96-8100 1-15-96
170
TECHNICAL REFERENCE
SERVICE
MANUAL
VF-SERIES
14.2 M-FIN DISCRETE INPUT
The M-FIN discrete input is a low voltage circuit. When the circuit is open, there is +12V DC at this signal. When this line
is brought to ground, there will be about 10 milliamps of current. M-FIN is discrete input #10 and is wired from input #10
on the Inputs PCB on the Input/Output Assembly. The return line for grounding the circuit should also be picked up from that
PCB. For reliability, these two wires should be routed in a shielded cable where the shield is grounded at one end only. The
diagnostic display will show this signal a 1 when the circuit is open and a 0 when this circuit is grounded.
14.3 TURNING M FUNCTIONS ON AND OFF
The eight optional M code relays can also be separately turned on and off using M codes M51-M54 and M61- M64. M51
to M54 will turn on one of the eight relays and M61 to M64 will turn the relays off. M51 and M61correspond to M21, etc.
15. LUBRICATION PUMP
The lubrication pump is powered whenever the spindle is on or any axes are in motion. It operates from 115V AC On a cyclic
basis, it will pump oil to the screws and guides. It cycles at least once every 30 minutes and pumps 2.8cc- 3.8cc of
lubrication.
15.1 LOW LUBRICATION AND LOW PRESSURE SENSE SWITCHES
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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