TECHNICAL REFERENCE
469
June 1999
96-8000
12.16 LUBRICATION S YSTEM
The lubrication system is a resistance type system which forces oil through metering units at each of the 16
lubricating points within the machine. The system uses one metering unit at each of the lubricating points: one
for each linear guide pad, one for each lead screw and one for spindle lubrication. A single oil pump is used to
lubricate the system. The pump is powered only when the spindle and/or an axis moves. Once powered the
pump cycles approximately 3.0 cc of oil every 30 minutes throughout the oil lines to the lube points. Every lube
point receives approximately 1/16 of oil. The control monitors this system through an internal level switch in the
reservoir and external pressure switch on the lube panel.
LOW L UBRICATION AND L OW P RESSURE S ENSE S WITCHES
There is a low lube sense switch in the oil tank. When the oil is low, an alarm will be generated. This alarm will
not occur until the end of a program is reached. There is also an lube pressure switch that senses the lube
pressure. Parameter 117 controls the lube pressure check. If Parameter 117 is not zero, the lube pressure is
checked for cycling high within that period. Parameter 117 has units of , 1/50 seconds; so 30 minutes gives a
value of 90000. Parameter 57, bit "Oiler on/off", indicates the lube pump is only powered when the spindle fan
is powered. The lube pressure is only checked when the pump is on.
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