Programming manual.
CNC 8070
22.
STATEMENTS AND INSTRUCTIONS
Programming statements
·404·
(REF: 1709)
Considerations for the synchronization
The #SYNC function may be executed either in open loop (M3 or M4) or in closed loop (M19)
In the synchronization, the master spindle can work in either open or closed loop; the slave
spindle is always in closed loop.
Several pairs of synchronized spindles may be programmed in the same instruction #SYNC
or #TSYNC. Several consecutive #SYNC instructions can also be programmed with an
additive effect as long as they do not conflict with the previous ones.
The slave spindle must be in the channel where the synchronization is activated whereas
the master spindle may be in any channel. Several slave spindles may have the same master
spindle, but a slave spindle cannot be the master of a third one; thus preventing synchronism
loops.
It is possible to program either first the synchronism in speed and then in position or both
at the same time. Once a pair has been synchronized, it is possible to change its speed ratio
and/or its offset (shift); if necessary, the spindles will get out of synchronism and back in
synchronism to make the change.
Both spindles must operate in closed loop in order to assure proper follow-up. Once they're
both in closed loop, the slave spindle switches from its current speed to the synchronism
speed. The master spindle may be turning when programming the synchronization and it
will switch to closed loop maintaining its rotation.
Programming the master and slave spindles
For the slave spindle, it is not possible to program the speed, the spindle functions M3, M4,
M5 and M19, gear changes M41 through M44 or change the speed override.
The following functions may be programmed for the master spindle:
• Change the spindle speed via PLC or CNC.
• Execute the speed functions G94, G95, G96 and G97.
• Execute the auxiliary functions M3, M4, M5 and M19.
• Change the spindle speed override via PLC, CNC or keyboard.
• Change the spindle speed limit via PLC or CNC.
• If the C axis is activated, define the XC or ZC plane.
When defining the synchronization or when it is active, the master spindle can work as C
axis or in G63. Functions G33, G95 or G96 may also be active at the master spindle.
Functions G33 and G95 may also be active at the slave spindle, but function G96 will stay
temporarily "frozen" and without effect during the synchronization.
On the other hand, the synchronized spindles cannot change channels and it is not possible
to change gears M41 through M44. If the gear change is automatic and the new speed
requires a gear change, the relevant error message will be issued.
Work gear
The spindles may have different gears (ranges). If at the time of the synchronization, the
spindles are not in the same state, the slave "freezes" its state, changes the gear indicated
by machine parameter SYNCSET and is forced to follow the master.
If the master belongs to the same channel, it also changes to the gear indicated by its
parameter SYNCSET If the master is in another channel, the gear must be activated before
activating the synchronization. Therefore, it is up to the user to prepare the master spindle
so the slave can synchronize it with it.
Machine reference (home) search
The slave spindle must be homed (referenced) before activating the position synchronism
if it has been homed before. If the master spindle is in the same channel and has not been
homed, it is also forced to be homed. An error message will be issued if the master spindle
is in another channel and it has not been homed.
#UNSYNC
Uncouple one or several spindles
The programming format is: Optional parameters are indicated between the <> characters.
#UNSYNC
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