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TABLE OF CONTENTS
TECHNICAL REFERENCE
SERVICE
MANUAL
VF-SERIES
1. TOOL CHANGER
The tool changer is an all electric fixed shuttle type. Tools are always loaded through the spindle and should never be
installed directly in the carousel in order to avoid crashes. The pocket open to the spindle must always be empty in the
retracted position. All wiring to the tool changer goes through connector P6 on the side of the control cabinet.
The tool holders used are CT #40 taper, V flange, commonly called CT 40. Use A 45 Degree, P40T Type 1, inch threads
pull stud built to JMTBA standard MAS 403-1982. This pull stud is characterized by a long shaft and a 45
o
shoulder under
the head. Do not use the short shaft or pull studs with a sharp right angle (90
o
) head as they will not work and will cause
serious damage.
Tool holders and pull studs must be in good condition and tightened together with wrenches or they may stick in the spindle
taper. Clean the tool tapers with a lightly-oiled rag to leave a film to prevent rusting. Tools that make a loud bang when being
released indicate a problem and should be checked before serious damage to the shuttle occurs. When the TOOL RELEASE
button is pressed, the tool should be pushed out of the spindle by a small amount (approximately .07"). This is an indication
that the pull stud is correctly touching the release mechanism.
Low air pressure or insufficient volume will reduce the pressure applied to the tool unclamp piston and will slow down tool
change time or will not release the tool.
If the shuttle should become jammed, the control will automatically come to an alarm state. To correct this, push the
EMERGENCY STOP button and remove the cause of the jam. Push the RESET key to clear any alarms. Push the ZERO
RETURN and the AUTO ALL AXES keys to reset the Z-axis and tool changer. Never put your hands near the tool changer
when powered unless the EMERGENCY STOP button is pressed.
FU1 on the I/O PCB or the Power PCB is a fuse for the tool changer motors. It might be blown by an overload or jam of the
tool changer. Operation of the tool changer can also be interrupted by problems with the tool clamp/unclamp and the spindle
orientation mechanism. Problems with them can be caused by low air pressure or a blown solenoid circuit breaker CB4.1.2
Tool Change Sequence
When a tool change operation is performed, the following sequence of events occurs:
1) Z axis moves up to machine zero,
2) If the spindle is turning, it is commanded to stop,
3) Spindle oriented to Tool Changer,
4) Turn TSC pump off, (optional)
5) Pre-charge is on,
6) Shuttle moves in to grab tool,
7) Tool unclamps,
8) Z axis moves up,
9) Tool Changer rotates,
10) Z axis moves down,
11) Tool clamps,
12) Pre-charge off,
13) Shuttle moves out.
14) TSC on (optional)
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