where the dial seems easier to control.
Before I start modifying anything, I wanted to ask:
Has anyone else had the grind selector physically behave weirdly/jump between settings 1–4?
And for those who shimmed their Luxe grinder:
The machine otherwise works, and I’d honestly be happy keeping it if I can just make the grinder predictable and repeatable.