CHAPTER 8: OPERATION 8-5
ALPHA 538/552
2. POWERING ON
The motor of the ALPHA 552 bar feeder is equipped with a built-in absolute encoder that continuously
controls the position of the carrier. When the bar feeder is powered down or there is a power failure, this
position is kept in the memory by the PLC.
When powering up, the pusher position value saved is immediately taken into account, thus avoiding any
input from the beginning. The PLC reads signals from sensors and gives the operator allowable
operations only.
Notice: Do not change the pusher position when bar feeder is powered OFF. If it’s found the position
reading does not match the pusher’s actual position. For example, when pusher is at home
position, the current position is not 0. Take any approach below to reset the original position:
1. Move the pusher back to home position. Power the bar feeder OFF and ON.
2. Move the pusher back to home position. Pressing the button leftward for 3 seconds.
Power ON Power OFF
Turn the button clockwise to
power ON the barfeed system.
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