Synchronous Operation Of Lifting Columns; Different Heights; Parallel Alignment; Bends In The Table Frames - RK Rose+Krieger Multilift II Instrucciones De Montaje

7. Life Phases

7.3.1 Synchronous operation of lifting columns

In an ideal case, two or more lifting columns are parallel to each other and run up and down synchro-
nously. In reality, there are numerous factors which do not allow this simple way of considering the pro-
blem. Production tolerances are unavoidable when manufacturing lifting columns, as well as their own
construction components. In the worst case, the tolerances for various components may be cumulative
and lead to twisting and damage.

7.3.2 Different heights

A rigid connection between lifting columns at the same
height is essential. If the table frame is firmly bolted down,
the lifting columns are tensioned. Consequently, the
running properties deteriorate and the working life is redu-
ced. The cause of different heights is usually an uneven base.
Therefore, the baseplate of the lifting column should be va-
riable in height.
However, it is also possible that production tolerances mean
that the lifting columns are at different heights when closed
together. In this case, the limit switches on some lifting co-
lumns can be adjusted for height.

7.3.3 Parallel alignment

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X1 X2
If the lifting columns are not parallel to each other, then the
distance between the top fastening points changes during
motion. However, a rigid connection keeps this distance
constant. The consequence is that considerable forces act on
the lifting column guide, which can be damaged by this.
In this case, the lifting columns should also be aligned exact-
ly. Uneven floors can be compensated by using an adjustable
baseplate.

7.3.4 Bends in the table frames

Table frames are generally made of welded steel tubes and
connection plates for connecting to the lifting columns. If
the connecting plates are not flat against the lifting column,
then the synchro system is stressed during screwing. This
generates unwanted transverse forces which stress the lif-
ting column guide. Please ensure that the components are
working perfectly.
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