Preconditions - Siemens SINUMERIK 840D sl Function Manual

M3: Coupled axes
5.4 Electronic gearbox (EG)
• 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
5.4.1.2

Preconditions

The "Electronic Gearbox" option or the relevant option of generic coupling (refer to
" Preconditions [Page 268] " 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
All paths are referred to the basic co-ordinate system BCS.
When an EG axis group is activated, it is possible to synchronize the leading axes and
following axis in relation to a defined starting position.
From the parts program a gearbox group can be:
• defined,
• activated,
• deactivated,
• deleted.
Extensions
The influence of each of the 5 leading axes can be specified using a curve table as an
alternative to a transmission ratio (KF=numerator/denominator).
248
= SynPosFA + (LA SynPosLA
1-
: from call EGONSYN (see below)
i
: Partial setpoint of the following axis.
)*CF +... +(LA SynPosLA
1 1 5-
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
)*CF
5 5
Special Functions