Do Not Start Partial Infeed Too Early; Assignment Of Oscillation And Infeed Axes Oscill - Siemens SINUMERIK Series Function Manual

P5: Oscillation - only 840D sl
11.3 Oscillation controlled by synchronized actions
11.3.6

Do not start partial infeed too early

Function
The functions described above prevent any infeed movement outside the reversal point or
the reversal point range. On completion of an infeed movement, however, restart of the next
partial infeed must be prevented.
Application
A channel-specific flag is used for this purpose. This flag is set at the end of the partial infeed
(partial distance-to-go == 0) and is deleted when the axis leaves the reversal point range.
The next infeed movement is then prevented by a synchronized action.
Programming
WHENEVER $AA_DTEPW[infeed axis] == 0
DO $AC_MARKER[Index]=1
and, for instance, for reversal point 1:
WHENEVER $AA_IM[Z] <> $SA_OSCILL_REVERSE_POS1[Z]
DO $AC_MARKER[Index]=0
WHENEVER $AC_MARKER[index]==1
DO $AA_OVR[infeed axis]=0
Explanation of system variables:
$AA_DTEPW[infeed axis]: axial remaining travel distance for the infeed axis in the MCS:
Path distance of the infeed axis
$AC_MARKER[index]: Channel-specific marker with index
$AA_IM[oscillation axis]: Current position of oscillation axis
$SA_OSCILL_REVERSE_POS1[oscillation axis]: Reversal point 1 of the oscillation axis
$AA_OVR[infeed axis]: Axial override for infeed axis
Explanation of key words:
WHENEVER ... DO ... always when the condition is fulfilled, then ...
11.3.7

Assignment of oscillation and infeed axes OSCILL

Function
One or several infeed axes are assigned to the oscillation axis with command OSCILL.
Oscillation motion starts.
662
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
Extended Functions