Parameter Assignment - Siemens SINUMERIK 840D Function Manual

H1: Manual traversing
17.6 Manual traversing using a handwheel
For other NC/PLC interface signals (hold signals), the influence of manually traversing using
the handwheel (cancellation or interruption of traversing motion) can be set (see Chapter
"Parameter assignment (Page 658)").
NC STOP only interrupts the traversing movement. Any setpoint/actual-value difference is
retained. The distance-to-go is then traversed using NC START.
See also
Monitoring functions (Page 723)
S1: Spindles (Page 733)
17.6.2

Parameter assignment

Distance or velocity specification
Either the distance or the velocity can be entered via the handwheel:
● Distance specification (default setting)
The distance specified by the handwheel is traversed and No pulses are lost.
Limiting the velocity to the maximum permissible value causes the axes to overtravel.
● Velocity specification
The handwheel only defines the traverse velocity. As soon as the handwheel stops, the
axes stop too. Motion is braked immediately if no pulses are supplied from the handwheel
in one IPO cycle, thus preventing overtravel by the axes. The handwheel pulses do not
supply a path default.
The input mode is set with machine data:
MD11346 $MN_HANDWH_TRUE_DISTANCE (handwheel distance or velocity specification)
Pulse evaluation of the handwheel
The number of pulses that are to be generated per handwheel detent position must be specified
for each handwheel:
MD11320 $MN_HANDWH_IMP_PER_LATCH [<n>] (handwheel pulses per detent position)
Note
Input of a negative value results in a reversal of the handwheel direction of rotation.
Increment size
The number of increments to be traversed by the axis per handwheel pulse is determined by
the selected increment size.
658
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA