Replacement Of Spos, Sposa, M19 (Spindle Positioning) - Siemens SINUMERIK 828D Function Manual

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Replacement of SPOS, SPOSA, M19 (spindle positioning)

When a coupling is active, the positioning commands (SPOS, SPOSA or M19) of a leading spindle are replaced by

calling a user-specific subprogram (replacement subprogram).

Application example

When machining workpieces in parallel on a double-spindle machine, the spindles are coupled through a

coupling factor not equal to 1. When changing the tool, they must be brought to the same position. The

replacement subprogram opens the coupling, separately positions the spindles at the tool change position and

then recloses the coupling.

Parameterization

MD30465 $MA_AXIS_LANG_SUB_MASK, bit 1 = 1

Time that the replacement subprogram is called

The time of the call cannot be set. The replacement subprogram is always called at the block start.

The call time depends on the configured output behavior of the auxiliary function to the PLC (see below

Output before or during motion: Subprogram call at the start of the block.

Output after motion: Subprogram call at the end of the block

MD22080 $MC_AUXFU_PREDEF_SPEC[9]

Output of the auxiliary function before the motion

Output of the auxiliary function during the motion

Output of the auxiliary function after the motion

System variable for transferring information

The replacement subroutine is provided with all of the information relevant to the functions programmed in the

block via system variables (see Chapter "System variable [Page 652]"). The data refer exclusively to the block, in

which the function to be replaced has been programmed.

Basic Functions

Function Manual, 09/2011, 6FC5397-0BP40-2BA0

K1: Mode group, channel, program operation, reset response

9.15 Replacing functions by subprograms

Sinumerik 840d sl