The Ideal Configuration - Phoenic Mecano Alpha Colonne Instrucciones De Montaje

7.3.5 The ideal configuration

With a synchro system, the positions are supposed to be
controlled during movement so that all lifting columns have
exactly the same height at all times. In practice, this is impos-
sible, because a controller must first detect a deviation befo-
re it can correct it. This means for the synchro system that a
deviation from an ideal synchronous move must always be
permitted.
Particular requirements are therefore placed on the connec-
tions between table frame and lifting column. Ideally, the
table design allows a certain freedom of movement.
The lifting columns are generally standing on heavy bases. These guarantee the stability of the
table. The connection between base and lifting column does not allow linear and rotational mo-
vements. Consequently, we can speak about a rigid connection, even if the bases are not inter-
connected. Ease of movement must therefore be created at the top connection to the table plate.
Owing to the control deviation, it must be possible to compensate for slight height differences by
table design. We therefore suggest that the connection between lifting column and table frame
is supported so that slight rotation is possible or that the table plate has the required flexibility.
Avoid countersunk screws for fastening the table frame. These are centred in the drilled holes
with solid bolts. If the drilling pattern in the table frame is not identical to that in the lifting co-
lumn, this leads to stresses or even destroys the threads. It is better if the drilled holes are
somewhat larger than the fixing bolts used. Inaccuracies in the drilling pattern can be compen-
sated in this way.
If the lifting columns are not exactly parallel, the top distance between the lifting columns can
change. This is why only one lifting column can be fixed (solid mount) and all others should have
a floating mount in the table plane (floating mount). This guarantees that stresses cannot arise
during motion.
The greater the distance between the lifting columns, the better the movement behaviour. If the
lifting columns are not tightly together, then control deviations have a greater effect. The table
plate is unsteady during movement. If the distance is greater, this effect reduces.
7. Life phases
Fixed
Floating
bearing
bearing
Rigid connection
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