CFP-602

CFP-602

CFP-602 is a stand-alone unit for measurement and control, used in industrial applications for dosing materials and automation.

It is built according to a request from “ELIA – 2” Ltd., a firm manufacturing packed coffee beans. This controller controls two channels for packing simultaneously, achieving 10 packs/minute for each channel (1kg pack).

Normal mode of operation

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 as a 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 cell, class C3. The load cell 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, whose 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 the controller. The coffee falls in an open packet below
– through a relay switch controller passes command for sealing and cutting the ready packet

An additional possibility is to work in multi-weighing mode, i.e., the controller doses multiple times a particular weight, and after the n-th measure gives a command for sealing and cutting. This is necessary when the capacity of the 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.

Additional information

The standard capabilities of CFP-602 are:

work with two electronic scales simultaneously
control of 6 pneumatic electromagnetic valves, 24V
control of 4 electromagnetic vibrators, used to provide transportation of the product from storage bunker to a weighing basket
2 output relay switch signals, which gives signals for sealing and cutting a packet (end of the process), and 1 input – for starting a dosing and packing cycle

A speed of 10 packets/minute is achieved for a 1kg packet, with an error of +-10 g. The two channels can work simultaneously, delayed from each other by 50% of the cycle. In that mode a speed of 20 packets is achieved. It is possible to achieve more precise measuring, but the speed of packing will decrease. Also, the precision of measuring is usually a projection of mechanical design in that kind of complete automation system. The client interface consists of an LCD display of 4×20 (four rows with 20 characters each) and a keyboard of four buttons for setupand work. An emergency STOP button is provided, which stops immediately every activity

The following parameters can be set up by the user:

weight, when the big furrow is stopped
weight total
time to verify the measured weight
number of weighings (in multi-weigh mode)
delay of signal for sealing the packet, after the coffee falls in it (ms)
power of vibrating (separate for each furrow) – in percents full power of electromagnetic vibrators
number of cycles dosing/sealing, followed by automatic command “ZERO” to the embedded electronic scale

16 different receipts/presets can be memorised (combinations of parameters). The unit is designed and build entirely by “GINEERS” Ltd. Everything is made on a sub-unit principle. That gives us flexibility in similar projects ordered, which is in fact our main purpose. In this case the electronics have been put in a dust- and waterproof box, made by Himel (IP 65), suitable for industrial purposes.

An additional option is a connection to a personal computer via the RS-232C standard and the design of suitable software, according to the needs of a particular client.

Normal mode of operation

Additional information

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