Siemens SINUMERIK 840D sl Function Manual page 251

Activation response
An electronic gearbox can be activated in two different ways:
1. On the basis of the axis positions that have been reached up to now in the course of
processing the command to activate the EG axis group is issued without specifying the
synchronizing positions for each individual axis.
EGON (see Chapter "Definition of an EG Axis Group")
2. The command to activate the EG axis group specifies the synchronized positions for each
axis. From the point in time when these positions are reached, the EG should be
synchronized.
EGON (see Chapter "Switch-on of an EG Axis Group")
3. The command to activate the EG axis group specifies the synchronized positions and
approach mode for each axis. From the point in time when these positions are reached,
the EG should be synchronized.
EGONSYNE (see Chapter "Switch-on of an EG Axis Group")
Synchronization with EGON
With EGON(), no specifications are made for the positions at which the following axis is to be
synchronized. The control system activates the EG and issues the signal "Synchronized
position reached".
Synchronization for EGONSYN
1. With EGONSYN(), the positions of the leading axes and the synchronization position for
the following axis are specified by the command.
• The control then traverses the following axis with just the right acceleration and velocity to
the specified synchronization position so that the following axis is in position with the
leading axes at its synchronization position.
• If the following axis is stationary: If the "Feed stop/spindle stop" DB 31, ... DBX 4.3 is set
for the following axis, the following axis is not set in motion by EGON or EGONSYN. A
travers command is issued and block changing is blocked until the axis-specific feed is
enabled. EGOSYN is topped by RESET transformed into EGON. The programmed
synchronized positions are deleted.
• If the following axis is not stationary: The NST "Feed Stop/Spindle Stop" DB31, ... DBX4.3
has no direct influence on the electronic gearbox. As before, it does have an indirect effect
on the leading axes, if these are located in the same channel. .
• For channel specific feed enabling and for override nothing is implemented. Override still
has no direct influence on the electronic gearbox. The axis-specific feed enable is set,
depending on the current override setting.
Synchronization for EGONSYNE
With EGONSYN(), the positions of the leading axes and the synchronization position for the
following axis are specified by the command.
The control system moves the following axis to the synchronized position according to the
program approach mode.
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
M3: Coupled axes
5.4 Electronic gearbox (EG)
251