Siemens SINUMERIK 840D sl Function Manual page 299

A traversing movement defined by the handwheel for a machine axis is defined by:
● Traverse path
● Size of the variable increment
● Machine-axis assignment
Movement in the opposite direction
MD11310 $MN_HANDWH_REVERSE (threshold for direction change handwheel)
Depending on the machine data mentioned above, behavior for a change of traversing
direction is as follows:
● If the handwheel is moved in the opposite direction, the resulting distance is computed
● If the handwheel is moved in the opposite direction by at least the number of pulses
Acceleration
With handwheel travel, acceleration takes place according to an acceleration characteristic
defined using axial machine data (default setting of axial jerk limitation):
MD32420 $MA JOG_AND_POS_JERK_ENABLE
References:
/FB1/ Function Manual, Basic Functions; Acceleration (B2)
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
(SD41010 $SN_JOG_VAR_INCR_SIZE)
(MD32080 $ HANDWH_MAX_INCR_SIZE)
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 immediately.
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 another movement takes place only after the axis reaches zero speed
(setpoint side).
Manual and Handwheel Travel (H1)
Handwheel travel in JOG
299