Siemens SINUMERIK 840D sl Function Manual page 924

Synchronous Spindles (S3)
Configuration of a synchronous spindle pair via machine data
14.3 Configuration of a synchronous spindle pair via machine data
Coupling parameters
One synchronous spindle coupling per NC channel can be configured permanently via
channel-specific machine data.
It is then necessary to define the machine axes (spindles) which are to be coupled and what
characteristics this coupling should have.
The following parameters can be configured as fixed settings for the synchronous spindle
coupling:
● Synchronous spindle pair (channel-specific MD21300 $MC_COUPLE_AXIS_1[n])
● Speed ratio
● Block change behavior
● Type of coupling between FS and LS
924
This machine data defines the two machine axes which are to form the synchronous
spindle pair (following spindle (n=0), leading spindle (n=1)).
An entry of 0 as the setting for the axis number means that no coupling is permanently
configured via the machine data. The machine data for the coupling characteristics are
then irrelevant.
The machine axis numbers for the LS and FS can not be changed by the NC part
program for a configured coupling configuration.
This is entered via setting data using two speed ratio parameters (channel-spec.
SD42300 $SC_COUPLE_RATIO_1[n]) in the form of a numerator and a denominator.
k = speed ratio parameter numerator Speed ratio parameters for denominator =
Ü
$SC_COUPLE_RATIO[0] : $SC_COUPLE_RATIO[1]
Provided it is not write-protected, the speed ratio can be changed by the NC part program
with language instruction COUPDEF.
(channel-specific MD21320 $MC_COUPLE_BLOCK_CHANGE_CTRL_1)
One of the following options can be selected as the condition for a block change:
0: Block change takes place immediately
1: Block change in response to "Fine synchronism"
2: Block change in response to "Coarse synchronism"
3: Block change for IPOSTOP (i.e. after setpoint-end synchronism)
(channel-specific MD21310 $MC_COUPLING_MODE_1)
0: Actual value coupling (AV)
1: Setpoint coupling (DV)
2: Speed coupling (VV)
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions