CHAPTER 8: OPERATION 8-7
ALPHA ST320 S2
3. POWERING
The motor of the ALPHA ST320 S2 bar feed system is equipped with a built-in absolute encoder that
continuously controls the position of the carrier. When the bar feed system 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 feed system 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 feed system OFF and ON.
2. Move the pusher back to home position. Pressing the button toward home position for 3 seconds.
Turn the button clockwise to
power ON the bar feed system.