Niche Zero. Stuck on coarse grind setting?

nosiesta

Today something weird has happened with my Niche Zero.

I adjusted the grind size to 35 to grind for an Aeropress. I then adjusted the setting back to 7 for an espresso. I adjusted it by turning the dial a short way, running the grinder, turning, running etc until I got to 7.

I tamped and prep’d as usual but the water flowed through the puck at a ridiculous rate. 60g in maybe 15 seconds. Like it was super coarse or there was a huge channel

I wondered if I had screwed up my prep, so I tried again and the same thing happened.

It seems to me that the coarse setting that I changed the grinder to has not ‘reset’ to the finer setting for some reason.

It’s not the beans or the machine. Nothing has changed there and I’ve pulled many many shots at 7 on the Niche with these beans and had no issues at all (usually 18 in, 40 out in 35” ish).

Has anyone experienced this problem? Can anyone please offer any advice?

Many thanks

MediumRoastSteam

nosiesta - rule out you haven’t moved the calibration dial by mistake.

Make sure you turn the grinder back to “zero” and the go back to your set point. Make sure that when it’s back to zero, you can’t go any further, so zero is where it should be. If you can go further, then it moved.

If not the above, apart from having some coarse grinds left over in the chamber or chute and those ended up in your basket, I can’t see what else could be wrong.

Cuprajake

Clean and check calibration. Poss you moved the black ring.

Has to be done on a completely clean grinder.

nosiesta

It’s not the calibration ring. However I will clean and check as it can’t hurt. I wonder if there’s an issue internally - ie somethings broken!

MediumRoastSteam

nosiesta - check whether the screw which holds/locks the burrs is tight.

nosiesta

For closure.

I stripped the grinder down today, cleaned it and calibrated it as per Dave’s video. It hardly had any coffee in there to clean, but can’t hurt. The problem seems to have gone away, so I can only imagine that the bolt had loosened a bit perhaps.

Thanks for the help.