Master And Stoker - Siemens SIMOTICS L-1FN3 Configuration Manual

Coupled motors

10.2 Master and stoker

Notes on parallel operation
The motor power cables must be the same length in order to ensure uniform current
distribution.
To operate multiple motors in parallel, you will have to provide space for additional motors
and cables. Plan the additional installation space required.
Add the masses of each primary section involved to the total mass of the slide of the axis.
The air gap must be identical on all primary sections.
The primary sections connected in parallel must be coupled with sufficient mechanical
rigidity.
The phase position of the EMFs of the primary sections connected in parallel must match.
To achieve this, in the installed state, the position of every primary section with respect to the
magnet grid of its secondary section must be the same.
10.2 Master and stoker
Mechanical arrangements
The first motor in an axis is called the "master". The master defines the positive direction of
motion of the axis. The second and each additional motor are called "stokers". The following
definitions also apply to each additional stoker. Which of the arrangements described below
is the preferable solution depends on the space requirement and the cable routing.
You can arrange two primary sections, to be operated electrically connected in parallel, on
either a single secondary section track or on two individual secondary section tracks. The
cable outlets can run in the same or opposite direction.
This results in the four mechanical arrangements shown below for the master and stokers
electrically connected in parallel:
570
Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
1FN3 linear motors