Siemens SINUMERIK 840Di Function Manual page 2033

Intermediate blocks
Motions with selected → tool offset (G41/G42) may be interrupted by a limited number of
intermediate blocks (blocks without axis motions in the offset plane), whereby the tool offset
can still be correctly compensated for. The permissible number of intermediate blocks that
the control reads ahead can be set via system parameters.
Interpolator
Logic unit of the → NCK that defines intermediate values for the motions to be carried out in
individual axes based on information on the end positions specified in the part program.
Interpolatory compensation
Interpolatory compensation is a tool that enables manufacturing-related leadscrew error and
measuring system error compensations.
Interrupt routine
Interrupt routines are special → subroutines that can be started by events (external signals)
in the machining process. The part program block that is being executed is aborted, and the
interruption point of the axes is stored automatically.
Inverse time feedrate
With SINUMERIK 840D, the time required for the path of a block to be traversed can be
programmed for the axis motion instead of the feed velocity (G93).
JOG
Control mode (setup mode): In JOG mode, the machine can be set up. Individual axes and
spindles can be moved in JOG mode using the direction keys. Additional functions in JOG
mode include: → Reference point approach, → Repos, and → Preset (set actual value).
Key switch
The key switch on the → machine control panel has 4 positions that are assigned functions
by the operating system of the control. The key switch has three different colored keys that
can be removed in the specified positions.
Keywords
Words with specified notation that have a defined meaning in the programming language for
→ part programs.
Leading axis
The leading axis is the → gantry axis that exists from the point of view of the operator and
programmer and, thus, can be influenced like a standard NC axis.
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Glossary
Glossary-9