Siemens SINUMERIK 840D sl Function Manual page 175

Velocity
In handwheel travel the following axis velocities, effective during JOG mode, are used:
● SD41110 $SN_JOG_SET_VELO (axis velocity for JOG)
● SD41130 $SN_JOG_ROT_AX_SET_VELO (axis velocity for rotary axes for JOG mode)
● MD32020 $MA_JOG_VELO (conventional axis velocity)
Note
Because of the limited feedrate, the axis is not able to follow the handwheel rotation
synchronously, especially in the case of a large pulse weighting, and therefore overtravels.
Acceleration
As for manual travel (see "Parameter assignment (general) (Page 151) ").
Movement in the opposite direction
The behavior at a reversal of the traversing direction (by turning the handwheel in the opposite
direction) can be set in the machine data:
MD11310 $MN_HANDWH_REVERSE (threshold for direction change handwheel)
Value
= 0
> 0
Behavior at software limit switches, working-area limitation
When axes are traversed in JOG mode, they can traverse only up to the first active limitation
before the corresponding alarm is output.
Depending on the setting in the machine data:
MD11310 $MN_HANDWH_REVERSE (threshold for direction change, handwheel)
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Meaning
If the handwheel is moved in the opposite direction, the resulting distance is computed and
the calculated end point is approached as fast as possible.
If this end point is located before the point where the moving axis can decelerate in the current
direction of travel, the unit is decelerated and the end point is approached by moving in the
opposite direction. If this is not the case, the newly calculated end point is approached imme‐
diately.
If the handwheel is moved in the opposite direction by at least the number of pulses indicated
in the machine data, the axis is decelerated as fast as possible and all pulses received until
the end of the interpolation are ignored.
This means that another movement takes place only after the axis reaches standstill (setpoint
side).
H1: Manual and handwheel travel
4.6 Handwheel travel
175