HOWA MACHINERY H032M, Instruction Manual, Page: 42 / 52

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3.6.1 Before Gripping Work piece
NOTE
ANSI B11.6-1984 prescribes installation of an interlock circuit for preventing chuck
rotation or an audible or visible warning system activated when the required pressure is
not supplied to the cylinder gripping side.
Perform a test run at low speed before cutting to verify that the top jaws or the stopper does not
interfere with the turret or tools.
3.6.2 When Gripping Work piece
NOTE:
ANSI B11.6-1984 prescribes installation of a shielding cover (guard) so that no part of the
operator's body can be caught between a part of the chuck and the surface of the work
piece when the space in between exceeds 1/4 inch with the jaws fully opened.
Before beginning operations, check to be sure that the pneumatic
or hydraulic pressure needed to operate the chuck is being
supplied to the rotating cylinder. If not supplied or not sufficient,
the work piece could slip out and fly off as the cutting starts, and
may cause severe injury or death to the operator and/or
bystanders.
To make sure that there will be no interference of the top jaws or
stopper with the turret or tools, do a test run cycle at low spindle
speed without work gripping.
Should there in fact be interference, the resulting sharp collision
may cause the top jaws or the stopper to fly off, which may lead to
severe injury or death to the operator and/or bystanders.
To comply with ANSl B11.6-1984 section 4.3.2, you need to install a
check valve and an accumulator in the connecting area with the
chuck so that the hydraulic or pneumatic system does not loose
pressure in case of failure.
Besides check valve and accumulator, it is essential to install a
shielding cover that separates the chuck and work piece from the
operator or bystanders. Without such a cover, the work piece,
chips or tool fragments will fly out, causing severe injury or death
to the operator and/or bystanders.
When gripping the work piece with the chuck, be careful not to get
any part of your body caught between the top jaws and the work
piece or between the work piece and the machine. The operator's
hand may be injured.
WARNING
WARNING
WARNING
CAUTION