Suction Frame Not Stand By (Alarm 159) / Watchdog Suction Frame Activated (Alarm 155)

Context

The suction frame assembly depends on the required speed (case per minute), this includes the choice of used sensors as well the location of the sensors. The movement of the suction frame is initiated with an air cylinder or a motor. Two reed switches (or a home sensor and an encoder) check the end positions (home and forward). A watchdog is timing the movement of the suction frame for both versions.

For a motor driven suction frame, one complete rotation is equal to 72 pulses. Depending on the capacity, the suction frame is speeding up and slowing down at a certain position. The suction frame can run with 8 different speeds. Depending on the capacity we select the required speed to maintain the correct capacity.

One rotation contains 4 different speeds:

Fast towards magazine
Slow at magazine
Fast to home position
Slow at home position

Help Text:

Remove case
Check home position sensor
Check compressed air supply

Problem

The sensors: The sensors might not be functioning properly to detect the end positions. A watchdog timing the movement of the suction frame will timeout if not sensed properly and cause the alarms.
Air supply: A reed contact on the air cylinder checks the movement backwards and forwards. When the valve for the suction frame is de-activated, a timer is started. The timer stops when the reed contact ’suction frame home’ has an input. When the timer runs out (approximately 6 seconds or 10 cases worth of time), a watchdog-error is generated. Air pressure can slow down the movement. When failure occurs frequently, check air supply.
- Filled with water: empty the water from the filter. When inside a humid environment air quality can be low.
- Filled with lubricant
- Valve is broken or stuck in a position: will not respond to the electrical operating signal.

Solution

Replace a faulty sensor and/or fasten into proper position.

Clear the air supply.

Problem

Solution

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