NCK start-up
10.6 Parameterization of spindle data
CNC Part 1 (NCK, PLC, drive)
Commissioning Manual, 11/2006, 6FC5397-2AP10-2BA0
167
10.6.5 Position spindle
The NC provides an oriented spindle stop function with which the spindle can be moved into
a certain position and held there (e.g. for tool changing purposes). Several programming
commands are available for this function which define the approach and program
processing.
Literature
Function Manual Basic Functions; Spindles
Functionality
• To absolute position (0-360 degrees)
• Incremental position (+/- 999999.99 degrees)
• Positioning without influence of block change (SPOSA)
• Block change when block end position is reached (calculated by interpolation)
The control brakes the spindle down to position control speed at the acceleration rate for
speed operation.
If position control speed has been reached, the control branches into position control mode
and the acceleration rate for position control mode and the K
V
factor become active.
The interface signal "Exact stop fine" is output to indicate that the programmed position has
been reached (block change when position reached).
Acceleration rate for position control mode must be set such that the current limit is not
reached. Acceleration rate must be entered separately for each gear step.
If the spindle is positioned from zero speed, it is accelerated up to a maximum speed
corresponding to position control speed; the direction is defined via machine data. If no
reference is on hand the direction of movement is as in MD35350
SPIND_POSITIONING_DIR. When position control mode is switched on, contour monitoring
is activated.
Machine data
Table 10-29 Spindle positioning: Machine data
axisspecific ($MA_ ... )
35300 SPIND_POSCTRL_VELO position control activation speed
35350 SPIND_POSITIONING_DIR Direction of rotation when positioning from the
standstill
35210 GEAR_STEP_POSCTRL_ACCEL Acceleration in position control mode
36000 STOP_LIMIT_COARSE Exact stop coarse
36010 STOP_LIMIT_FINE Exact stop fine
32200 POSCTRL_GAIN K
V
factor
36400 CONTOUR_TOL Contour monitoring
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