First Steps before Calibration

The machine needs to be checked prior to calibration of the seeding mechanism – this mainly concerns the connection of the seed drill to the tractor using ISO-BUS cabling, terminal functionality, tightness of the hopper lids (if the seed drill is pressurised), fan functionality etc. When the basic functions of the machine have been checked and the hopper has been filled with seeds/fertiliser, the machine is prepared for batch calibration.

The universal light seed drill OMEGA OO 4000L has intuitive control via an ISOBUS terminal

Seeding amount calibration of OMEGA OO 6000L is comfortable and fast

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The fan has to be turned on for calibration of OMEGA seed drills, with fan speed at approx. 3,500 min^-1 (to prevent depositing of the seeds/fertiliser in the conduit). Before the fan is turned on, switch the conduit flap from the distribution head to the calibration duct, then remove the calibration duct cover and insert the calibration bag. The terminal has to be activated before calibration.

Seed Drill Calibration Procedure

1. When the aforementioned tasks have been completed, start calibration of the seeding mechanism by pressing the calibration button in the rear part of the machine. If it is a seed drill with two dispensers, the calibration button is marked with number one or two. The first calibration button controls the first dispenser facing in direction of the machine and the second calibration button controls the second calibration mechanism facing in direction of the machine.
2. When the calibration button is pressed for the first time, the terminal display automatically switches to the calibration mode.
3. When the calibration button is pressed, the seeding roller fills with seeds/fertiliser. It is necessary to wait until the all the seeds/fertiliser go through the conduit to the calibration bag. Then, remove the seeds/fertiliser from the calibration bag and insert the empty bag into the holder of the calibration duct again.
4. By pressing the calibration button again, the seeds/fertiliser are poured into the calibration bag. The experience shows that it is required to pour at least 2 to 3kg to the calibration bag, which half fills the calibration bag approx.
5. To stop the dispenser roller, press the corresponding calibration button again.
6. When you weigh the full calibration bag and deduct the weight of the empty calibration bag, you will get the weight that has to be entered in the calibration display of the terminal. This concludes gross calibration.

BEDNAR interface in the ISOBUS terminal for setting the OMEGA seed drill

It is required to pour at least 2 or 3kg of seeds or fertiliser into the calibration bag

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Making Calibration More Precise

1. To make calibration more precise, reset the impulse counter and switch to the precise calibration mode. In the precise calibration mode, the seeding roller turns at speed corresponding to the travelling speed of the seed drill.
2. Pay extra attention to the selection of the seeding roller. After the travelling speed and the required batch of seeds/fertiliser per hectare are set, the indicator on the terminal signals the suitability of the selected seeding roller for the set seeding conditions. If the seeding roller is suitable for the selected batch of seeds/fertiliser, the indicator is lit in green. Otherwise, it is red, which requires changing the seeding roller.
3. If the machine is a seed drill combined with fertilisation, each dispenser has to be calibrated separately.

OMEGA OO 6000L and FERTI-BOX FB3000 have to be calibrated separately

Comfortable emptying of extra seeds from the plastic hopper back into the bag

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Practical Customer Experience

The calibration conduit is installed at the very end of the machine. The practical experience from the operation of seed drills has shown that this design is more convenient as regards access of the operator to the calibration conduit. Another advantage of this design is the possibility to empty the remaining seeds back into the bags.

Ing. Václav Křepčík, BEDNAR FMT s.r.o.
Product Department Manager