WMF 800 - Page 41

Engin eering
T2-30
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
Grounds disposal
The brewing cylinder and piston are
at the lower end of the lifting area.
The friction piston presses the lower
piston through the brewing cylinder up
to its upper edge. The scraper throws
the pressed coffee grounds away with
aswinging movement. After the grounds
are discharged, the brewing cylinder
and piston move back down to the base
position for the next fill cycle.
Technical data: brewing unit
Capacity 6to 0.53oz
Start in the insertion
position
over the reed switch 5V input on CPU
Moves for all other
positions
over current evaluation to
the central power supply
analog input to the control
Brew aperture 0.6mm
Driving commands table:
From After Action
Ejection position Insertion position Full movement upwards until it
meets the switch
Insertion position Pressing position Full movement upwards until
reaching the press value given
by the software. Only start when
the reed sensor is activated
Pressing position Brewing position Brewing unit moves in respect to
the setting of the “pre-brew of
ground coffee”
Brewing position Dry pressing position Full movement upwards until the
post-press current is reached;
stop for aset post-press time
(5seconds)
Dry pressing position Ejection position Full movement downwards until
the blocking current is reached
Unknown position (e.g.
after insertion of the
brewing unit, network
off-on, ON/OFF, etc.)*
Insertion position Always moves downward, over
the ejection position into the
insertion position
*) After power off and on, after resets and after opening the brew cover, basically it
drives from the ejection position to the insertion position.