Siemens SINUMERIK 840D sl Function Manual page 286

Manual and Handwheel Travel (H1)
Brief description
Feedrate override
The JOG velocity can also be influenced by the axial feedrate override switch provided that
interface signal
DB31, ... DBX1.7 (axial feedrate override active) is active.
Percentages are assigned to the individual feedrate-override switch positions via machine
data. For a switch position of 0% the axis is not traversed, provided that 0 is entered in the
associated machine data.
Interface signal
DB31, ... DBX1.7 (axial feedrate override active)
has no meaning at switch position 0%.
Instead of being set by the feedrate-override-switch position (gray code), the percentage
value (0% to 200%) can be set directly by the PLC. Again, the selection is made via machine
data.
References:
/FB1/ Function Manual Basic Functions; Feedrates (V1)
Acceleration
With manual travel, acceleration takes place according to a programmed characteristic. The
acceleration characteristic active in JOG for each axis is defined, using the following axial
machine data (default setting of axial jerk limitation).
MD32420 $MA_ JOG_AND_POS_JERK_ENABLE
References:
/FB1/ Function Manual, Basic Functions; Acceleration (B2)
Display
The JOG main screen appears when JOG mode is selected. This main screen contains
values relating to position, feedrate, spindle, and tool.
For clarifications on the individual display values, please refer to:
References:
/BA/ SINUMERIK 840D HMI User Manual
Coordinate systems
In JOG mode, the user has the option to traverse axes in different coordinate systems.
The following coordinate systems are available:
● Basic coordinate system
● Workpiece coordinate system
286
Each axis can be traversed manually.
Only geometry axes can be traversed manually (channel-specific).
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions