Programming
10.4 Spindle movements
Cylindrical grinding
280 Programming and Operating Manual, 07/2009, 6FC5398-4CP10-2BA0
10.4.3 Spindle positioning: SPOS
Requirement
The spindle must be technically designed for position control.
Functionality
With the function SPOS= you can position the spindle in a specific angular position. The
spindle is held in the position by position control.
The speed of the positioning procedure is defined in machine data.
With SPOS=
value
from the M3/M4 movement, the respective direction of rotation is
maintained until the end of the positioning. When positioning from standstill, the position is
approached via the shortest path. The direction results from the respective starting and end
position.
Exception: First movement of the spindle, i.e. if the measuring system is not yet
synchronized. In this case, the direction is specified in machine data.
Other movement specifications for the spindle are possible with SPOS=ACP(...),
SPOS=ACN(...), ... as for rotary axes.
The movement takes place in parallel with any axis movements in the same block. This
block is ended when both movements are finished.
Programming
SPOS=... ; Absolute position: 0 ... <360 degrees
SPOS=ACP(...) ; Absolute dimensions, approach position in positive direction
SPOS=ACN(...) ; Absolute dimensions, approach position in negative
direction
SPOS=IC(...) ; Incremental dimensions, leading sign determines the
traversal direction
SPOS=DC(...) ; Absolute dimensions, approach position directly (on the
shortest path)
Programming example
N10 SPOS=14.3 ; Spindle position 14.3 degrees
...
N80 G0 X89 Z300 SPOS=25.6
Positioning spindle with axis movements. This block is
ended when all movements are finished.
N81 X200 Z300 ; The N81 block only begins once the spindle position
from N80 is reached.
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