Preconditions - Siemens SINUMERIK 840D sl Function Manual

Curve tables
Non-linear relationships between lead and following axes can also be implemented using curve
tables.
Cascading
Electronic gearboxes can be cascaded, i.e. the following axis of an electronic gearbox can be
the leading axis for a subsequent electronic gearbox.
Synchronous position
An additional function for synchronizing the following axis allows a synchronous position to be
selected:
● Approach next division (tooth gap) time-optimized
● Approach next division (tooth gap) path-optimized
● Approach in positive direction of axis rotation, absolute
● Approach in negative direction of axis rotation, absolute
● Traverse time-optimized with respect to programmed synchronized position
● Traverse path-optimized with respect to programmed synchronized position
Application Examples:
● Machine tools for gear cutting
● Gear trains for production machines
8.4.1.2

Preconditions

The "Electronic Gearbox" option or the relevant option of generic coupling (refer to
" Preconditions (Page 368) " in the "Brief description" of Generic Coupling) is required for the
usage of function.
Function
With the aid of the "Electronic gearbox" the movement of a following axis FA can be interpolated
dependent of up to five leading axes LA. The relationship between each leading axis and the
following axis is defined by a coupling factor. The following axis motion components derived
in this manner from the individual leading axis motion components have an additive effect.
FA
set
with:
SynPosFA, SynPosLA
FA
setpoint
LA : Setpoint or actual value of the ith leading axis (depending on the type of coupling - see
i
below)
KF : Coupling factor of the ith leading axis (see below)
i
Special functions
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
= SynPosFA + (LA SynPosLA
1-
: from call EGONSYN (see below)
i
: Partial setpoint of the following axis.
)*CF +... +(LA SynPosLA
1 1 5-
M3: Coupled axes
8.4 Electronic gear (EG)
)*CF
5 5
341