Manual Traversing Of The Spindle - Siemens SINUMERIK 840D Function Manual

Figure 17-4
Supplementary conditions
NC stop
With NC stop present, no travel command and, therefore, no travel request is output. There is
an exception with DRF travel: If DRF travel is permitted in the NC stop state via machine data
MD20624 $MC_HANDWH_CHAN_STOP_COND (bit 13 == 1), the behavior corresponds to
that of manual traversing using a handwheel.
17.7

Manual traversing of the spindle

Spindle mode
Manual traversing of the spindle is possible both in positioning mode (spindle is in position
control) and in open-loop control mode.
Velocity
The velocity applied for the manual traversing of the spindles is defined by the general setting
data:
SD41200 $SN_JOG_SPIND_SET_VELO (speed of spindle in JOG mode)
If "0" is entered in SD41200, the axis-specific machine data takes effect:
MD32020 $_MA_JOG_VELO (conventional axis velocity)
The maximum speeds of the active gear stage are also considered when manually traversing
a spindle.
Further information
S1: Spindles (Page 733)
Spindle override
The velocity during manual traversing of the spindle can be influenced by the spindle override
switch.
Acceleration
As a spindle often uses many gear stages in speed-control mode and position-control mode,
the acceleration associated with the current gear stage is always applied to the spindle in JOG
mode.
Further information
S1: Spindles (Page 733)
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Signal-time diagram:Manual traversing using a handwheel with velocity setpoint, stop
condition is a cancellation criterion
H1: Manual traversing
17.7 Manual traversing of the spindle
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