The controller controls two channels for packing. Each channel has two furrows for the beans
- one big and one for fine dosing. The coffee beans are transported through furrows in result of a
furrow vibration. The power of vibrations is controlled by the controller.Then the coffee falls into
special baskets, which are fixed to a load cells, class C3. The load cells is used to measure weight.
The algorithm of work is as follows:
- the valves on furrows are opened
- the controller starts the electromagnetic vibrators, so the coffee beans begin to move toward the measuring basket.
The power of vibrating is a set-up parameter in percents Full Power
- when the weight of the beans reaches assigned load for the big furrow, valve for this furrow is closed
and this vibrator is stopped
- when the weight of the beans reaches assigned full load (the desired weight of a coffee packet), the fine dosing
valve is closed too, and that vibrator is stopped
- a test is started, which purpose is to verify that the
measured weight is in the maximum permissible error range,
set in the receipt.The time for this test is a parameter
in the receipt too (according to it more or less measures
for verification are made). If the weight is lower than
desired, again the fine dosing valve is opened, and vibrator
for that furrow starts too
- If the test results are acceptable, a signal to open the bottom valve of the measuring basket is given
by controller. The coffee falls in an open packet below
- through a relay switch controller passes command for sealing and cutting the ready packet
Additional possibility is to work in multi-weighing mode, i.e, the controller doses multiple times particular
weight, and after the n-th measure gives a command for sealing and cutting. This is necessary when the capacity
of weighing basket is lower than the desired capacity of a ready packet.
The machine has two separate dosing channels, which can work independently or simultaneously, controlled by CFP-602.