Deselecting The Synchronous Mode For The Part Program - Siemens SINUMERIK 840D sl Function Manual

S3: Synchronous spindle
14.1 Brief description
Example:
LS and FS are already coupled in a friction lock via a workpiece after power ON.
14.1.5

Deselecting the synchronous mode for the part program

Open coupling (COUPOF, COUPOFS)
Synchronous mode between the specified spindles is canceled by the parts program
instruction COUPOF. Three variants are possible.
If synchronous mode is canceled between the specified spindles using COUPOF, then it is
irrelevant whether this coupling is permanently configured or user defined. The leading and
following spindles can be at standstill or in motion when synchronous operation is deactivated.
On switching off the synchronous mode with COUPOF, the following spindle is put into control
mode. The originally programmed S-word is no longer valid for the FS, the following spindle
can be operated like any other normal spindle.
When the coupling is opened with COUPOF, a block preprocessing stop STOPRE is generally
initiated internally in the control.
The COUPOFS instruction can be used to open a coupling either as quickly as possible with a
stop and no position data or with a stop at the programmed position.
COUPOF variants
Three different methods can be used to deselect synchronous mode with COUPOF:
1. Deactivation of coupling as quickly as possible
The block change is enabled immediately.
COUPOF(FS, LS)
2. A coupling is not deselected until the following spindle has crossed the programmed
deactivation position POS
The block change is then enabled.
COUPOF(FS, LS, POS
3. A coupling is not deselected until the following spindle and leading spindle has crossed the
programmed deactivation positions POS
The block change is then enabled.
COUPOF(FS, LS, POS
POS , POS
FS LS
Deactivation positions POS
referred to the defined reference point value.
Range of POS
References:
Function Manual Basic Functions; Reference Point Approach (R1)
760
.
FS
)
FS
, POS )
FS LS
and POS
FS
, POS : 0 ... 359,999°.
FS LS
and POS .
FS LS
match the actual positions of FS and LS respectively
LS
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions