Programming principles
1.4 Spindle movements
Turning Part 2: Programming (Siemens instructions)
Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
63
1.4.2.2 Spindle positioning (SPOS, SPOSA, M19, M70, WAITS): Further information
Further information
Positioning with SPOSA
The block step enable or program execution is not affected by SPOSA. The spindle
positioning can be performed during execution of subsequent NC blocks. The program
moves onto the next block if all the functions (except for spindle) programmed in the current
block have reached their block end criterion. The spindle positioning operation may be
programmed over several blocks (see WAITS).
NOTICE
If a command, which implicitly causes a preprocessing stop, is read in a following block,
execution of this block is delayed until the positioning spindle is stationary.
Positioning with SPOS/M19
The block step enabling condition is met when all functions programmed in the block reach
their end-of-block criterion (e.g. all auxiliary functions acknowledged by the PLC, all axes at
their end point) and the spindle reaches the programmed position.
Velocity of the movements:
The velocity and the delay response for positioning are stored in the machine data. The
configured values can be modified by programming or by synchronized actions.
Specification of spindle positions:
As the
G90/G91 commands are not effective here, the corresponding dimensions apply
explicitly, e.g.
AC, IC, DC, ACN, ACP. If no specifications are made, traversing automatically
takes place as for
DC.
Synchronize spindle movements with WAITS
WAITS can be used to identify a point at which the NC program waits until the spindle
programmed with
SPOSA in a previous NC block reaches its position.
Example:
N10 SPOSA[1]=180 SPOSA[1]=0
G01 X34
G00 X10
N40 WAITS(1) ; The block waits until the spindle 1 has
reached the position specified in block N10.
WAITS can be used after M5 to wait until the spindle(s) has (have) stopped. WAITS can be used
after
M3/M4 to wait until the spindle has reached the specified speed/direction of rotation.
Note
If the spindle has not yet been synchronized with synchronization marks, the positive
direction of rotation is taken from the machine data (state on delivery).
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