Prerequisites For Synchronous Mode - Siemens SINUMERIK 840D sl Function Manual

Extended functions

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$AA_COUP_OFFS[S2] ; setpoint position offset = 77°

$VA_COUP_OFFS[S2] ; actual value position offset approx. 77°

$AA_COUP_CORR[S2] ; correction value = 4°

Prerequisites for synchronous mode

Conditions on selection of synchronous mode

The following conditions must be fulfilled before the synchronous spindle coupling is activated

or else alarm messages will be generated.

● The synchronous spindle coupling must have been defined beforehand (either permanently

configured via machine data or according to user definition via part program using

● The spindles to be coupled must be defined in the NC channel in which the coupling is

Channel-spec. MD20070 $MC_AXCONF_MACHAX_USED

axis spec. MD35000 $MA_SPIND_ASSIGN_TO_MACHAX

● The following spindle must be assigned to the NC channel in which the coupling is activated.

Default setting with axis-specific MD30550 AXCONF_ASSIGN_MASTER_CHAN

● The following applies to setpoint and actual value couplings (DV, AV):

FS and LS must at least have a position measuring system for recording positions and

position controls must be started up.

When position control is activated, the maximum setpoint speed of the LS is automatically

limited to 90% (control reserve) of the maximum speed. The limitation is signaled via IS

"Setpoint speed limited" (DB31, ... DBX83.1).

Function Manual, Basic Functions; Spindles (S1)

● The following applies to setpoint couplings (DV):

To ensure more accurate synchronization characteristics, the LS should be in position

control mode (language instruction SPCON) before the coupling is activated.

● Before selecting the synchronous mode, the gear stage necessary for FS and LS must be

selected. In synchronous mode, gear stage changeover and therefore oscillation mode are

not possible for FS and LS. Upon request, an alarm message is generated.

Extended Functions

Function Manual, 10/2015, 6FC5397-1BP40-5BA3

S3: Synchronous spindle

14.1 Brief description

Sinumerik 828d