472
TECHNICAL REFERENCE
June 1999
96-8000
TOOL CHANGER POSITION SWITCHES
[Inside of Tool Carriage (2)]
GENEVA WHEEL POSITION MARK
The turret rotation mechanism has a switch mounted so that it is activated for about 30
o
of travel of the Geneva
mechanism. When activated, this switch indicates that the turret is centered on a tool position. This switch is
normally closed. The diagnostic display will show this status of this input switch as îš“TC MRKîš”. A îš“1îš” indicates
the Geneva wheel is in position.
TOOL #1 SENSE SWITCH
The tool rotation turret has a switch that is activated when tool one is in position or facing towards the spindle.
At POWER ON this switch can indicate that tool #1 is in the spindle. If this switch is not active at power-on,
the first tool change will rotate the turret until the switch engages and then move to the selected tool. The
diagnostic display will show the status of this input switch as îš“TOOL #1îš”. A îš“1îš” indicates that tool #1 is in
position.
SHUTTLE IN/OUT SWITCHES
[Tool Changer Holding Plate (2)]
Two switches are used to sense the position of the tool changer shuttle and the arm that moves it. One switch
is activated when the shuttle is moved full travel inward and one is activated when it is full travel outward. These
switches are normally closed so that both will be closed between in and out. The diagnostic display will show
this status of the input switch. A îš“1îš” indicates the associated switch is activated or open.
TRANSMISSION HIGH/LOW GEAR POSITION SWITCHES
[Bottom of Gearbox Assembly (2)]
On machines with a two-speed transmission, there are two switches in the gear box used to sense the position
of the gears. One switch indicates HIGH by opening and the other indicates LOW by opening. Between gears,
both switches are closed indicating a between-gear condition. The diagnostic display shows the status of these
switches and the CURNT COMDS display shows which gear is selected. If the switches indicate that the gear
box is between gears, the display will indicate îš“No Gearîš”.
Note: The Transmission High/Low Gear Position Switches are located at the bottom
of the Gearbox Assembly and are extremely difficult to reach. Removal of this
assembly is necessary to replace these switches. See Mechanical Service,
for Spindle Motor and Transmission removal.
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