Siemens SINUMERIK 828D Function Manual page 1761

Glossary
Interpolatory compensation
Interpolatory compensation is a tool that enables manufacturing-related leadscrew error and measuring system
error compensations (SSFK, MSFK).
Interrupt routine
Interrupt routines are special → subroutines that can be started by events (external signals) in the machining
process. A part program block which is currently being worked through is interrupted and the position of the axes
at the point of interruption is automatically saved.
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 operating mode (setup mode): In JOG mode, the machine can be set up. Individual axes and spindles
can be traversed in JOG mode by means of 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 four 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.
KV
Servo gain factor, a control variable in a control loop.
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.
Leadscrew error compensation
Compensation for the mechanical inaccuracies of a leadscrew participating in the feed. The control uses stored
deviation values for the compensation.
Basic Functions
1761
Function Manual, 09/2011, 6FC5397-0BP40-2BA0