GLOBAL S - User Manual
Counterbalancing the Weight of the Z-rail
A special pneumatic cylinder counterbalances the weight of the Z-rail and the elements connected to it (for
example, the head and tool). This cylinder is housed inside the Z-rail and is fixed to the top end of the frame
by means of a steel wire.
The cylinder generates a constant force capable of counterbalancing the weight of the Z-rail, irrespective of
the position reached by the Z-rail during its movement. The force that the counterbalancing cylinder applies
to the Z-rail is directly proportional to the pressure of the air inside it. For this reason, an automatic pressure
regulator maintains the pressure inside the cylinder at a constant value equal to that set on the drive
regulator.
The drive pressure can be regulated as a function of the weight of the Z-rail and the load applied to it, using
the regulating knob. The knob can be accessed by removing the right side guard of the secondary carriage
(Figure 31).
Figure 31 Z-rail Weight Counterbalancing System
1. Cylinder
2. Steel wire
3. Z-rail
4. Regulating knob –
05.yy.05, 07.yy.07 Models
5. Regulating knob -
09.yy.08, 12.yy.10, 15.yy.10 Models
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