Siemens SINUMERIK 840D Function Manual page 706

H1: Manual traversing
17.13 Use of handwheels in automatic mode
Handwheel weighting
The travel path of the axis that is generated by rotating the handwheel by one detent position
is dependent on several factors (see Section "Manual traversing using a handwheel
(Page 651)"):
● Selected increment size:
MD11330 $MN_JOG_INCR_SIZE_TAB[5] (increment size for INC/handwheel)
or
SD41010 $SN_JOG_VAR_INCR_SIZE (size of the variable increment for JOG)
● Weighting of an increment:
MD31090 $MA_JOG_INCR_WEIGHT
● Number of handwheel pulses per detent position:
MD11320 $MN_HANDWH_IMP_PER_LATCH
For example, the axis traverses by 0.001 mm per handwheel detent position if machine function
INC1 and the default setting of the above machine data are selected.
In the case of velocity override, the velocity results from the traverse path covered using the
handwheel within a certain period of time.
Example
Assumptions:
The operator turns the handwheel with 100 pulses/second.
The selected machine function is INC100.
The default setting is made for the above machine data for handwheel weighting.
⇒ Handwheel traverse path per second:
⇒ Velocity override:
PLC interface signals
As soon as the handwheel override takes effect, the following interface signals to the PLC are
set to signal 1:
● For positioning axes / concurrent positioning axes / command axes / reciprocating axes:
DB31, ... DBX62.1 (handwheel override active)
● For path axes:
DB21, ... DBX33.3 (handwheel override active)
706
10 mm
0.6 m/min
Function Manual, 06/2019, A5E47437747B AA
Axes and spindles