Ewellix CPMA Series, Инструкция по установке, эксплуатации и обслуживанию

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4.0 Structure a n d fun ctio n
c1, c2, c3 Areas for force distribution
4.2 Brief description
A description of their function enables better understanding
of what telescopic pillars CPMA and CPMB and their individ-
ual parts do.
Functional principles
The functional principle of the telescopic pillars CPMA and
CPMB is based on a pushing force for the movement of cen-
tric and eccentric loads. The telescopic pillars CPMA and
CPMB have an integrated control unit and power supply
which is used as an individual lifting pillar.
A DC motor drives a lead screw via a bevel gear. A spindle
nut, which is attached to the push tube, moves up and down
on the lead screw. The telescopic tubes extend and retract
depending on the direction of the motor. The built-in brake
decelerates the movement or holds the position at a
standstill.
The telescopic pillars CPMA and CPMB for 100–240 V AC
are equipped with AC mains connection, and the mains volt-
age is internally transformed to 24 V DC. The telescopic pil-
lars CPMA and CPMB for 24 V DC are equipped with DC
connection and the voltage is internally transferred to the
control unit.
Control unit
The DC motor is driven via an integrated control unit. The
control unit controls the running direction of the telescopic
pillar and is equipped with an encoder for position detection.
During the acceleration or deceleration phase, the telescopic
pillars CPMA and CPMB use a soft start and soft stop func-
tion, which allows smooth running without jerking motion.
This function is automatically activated when buttons on the
operating device are pressed or released, or when the end
position is reached.
End position
The stroke is limited by the integrated control unit. If the tele-
scopic pillars CPMA and CPMB move beyond the end posi-
tion (in the case of a malfunction), after 3 mm a mechanical
block stops the movement. The control unit interrupts the
movement and the CPMA and CPMB can no longer be
moved in the blocking direction.
Outer tube base plate (a1)
The outer tube base plate has four connection nuts (b1) for
the fastening screws M6. Its purpose is to fasten the pillar to
one side of the application. The outer tube base plate must
be attached permanently with fastening screws M6 to a flat
metal surface in the application, which has to support the
areas of force distribution (c1, c2, c3).
Outer tube (a2)
The outer tube is the tube with larger outside dimensions.
The outer tube can be located in upper or lower position of
telescopic pillars CPMA and CPMB.
Outer tube rim cover (a3)
The purpose of the rim cover for the outer and inner tube is
to protect the tubes’ guiding system from dust and to pre-
vent the ingress of foreign matter according to IP20. It must
not be removed under any circumstances.
Inner tube (a5)
The inner tube is the tube with smaller outside dimensions.
The inner tube can be located in upper or lower position of
telescopic pillars CPMA and CPMB.
Inner tube base plate (a7)
The inner tube base plate has four connection nuts (b1) for
the fastening screws M6. Its purpose is to fasten the pillar to
the other side of the application. The inner tube base plate
must be attached permanently with fastening screws M6 to
a flat metal surface in the application, which has to support
the areas of force distribution (c1, c2, c3).
4.3 Special features
Guide tube unit (a2, a4)
The guide tube unit is made up of the outer tube (a2) and the
inner tube (a4), and its purpose is to carry centric and ec-
centric loads.
Drive unit
The permanent magnet motor is a 24 V DC motor and drives
the lead screw via the bevel gear. The speed of the move-
ment depends on the load and the direction of the move-
ment. The motor location can be selected on the inner tube
base plate or the outer tube base plate.
c1
c1
c3
c2