Safety
Glossary
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L
J
JOB SAFETY ANALYSIS
: A formal hazard identification process
that documents the hazards associated with a specific task, and
provides a formal written safe work procedure. (B-11
Definitions Manual)
JOG: An intermittent motion imparted to the slide
by momentary operation of the drive motion, after the clutch is
engaged with the flywheel at rest.
JOG BAR: A bar or rod running through the length of the
[machine] that is used for jogging. (B-11 Definitions
Manual)
JOG MODE: An operating mode of a full revolution clutch
press wherein an intermittent motion is imparted to the slide
by momentary operation of the drive motor after the clutch is
engaged with the flywheel at rest. (B-11 Definitions
Manual)
JOINT: Rotary or translational (sliding) couplings
between adjacent links in an articulated kinematic chain.
(R15.07)
JOINT ACCELERATION: The time rate of change of
joint velocity. (R15.07)
JOINT COORDINATE SYSTEM
: A coordinate system referenced to
the joint axes, the joint coordinates of which are defined
relative to the preceding joint coordinates or to some other
coordinate system. (ISO 8373)
JOINT DISPLACEMENT: The signed magnitude of the
change in position of a joint. (R15.07)
JOINT MOTION: A method for coordinating the
movement of the joints such that all joints arrive at the
desired location simultaneously. (R15.06)
JOINT VELOCITY: The time rate of change of joint
displacement. (R15.07)
JOYSTICK: A manually controlled device whose
variable position and orientation or applied forces are
measured and result in commands to the robot control
system. (ISO 8373)
K
KEY
TRANSFER
: A system that uses one or more key operated interlocks,
installed external to the hazard area of the production system,
to permit operation only in a prearranged sequence. (B-11
Definitions Manual)
KINEMATIC COORDINATE SYSTEM: A coordinate system
at the beginning of the kinematic chain defined by the robot
manufacturer and referenced to the base coordinate
system. (R15.07)
KINEMATICS, FORWARD: The mathematical relationship
which determines the pose of the robot Tool Coordinate
System TCS based on the values of the principal joint
displacements. (R15.07)
KINEMATICS, INVERSE: The mathematical relationship
which determines the principal joint displacements based on the
values of the robot Tool Coordinate System TCS.
(R15.07)
KNOCKOUT: A mechanism for releasing material from
either die.
L
LEAD SCREW
: On a lathe, a power screw used to
feed the tool when chasing threads. (B-11 Definitions
Manual)
LEARNING CONTROL: A control scheme whereby the
experience obtained during previous cycles is automatically
used to change control parameters and/or algorithms. (ISO
8373)
LED: Light emitting diode used to indicate device
status.
LIFTOUT: The mechanism for releasing the material
or workpieces(s) from the lower dies. (B-11 Definitions
Manual)
LIGHT CURTAIN: An array of photoelectric sensing
beams configured to sense objects passing anywhere through an
area (sensing plane). Some light curtains process the
data from the array to measure the profile of the object or
track its movement with the array.
LIMITING DEVICE: A device that restricts the
maximum envelope (space) by stopping or causing to stop all
robot motion and is independent of the control program and the
application programs. (R15.06)
LIMITING LOAD: The maximum load stated by
the manufacturer which can be applied to the mechanical
interface without any damage or failure to the robot
mechanism under restricted operating conditions. (ISO
8373)
LINE VOLTAGE: The normal in-plant power line
supply voltage which is usually 120 or 220-240
VAC.
LINK: A rigid body which maintains a fixed
relationship between joints. (ISO 8373)
LINK COORDINATE SYSTEM: A coordinate system
attached to the link.
(R15.07)
LOAD: The force and/or torque at the mechanical
interface which can be exerted along the various directions
of motion under specified conditions of velocity and
acceleration. The load is a function of mass, moment of
inertia, and static and dynamic forces supported by the
robot. (ISO 8373).
LOCKOUT/TAGOUT: The placement of a lock (or tag) on an
energy isolating device, such as a disconnect switch or
shut-off valve, in accordance with established safe work
procedure. (B-11 Definitions Manual)
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