Detection Of Metal; Stopping The Feed Intake Section - Kongskilde FCT 1260 Operator's Manual

The reliability with which the detector registers the metal is approximately 95%.
However, several factors influence the reliability of the sensor:
 Size of the metal object;
 Shape of the metal object;
 Position of the metal in the feed intake section;
 Cutting length and thus the feed intake speed;
 Distance between the pawl and the ratchet wheel in the stop system.

DETECTION OF METAL

When a magnetic piece of metal passes the magnetic tub, a voltage is induced which
is immediately detected by the microprocessor in the control unit, which then triggers
a programmed stop sequence.

STOPPING THE FEED INTAKE SECTION

Fig. 5-3 When the metal has been detected, a signal will be sent which causes the voltage on
the magnetic coil C to be disconnected. This then activates pawl A, which then
engages with the ratchet wheel B, which blocks the feed intake and triggers the
connection D. The reverse function simultaneously goes to neutral position.
As the feed intake is blocked faster than the reverse function switches to neutral, the
clutch D is released briefly. This slips until the reverse has disengaged the belt
transmission.
The reverse slackens the V-belts, and the drive of the feed intake is deactivated.
This means that the feed intake automatically switches to neutral when metal is
detected, even though the switch on the control box is in the feed intake position.
Naturally, the system can only operate if there is constant oil flow to the machine and
the control unit is switched on.
This neutral position is necessary for any disengagement, as the clutch would
otherwise be damaged and would need to be replaced.
WARNING:
PIGB-206B-02 FCT 1260-1460 0218
5. METAL DETECTOR (MD)
Fig. 5-3
Do not approach the machine when the feed intake is in neutral
position and the rotor is rotating. Neutral position does not
guarantee that the feed intake will not start.
C A
B
- 71 -
D