4-22 CHAPITRE 4: ELECTRICS
ALPHA ST320 S2
4.5. Options
The options described below are an integral part of the standard equipment of the LNS SA bar feed
system.
These signals, however, are not required for the proper operation of the device or the safety locking for
protecting persons and materials. The options are available only to optimize production conditions and
safety requirement.
a) Synchronization device signal (contact 127 at terminal block 23)
When this signal is ON and bar feed system is in automatic mode. The pusher movement will be
synchronized with the synchronization device. If the synchronization device is connected with the
headstock, the pusher movement will be synchronized with the moving headstock. Therefore this function
only applied to Swiss type lathe. Its function is equal to service parameter MODE 13 = 1.
The function is present when and only when this signal is ON. To apply this function, there must be a
signal sent continuously from the lathe once the lathe is in automatic mode and chuck is closed. To avoid
unexpected damage, this signal must be OFF when chuck is open.
b) Lathe door is in open position (contact 130 at terminal block 23)
When this signal is ON, the effect is equal to pressing the manual button on the remote control. When the
lathe is in open position, the bar feed system pusher will be moving slowly when the operator push
forward or backward button.
This signal is only available when the bar feed system is in manual mode. When the bar feed system is in
automatic mode. Opening the lathe door will not switch the bar feed system to manual mode.
4.6. Recapitulation of safety instructions related to the interface
•
The lathe foot switch for opening the lathe clamping device should not be operational during the
automatic cycle of the lathe.
• The lathe pedal should not be operational as long as the feeding pusher feed command signal is
present.
• Whenever possible, it is advisable to lock the manual command for opening the lathe clamping
device while the feeding pusher command signal is ON.
• If the lathe is in the emergency stop mode, the bar feed system must also be under the emergency
stop mode, and vice-versa.
• If the bar feed system generates an alarm, the lathe must go into alarm mode. The feeding pusher
feed command signal must go off, the spindle axis and rotation must stop.
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