EVOCA Opera Touch - Brew Unit

02-2023 6095 00 25
OPERATION
The following paragraphs describe the
operation of the main components of the
machine.
BREW UNIT
Whenever you power on the machine or
make a request for dispensing, the brew
unit will make a complete rotation before
performing the brew cycle to make sure that
the device will occupy the initial position.
DispENsiNg cyclE
Whenever you require a coee-based
selection, the grinder will operate to ll the
coee doser chamber.
When the doser is full, the ground dose is
released into the brewing chamber verti-
cally arranged inside the coee unit.
The ratio-motor engaged onto the pinion
(6) will rotate the cranks (5) that will cause
the brewing chamber to rotate by 30°.
The upper piston (1) will align with the
brewing chamber and move down inside
it. The stop position of the piston for brew-
ing will depend upon the quantity of ground
product in the chamber.
At the end of the coee dispensing cycle,
the upper piston will move down to me-
chanically compress the used coee dose,
thus helping water in excess to come out
of the third way of the dispensing solenoid
valve.
2
3
4
5
1
6
7
Fig. 21
1. Upper piston
2. Coffee outlet nozzle
3. Scraper
4. Connecting rods
5. Cranks
6. Pinion
7. Waste coffee chute
At the end of the cycle, the ratio-motor is
driven in the opposite direction, thus lifting
the upper piston and rotating the brewing
chamber to the unload side, opposite the
dispensing side; the lower piston (8) will
move up.
After having reached the unload position,
the ratio-motor will reverse the direction of
rotation once again, thus moving the brew-
ing chamber back into its standby position.
The scraper (3) will retain and drop the cof-
fee dose whereas the lower piston (8) will
move back into its standby position.