ATS ULTIMATE CHUCK UC2, Installation, Operation And Maintenance Manual

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ATS Systems Ultimate Chuck Installation and Operations Manual
The recommended maximum speed given is only
valid for maximum draw bar pull using the standard
stepped hard jaws model GUA or GST designed for
the chuck, and only for a chuck that has been
properly maintained and lubricated.
WARNING
During machining, testing, and set up or whenever the
chuck is rotating, the chuck and the clamped
workpiece must at all times be protected by an
adequate guard.
Excessive top jaw weight must be avoided ! Pay
careful attention when designing or using soft jaws or
special jaws. Jaw weight, their distance from
centerline and the RPM of the lathe dramatically
effect remaining chuck grip force during chuck
rotation. In extreme cases of unsafe use it may even
be possible for the top jaws themselves to fly off the
chuck. See this manual section 1.3.6 and 4.6 for
more information.
WARNING
Avoid standing directly in line with a rotating
chuck or workpiece!
It is good safety practice to
assume the lathe’s guard may not prevent a thrown
workpiece or broken top jaw fragment from
penetrating the guard.
1.3.2 Safety when installing the Chuck
When installing a chuck and/or a cylinder to a
lathe, the following technical safety requirements
must be observed:
•
The lathe should be equipped with safety
systems that prevent the spindle from rotating
unless the clamping pressure has built up in the
cylinder and clamping of the chuck has been
confirmed by a feedback system.
• The lathe should be equipped with safety
systems so that unclamping is only possible
when the machine spindle has come to a
complete stop.
• The lathe and clamping cylinder should be
equipped with safety systems so that in the case
of a failure in the supply of pressure to the
cylinder, the workpiece remains securely
clamped until the spindle has come to a complete
stop.
• The lathe should be equipped with safety
systems so that in the case of a power failure and
re-supply, the lathe will not restart without new
commands from the lathe operator.
• Stroke control! The lathe should be equipped
with a safety system that monitors the stroke of
the actuating cylinder piston and prevents the
lathe spindle from rotating unless a workpiece is
properly clamped. One recommended system
provides a safety zone at the front and rear most
portion of the piston stroke. For the lathe
spindle to rotate, the piston must be somewhere
between the front and rear safety zones which is
only possible if a workpiece is clamped.
Caution: Whenever the chuck is removed for
maintenance or any other reason, then
reinstalled, the stroke control switch adjustments
must be checked and readjusted if necessary.
1.3.3 Inspecting chuck function and performance
After installing the power chuck, its function and
performance must be checked.
•
Clamping Force! The clamping force of the chuck
and cylinder system must be checked with a grip
force gauge. Refer to the chuck and cylinder
specifications, note the hydraulic or pneumatic
operating pressure, calculate the expected grip
force and confirm the actual performance with
the grip force gauge. If it does not match within
10%, do not use the system until the cause is
determined and corrected.
Important: When
using other then standard factory hard jaws, the
grip force should be checked with a dynamic grip
force gauge at the planned operating speed
(RPM) to insure there is adequate grip force
remaining to hold the workpiece. Start the
inspection at a low speed and build up to the
operating speed while observing the gauge.
(Note: Estimated grip force loss at speed can be