LNS QUICK LOAD SERVO III MI Instruction Manual page 52

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c) R3 end of bar signal relay
When the feeding pusher reaches the End of Bar position, relay R3 energizes. This signal is used to
indicate to the lathe that there is not enough material left to make another part. The CNC must jump into a
sub-program to allow the remnant to be dejected.
The operational cycle of relay R3 (pulsed, latched, etc.) is controlled by Services parameters.
d) R4 automatic mode relay
This signal is present as soon as the bar feed system is in automatic cycle (Aut + Start).
e) Emergency stop button of the bar feed system (EM1-EM2)
When the Emergency Stop button is pressed, the contact opens. The lathe must be in Emergency Stop
mode, and the feeding pusher signal from the lathe must turn off. Two normally closed contacts of the
Emergency Stop button are available for connection in the Emergency Stop circuit of the lathe.
3.2.4. Options
The options described below are an integral part of the standard equipment of the LNS bar feed systems.
These signals, however, are not required for the proper operation of the devices, or the safety locking for
protecting persons and materials. The options are available only to optimize production conditions.
a) R5 auxiliary end of bar relay
This signal may be used to reduce the length of the remnant in case the remnants exceed the maximum
admissible length for the parts catcher of the lathe or its chip conveyor. Relay R5 energizes as soon as
the feeding pusher reaches the programmed position
b) R6 bar stock magazine empty relay
Contact of relay R6 (optional). Relay R6 engages after verification of the presence of a bar during the
loading cycle of a new bar.
3.2.5. 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 interlock 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.
QUICK LOAD SERVO III MI
CHAPTER 4: ELECTRICS