Gastroback Design Espresso Advanced Pro GS Operating Instructions Manual page 62

Place the portafilter into the grinding cradle
Press the FILTER SIZE button according to the filter size (single shot or double shot) you
select.
STEP 4 – ADJUSTING THE GRIND SIZE
The resulting espresso will be over extracted, too dark and bitter, with a mottled and
uneven crema on top.
If the grind is too coarse the water will flow through the ground espresso too quickly.
This will result in an under-extracted espresso lacking in flavor and without the thick cre-
ma on the top.
STEP 5 – ADJUSTING THE GRIND AMOUNT
Note:
You may need to try step 4 and 5 a few times, slightly adjusting the GRIND SIZE and
GRIND AMOUNT dials each time until you reach your desired combination.
STEP 6 – GRINDING THE BEANS
fresh ground espresso.
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When setting the grind size it should be fine, but not too
fine or powdery. The grind will effect the rate at which the
water flows through the ground espresso in the filter and
therefore the taste of the espresso.
If the grind is too fine (looks like powder and feels like
flour when rubbed between fingers), the water will not flow
through the ground espresso even when under pressure.
When grinding for a Single Wall Filter using a finer espresso grind,
you will need to increase the grind amount to ensure the filter is cor-
rectly filled.
To increase the grind amount, turn the GRIND AMOUNT dial
beyond the LESS setting to obtain the correct amount of ground
espresso.
Fill the hopper with fresh coffee beans.
Ensure the portafilter is inserted into the grinding cradle.
Ensure the FILTER SIZE button reflects the filter size inserted in the
portafilter.
For Auto Start and Stop Grinding - push the portafilter in once to acti-
vate the grinding switch, then allow the portafilter to be filled with