Dosing by weight: product rate too low or too high

What to do when the Hectare Mini reports that a product dosed by weight is applied below or above its target rate, or cannot be dosed at all.

These are alarms of the system as a whole: the window has no device line. They come only when a product is followed by weight — by a dispenser shaft sensor with “Weight control” at “Yes”, or by dispenser motors. The number in the text is the number of the product, “Product 1” to “Product 3”.

“Rate of Product 1 is to low!” / “Rate of Product 1 is to high!”

What it means. The weight of the product applied per hectare deviates from its target rate by more than “Product rate error,%” of the “Settings” menu (The Settings menu).

What to check, in this order:

1. The target rate of the product — Change the target rate.
2. The metering unit: roller, variator or gearbox setting, product flow from the hopper.
3. The settings of the dispenser shaft sensor that applies this product, and its “Type of product” — Dispenser shaft sensor.
4. The dispenser shaft sensor is serviceable.
5. Calibrate by weight again — Calibrate the dispenser by weight, or for motors Calibrate a motor by weight. A new roller, another setting of the drive or another seed always need a new calibration.

“Product dosage is impossible! Check product rate and calibration!”

What it means. On a machine with dispenser motors: with the present target rates and calibrations no travel speed exists at which the motors could apply all products. The panel shows it again each time the seeding starts.

What to check, in this order:

1. The target rates of the products.
2. The calibration of the motors and their shaft speed limits — Calibrate a motor by weight.

Something your machine does that this page does not answer? Write to support@agriwelt.com — an engineer answers.