LNS Alpha ST320 S2 - Page 92

8-14 CHAPTER 8: OPERATION
ALPHA ST320 S2
P05: Top Cut setup
This parameter should be modified
if the barfeeder is re-installed or
moved.
Current position : (read only)
The current pusher position measured from pusher origin
sensor SQ2.
Reference : (read only)
The current bar tip position measured from bar length
measuring device SQ1.
Top cut :
• Definition :
The position where the lathe applied bar tip machining on
new loaded bar stock for getting a better reference
surface. The term TOP CUT presents both the machining
itself and the position to proceed it.
• Setup :
− Load a new bar stock by Open channel button.
− Close the channel
− Move the bar stock into the spindle until the bar tip
arrives at the desired position for the operator.
− Read value of “Reference” shown and enter TOP
CUT.
• This position is specifically measured from sensor SQ1
and for controlling the distance that the bar tip travels from
bar feed system. With this configuration, this value is
independent from bar length. Once it’s setup, this value
will not need to be changed unless the bar feeder is
moved.
• During automatic cycle, the sensor SQ2 is activated with
the bar loading action simultaneously. When the new bar
stock hits the device, the PLC start to counter the
distance. When this distance is reached, the bar feed
system stops the pusher and sends a START signal to the
lathe.
P06: Front rest setup
This page includes parameters for driving front rest devices
and hydraulic pump during AUTOMATIC mode.
• The front rest is a device for clamping the rotating bar
stock during machining in order to minimize the vibration.
It must open before the pusher passes through it to
prevent its rollers to be damaged by pushers rotating
components.
• The hydraulic pump is recommended to turn OFF when
the bar stock is completely fed out of the guiding channel.
Current position : (read only)
The current pusher position measured from home position
SQ2.
1st :
The pusher position where the first front rest opens.
2nd :
The pusher position where the hydraulic pump turns OFF.
Option :
The pusher position where the second front rest (optional)
opens.