Siemens SINUMERIK 840C Installation Instructions Manual page 942

09.01
Selection
• Before synchronous operation is selected, the CONTROLLER ENABLE signal must be
present for both spindles. If this signal is not present, the reaction is as follows:
–
–
–
• After activation of a link, the block changes as a function of NC MD 526*bits 5,2 (block
change with fine synchronism or after synchronization reached).
• Block changes are interlocked after G402 and G043 as long as the signal INTERLOCK
LINK ON or PLC SPINDLE CONTROL is set.
• Synchronous operation for the following spindle can be activated even for non-referenced
leading and following spindles (no zero mark sensing). In other words, synchronous
operation can be activated even if the leading and following spindles are friction-locked via
a clamped workpiece after power on. Positional synchronism (G403) is not however
achieved until the leading and following spindles have been synchronized.
Deselection
• Synchronous operation can be deselected through programming of G400 or through
setting of the LINK OFF interface signal in the PLC for the following spindle.
• Block changes are interlocked after deselection of synchronous operation as long as the
signal INTERLOCK LINK OFF or PLC SPINDLE CONTROL is set.
• The following spindle continues to rotate at the current actual speed after deselection of
synchronous operation.
Operating modes
• When the link is not activated, the following and leading spindles can be traversed in all
operating modes.
• When the link is activated, the leading spindle can be traversed in the following operating
modes:
–
–
–
• The leading spindle cannot be operated in oscillation mode when the link is active.
• When the link is active, the following spindle is inhibited with regard to any commands
from the NC, PLC or command channel. In this case, only the controller enabling
command and GI-specific spindle signals have any influence on the following spindle.
• If a leading spindle is operating in C-axis mode, then it can act as a leading or following
axis in a GI grouping.
• The leading and following spindles cannot be switched over to C-axis operation when the
link is active. The GI grouping of the synchronous spindle may, however, remain
configured during switchover.
• When the link is active, the following spindle may only be operated in the mode specified
in the GI configuration (C axis or spindle).
© Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
More user manuals on
No switchover to synchronous operation takes place
No alarm is output
The block changes immediately.
Control mode from NC, PLC, command channel
Positioning mode from NC, PLC, command channel
C-axis mode (assignment between leading and following drives is maintained even if
the leading spindle is in C-axis mode and the link then activated).
ManualsBase.com
12.18.14 Special cases of gearbox interpolation
6FC5197- AA50
12 Functional Descriptions
12–167