Examples; Example Using Linear Couplings - Siemens SINUMERIK 840D sl Function Manual

M3: Coupled axes
8.4 Electronic gear (EG)
Name Type
$P_EG_BC[a] STRING
$AA_EG_ INT
NUM_LA[a]
$AA_EG_ AXIS
AX[n,a]
$AA_EG_ BOOL
ACTIVE[a,b]
$VA_EG_ REAL
SYNCDIFF[a]
8.4.9

Examples

8.4.9.1

Example using linear couplings

Use of axes
The following diagram shows the configuration of a typical gear hobbing machine. The machine
comprises five numerically closed loop controlled axes and an open loop controlled main
spindle. These are:
● The rotary motion of the workpiece table (C) and hobbing cutter (B).
● The axial axis (Z) for producing the feed motion over the entire workpiece width.
● The tangential axis (Y) for moving the hobbing cutter along its axis.
358
Access Preprocessing
stop
part Sync part pro‐
pro‐ act. gram
gram
R R
R R
R R
R R
R R R
Meaning, value
Sync
act.
Block change criterion for
EG activation calls: EGON,
EGONSYN:
"NOC": immediately
"FINE": Synchronoous tra‐
verse fine
"COARSE": Synchronous
traverse coarse
"IPOSTOP": Setpoint-
based synchronism
Number of leading axes de‐
fined with EGDEF. 0 if no
axis has been defined as a
following axis with EGDEF.
Axis name of leading axis
whose index n has been
specified.
Determine power-on state
of a leading axis:
0: Switched off
1: activated
Actual value of synchron‐
ism difference. A compari‐
son of machine data
MD37200 $MA_COU‐
PLE_POS_TOL_COARSE
and MD37210 $MA_COU‐
PLE_POS_TOL_FINE pro‐
duces interface signals.
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Cond. Index
Axis name
a: Following axis
Axis name
a: Following axis
Axis name
n: Index of leading axis in
the EG coupling 0 ... 4
a: Following axis
Axis name
a: Following axis
b: Leading axis
Axis name
a: Following axis
Special functions