Siemens SINUMERIK 840D sl Function Manual page 286

H1: Manual travel and handwheel travel
4.1 Brief description
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
Geometry axes
In manual travel, a distinction must be made as to whether the affected axis is to be
traversed as a machine axis (axis-specific) or as a geometry axis (channel-specific).
First we will focus on the characteristics of machine axes. Special features relating to manual
traversal of geometry axes are described in more detail in "Geometry-axis manual travel".
Spindle manual travel
Spindles can also be traversed manually in JOG mode. Essentially, the same conditions
apply as for manual travel of axes. Spindles can be traversed in JOG mode using the
traversing keys continuously or incrementally, in jog or continuous mode, or using the
handwheel. The mode is selected and activated via the axis-/spindle-specific PLC interface
as for the axes. The axis-specific machine data also apply to the spindles. Special features
relating to manual traversal of spindles are described in more detail in "Special features of
spindle manual travel".
286
Each axis can be traversed manually.
Only geometry axes can be traversed manually (channel-specific).
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions