Fan or dispenser shaft: speed alarms

What to do when the fan or a dispenser shaft of the Hectare Mini turns too slowly, too fast, or not at all.

The fan sensor and the dispenser shaft sensor use the same two messages. The device line of the alarm window tells you which one — Fan or Dispenser, with its number. How the window works: How alarms work.

“Low speed of rotation”

What it means. The fan turns slower than “Minimum, rpm”, or the dispenser shaft slower than the travel speed demands, by more than “Maximum error, %”.

What to check, in this order:

1. Dispenser only: the speed on the panel matches the real speed.
2. The component being watched — the fan and its drive, or the dispenser and its drive.
3. The settings of the sensor: for the fan “Minimum, rpm” and “Pulses” — Fan sensor; for the dispenser “Maximum error, %” — Dispenser shaft sensor.
4. The sensor itself is serviceable.
5. Dispenser only: calibrate the rotation again — Calibrate the dispenser rotation.

“High speed of rotation”

What it means. The fan turns faster than “Maximum, rpm” — this is watched also when the machine stands — or the dispenser shaft faster than the travel speed demands, by more than “Maximum error, %”.

What to check, in this order:

1. Dispenser only: the speed on the panel matches the real speed.
2. The component being watched — the fan and its drive, or the dispenser and its drive.
3. The settings of the sensor: for the fan “Maximum, rpm” and “Pulses”; for the dispenser “Maximum error, %”.
4. The sensor itself is serviceable.
5. Dispenser only: calibrate the rotation again.

The dispenser shaft speed is watched only with “Rotation speed control” at “Yes”, and only while the machine moves.

“No rotation”

What it means. The dispenser shaft gives no pulse for longer than “Period, s” while the machine sows or moves. Only the dispenser shaft sensor raises this alarm.

What to check, in this order:

1. The dispenser and its drive — chain, clutch, shear pin.
2. “Period, s” of the sensor: long enough for the slowest shaft speed at work — Dispenser shaft sensor.
3. The gap between the sensor and its target, and the sensor itself.

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