Reversal Of The Master Axis Movement / Reverse Motion Stop - Beckhoff TwinCAT 2 Manual

8 Reversal of the master axis movement /
reverse motion stop
The behavior of the Universal Flying Saw in case of a motion reversal of the master can be defined via 2 bits
of the SyncMode. The GEARINSYNC_OPMASK_ROLLBACKLOCK bit activates the backstop, which
immobilizes the slave if the master moves backwards beyond the coupling position (the position where the
Universal Flying Saw was started) after a motion reversal. The second bit,
GEARINSYNC_OPMASK_INSTANTSTOPONROLLBACK, governs dynamic aspects of how the slave
comes to a halt.
The effect of these two bits must be differentiated according to whether the synchronous phase is reached
before the motion reversal, or whether the motion reversal already occurs in the synchronization phase.
The following overview explains in detail the effect of the GEARINSYNC_OPMASK_ROLLBACKLOCK and
GEARINSYNC_OPMASK_INSTANTSTOPONROLLBACK bits.
ROLL INSTANT Synchro-
BACK STOP nous
LOCK ON phase
ROLLBACK reached?
0 0
0 0
TS5055

Reversal of the master axis movement / reverse motion stop

Description
yes Case 1:
With the bit combination specified on the left, synchronous coupling is
maintained for all master movements once the Universal Flying Saw is in
the synchronous phase. In the figure below, a motion reversal of the
master axis occurs in the synchronous phase, so that it moves backwards
beyond the coupling position. The synchronous coupling is maintained
here, so that the slave also moves backwards beyond the coupling
position.
no Case 2:
Before reaching the synchronous phase, a motion reversal of the master
axis takes place in the synchronization phase so that it moves backwards
beyond the coupling position. Since the synchronous phase has not been
reached, in this case the velocity of the slave axis is reduced with a 5th
order polynomial when the coupling position is reached and the axis is
brought to a standstill.
Version: 1.3
NOTE
25