Programming - Siemens SINUMERIK 840D sl Function Manual

H1: Manual and handwheel travel
4.9 Approaching a fixed point in JOG
Axis dynamics
The axis-specific acceleration and the axis-specific jerk for "Approaching fixed point in JOG"
are determined by the following machine data:
● When traversing with traverse keys or handwheel:
– MD32301 $MA_JOG_MAX_ACCEL (maximum axis-specific acceleration for JOG
– MD32436 $MA_JOG_MAX_JERK (maximum axis-specific jerk for JOG movements)
● During traversing via the G75 part program command:
– MD32300 $MA_MAX_AX_ACCEL [0/1] (maximum axis-specific acceleration for path
– MD32431 $MA_MAX_AX_JERK [0] (maximum axis-specific jerk for path motions in the
Reference:
Function Manual, Basic Functions; Acceleration (B2)
4.9.3

Programming

System variables
The following system variables that can be read in the part program and in the synchronous
actions for the "Approach fixed point" function.
System variable
$AA_FIX_POINT_SELECTED [<Axis>]
$AA_FIX_POINT_ACT [<Axis>]
190
movements)
Note
MD32436 $MA_JOG_MAX_JERK is only effective when the axis-specific jerk limitation
for single-axis movements has been enabled for the machine axes to be traversed:
MD32420 $MA_JOG_AND_POS_JERK_ENABLE [<axis>] == TRUE
motions in the dynamic response mode DYNNORM/DYNPOS)
Note
The type of positioning axis dynamics (DYNNORM or DYNPOS) is defined by the
machine data:
MD18960 $MN_POS_DYN_MODE = <mode>
dynamic response mode DYNNORM)
Note
MD32431 $MA_MAX_AX_JERK is only effective when the axis-specific jerk limitation
for single-axis movements has been enabled for the machine axes to be traversed:
MD32420 $MA_JOG_AND_POS_JERK_ENABLE [<axis>] == TRUE
Description
Number of fixed point to be approached
Number of the fixed point on which the axis is cur‐
rently located
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions