1-15-96 96-8100
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TABLE OF CONTENTS
HAAS AUTOMATION, INC.
TROUBLESHOOTING
SERVICE
MANUAL
VF-SERIES
4.5 SPINDLE ORIENTATION
A switch is used to sense when the pin drops in to lock the spindle. When the pin drops the switch opens, indicating
orientation is complete. The normally-closed side of this switch is wired to the spindle drive and commands it into the
COAST STOP condition. This is done to make sure that the spindle motor is not powered when the pin is locking the
spindle. If, during a tool change, the dogs on the spindle shaft do not align with the keys on the ATC carousel, the
spindle orientation may be at fault.
The orientation of the spindle is as follows:
1) If the spindle is turning, it is commanded to stop,
2) Pause until spindle is stopped,
3) Spindle orientation speed is commanded forward,
4) Pause until spindle is at orientation speed,
5) Command spindle lock air solenoid active,
6) Pause until spindle locked status is active and stable,
7) If not locked after time-out time, alarm and stop.
´ ATC out of orientation with the spindle. Incorrect spindle orientation will cause the ATC to
crash as the shuttle moves. Alarm 113 will be generated.
l Check the orientation of the machine.
´ ATC WILL NOT RUN
l In all cases where the tool changer will not run, an alarm is generated to indicate either a shuttle in/out problem or a
turret rotation problem. These alarms will occur either on an attempt to change tools (ATC FWD) or ZERO RETURN the
machine (AUTO ALL AXES). Use the appropriate alarm to select one of the problems following:
´ ATC shuttle will not move; shuttle is getting power (Command a tool change and feel for power
being applied to the shuttle motor).
l Disconnect the slip clutch arm from the ATC shuttle and ensure the shuttle can move freely. If not, appropriate section
for shuttle adjustment.
l Command a tool change with the shuttle disconnected.
Ø If the shuttle cycles, check the slip clutch on the ATC. See "Shuttle Installation" section for slip clutch
replacement.
NOTE: The slip clutch should move the shuttle with a fair amount of force, but not so much that the shuttle cannot be
made to slip when holding it back by hand. If the slip clutch is frozen, replace it. It cannot be rebuilt in the field.
Ø If the shuttle does not cycle, the motor has failed and must be replaced. Turn the motor by hand and feel
for binding in the gear train in the motor.
NOTE: The motor uses a large amount of gear reduction and should be hard to turn by hand.
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