H1: Manual Traversing; Overview - Siemens SINUMERIK 840D Function Manual

H1: Manual traversing

17.1

Overview

Application
Even on modern, numerically controlled machine tools, a facility must be provided that allows
the user to traverse the axes manually.
Examples:
● Setting up the machine
Especially when setting up a new machining program, a manual traversing of the machine
axes is required. Where coordinate offset or rotation is selected, manual travel can even be
performed in the transformed workpiece coordinate system.
● Retraction of the tool after a program abort
After a program abort due to a power failure or RESET, the operator must manually retract
the tool from its current machining position. The transformations and coordinate systems
used for machining must remain active while this is done.
JOG mode
Manual traversing of axes is performed in JOG mode.
If JOG mode is active for the current mode group, this is reported to the PLC via the
corresponding interface signal:
DB11 DBX6.2 (BAG1: operating mode JOG)
DB11 DBX26.2 (BAG2: operating mode JOG)
...
DB11 DBX186.2 (BAG10: operating mode JOG)
Further information:
Function Manual Basic Functions; Mode group, channel, program operation, reset response
Display
If JOG mode is active, the basic JOG screen is displayed on the operator interface. This main
screen contains values relating to position, feedrate, spindle, and tool.
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
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