Section 6: The Coffee System 3033-006B
6-10 Concordia Xpress Technical Support Manual
2900-300B
Brew Group Initialization
Each time the Concordia Xpress is turned on, the brew group runs
through 22 different steps to perform a self-calibration. The CPU
monitors the coffee piston movement from the base of the brew chamber
to the base of the brew piston.
As the CPU monitors the piston movement based on the rotational Hall-
Effect sensors and locates the fixed Hall-Effect sensors, the CPU’s
piston positions are reset.
Upon completion of the group initialization, the pistons move to their
home position.
During operation, the pistons move past the fixed sensors and the CPU’s
piston positions are reset.
Brew Group Components
Right Motor
Operating Voltage: approximately 38Vdc (unloaded)
The right motor drives the right piston up and down. A set of rotational
Hall-Effect sensors located within the motor send electronic pulses to the
CPU. The CPU correlates “X” pulses of motor rotation to piston
movement.
Left Motor
Operating Voltage: approximately 38Vdc (unloaded)
The left motor drives the left piston up and down in the brew chamber. A
set of rotational Hall-Effect sensors located within the motor send
electronic pulses to the CPU. The CPU correlates “X” pulses of motor
rotation to piston movement.
NOTE: The left and right motors are not interchangeable because they
contain different worm drive gears.
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