Is this a typo?Originally Posted by Myrtle link=1161559534/0#0 date=1161559534
If the true zero point is +3 *(on the dial) there is no way that you could move it to -7. This is 10 steps below where the burrs are touching and should be a physical impossibility, unless the blades are made of flexible material of course *;).
If you tried operating the machine below the true zero point, the burrs would never turn as they would be locked together.
It sounds like you mightnt have found the true zero point. I wouldnt worry too much about what the dial is telling you though, theyre never accurate.
If the espresso is extracting roughly around the 25-35 second mark, you only have to make minor tweaks to the grind setting, ie 1 or 2 notches to bring it to the correct timing.
If youre extracting roughly within this time, the taste and colouring of the pull is how you should be judging it.
The other consideration is the beans. How fresh are they? Beans that are stale will taste like crap and it will be hard to examine the tastes properly. On the other hand, beans that are too fresh after a roast will give you big gaseous pours, and tend to extract too quickly.
Hope this helps.