Detailed Description
2.1 Spindle modes
Spindles (S1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-17
Spindle speed < Position-control activation speed (Phase 5, 5a)
The spindle is stationary and has reached the end point. Position control is active and holds
the spindle in the programmed position.
NC/PLC IS:
DB31, ... DBX60.6 (position reached with exact stop coarse)
and
DB31, ... DBX60.7 (position reached with exact stop fine)
are set if the distance between the spindle actual position and the programmed position
(spindle setpoint position) is less than the settings for the exact stop fine and coarse limits.
This is defined in machine data:
MD36010 $MA_STOP_LIMIT_FINE
and
MD36000 $MA_STOP_LIMIT_COARSE.
Note
The positioning action is considered complete when the end-of-positioning criterion is met
and signaled.
This requires "Exact stop fine". This applies to SPOS, M19 or SPOSA from the part program,
synchronized actions and spindle positioning by the PLC using FC 18.
Positioning from standstill
A distinction is made between two cases with regard to positioning from standstill:
• Case 1: The spindle is not synchronized.
This is the case if the spindle is to be positioned after switching on the control and drive
or after a gear step change (e.g., for a tool change).
MD31040 $MA_ENC_IS_DIRECT = 0
• Case 2: The spindle is synchronized.
This is the case if, after switching on the control and drive, the spindle is to be rotated
through a minimum of one revolution with M3 or M4 and then stopped with M5
(synchronization with the zero mark) before the first positioning action.
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