In regulation mode the magnitude of the output signal has a direct affect on the maximum amplitude
of the feeder.
On bowl feeders it is advisable to fit the sensor as near as possible to
the outside diameter and in this position it will be subjected to the
greatest movement.
The control range of the set-point will be considerably reduced when
the sensor signal is weak.
s = deflection
Mounting position 1 = small movement
Mounting position 2 = large movement
Bowl feeder example
Linear Feeder Example
1 = small amplitude because sensor is mounted vertically
2 = larger amplitude because sensor is mounted in the same plane as the springs
13.0 Trouble shooting – Analogue controllers
Unit doesn’t work:
•
Check supply voltage; check fuse and replace if necessary.
•
Check short-circuit protection fuse in the controller and replace if necessary.
•
Control input (Inhibit/Enable) correctly set?
Feed equipment has no power:
•
Check that the correct vibrating frequency has been selected and change if necessary.
•
Check supply frequency (50/60 Hz). Vibrating frequency and supply frequency must correspond.
•
Setting of trimmer “Umax” is too low; adjust “Umax”.
Feed equipment vibrates aggressively, coil hammers:
•
Incorrect vibrating frequency setting. BEWARE: coil can be destroyed by overheating or damaged
mechanically by hammering.
•
Setting of trimmer “Umax” is too high; adjust “Umax”.
Coil gets hot:
•
Check that coil has incorrect supply rating.
•
Incorrect vibrating frequency has been selected; adjust if necessary.
•
Air-gap too big.
Track control doesn’t operate:
•
Sensor incorrectly wired; check connections.
•
Check if time-out setting is too short (shorter than “t
on
”).
•
Defective controller fuses (if fitted); check and replace if necessary.
19
1
2
2
1
s
Sensor
Direction of
vibration
Mounting block
Moving part
Fixed part
1
2
