BRUSHLESS SERVOMOTORS - ATEX - OPERATING INSTRUCTIONS – 3010/21
2
NOTE ON EXPLOSION PROTECTION
•
When the installation is finished, IP test shall be
done. Closing the connector, use 1.8 Nm of
tightening torque.
•
If there are threaded hole in the motor housing,
use M5 screw according to ISO965-1, 6g
tolerance to connect external devices and to
complete the IP protection.
•
Cables or tubes connected to the motor must have
a thermal rating ≥ 90° C.
COUPLING WITH BELTS
Install the motor with the shaft perfectly parallel and aligned with the
pulley, to avoid axial thrusting on the supports.
The belt tension must be suitable to avoid sideways shifting during full
motor operation, while it must strictly not exceed the maximum
applicable load, stated in the technical catalogue. Excessive belt
tension can cause the bearings to wear quickly, and even break the
shaft.
Consult the belt supplier’s catalogue for peripheral belt speeds,
transmitted powers, ratios between pulley diameters etc. Always use
balanced pulleys.
NOTE ON EXPLOSION PROTECTION
If using belt pulleys/toothed belt pulleys use only belts
that cannot cause electrostatic charge.
PRESS-FITTING TRANSMISSION GEARS
Couplings, pinions etc. must always be pressed on according to
standard and using appropriate tools. It is strictly forbidden to use
hammers, to avoid damaging bearings and any accessories. Prior to
pressing on the transmission gear, use alcohol or specific solvent to
remove any rust-proof paint from the motor shaft and key (it is
important to avoid the solvent from leaking into the bearings).
Do not use emery cloth, scrapers or other to remove the paint. Grease
the end of the shaft and key before fitting the drive gear on and
performing assembly according to the manufacturer's instructions.
CLAMPING AND POSITIONING
Make sure the flange is attached correctly and that it adheres
correctly to the entire surface that it is fitted onto. Also check for
correct alignment in case of direct coupling.
Avoid resonance of the supporting base with rotation frequency. Turn
the rotor manually to ensure there are no anomalous noises. (see
"Vibrations during operation").
ALIGNMENT
If the motor is connected to the machine by a coupling, both axes
must be axially and radially aligned. Make sure the comparators are
securely fitted on. The measurements must be taken in four points, 90°
from each-other, turning both coupled parts simultaneously.
AXIAL OSCILLATION (FIG. 2)
The permanent margin for error must not exceed 0.03 mm, in relation
to a diameter of 200 mm.
RADIAL OSCILLATION (FIG. 3)
The remaining margin for error must not exceed 0.03 mm. The
adjustment of the axial distance between the two coupled halves («E»
dimension) must be carried out based on the manufacturer's
requirement for coupled drive gears.
Once again, make sure the machine is aligned with the
operating temperature.
COMBINED MEASUREMENT OF AXIAL AND RADIAL ALIGNMENT
(FIG. 4)
Figure 4 illustrates how to combine the two measurements in a
relatively easy way. The comparators are placed a flat iron seats,
screwed or locked in, eg. with captive screws.
Fig. 2
Fig. 3
Fig. 4
Fig. 2 Axial alignment
Fig. 3 Radial alignment
Fig. 4 Radial and axial alignment
The tolerances provided by the coupling manufacturer’s underlines
what the coupling can support, therefore, do not use these to assess
how accurate the alignment needs to be. When tolerance ranges are
too broad, this leads to vibration, causing damage to the bearing
and/or machine. It is therefore advisable to achieve the lowest
possible offsets.
The machine must be aligned with the utmost caution. Remember to
record all measurements, for future checks.
VIBRATIONS DURING OPERATION
Vibration levels V
eff
≤ 2.3 mm/s is not problematic for coupled
machines. If there are any anomalies in relation to normal operation,
such as high temperatures, anomalous noises or vibrations, check the
cause and, if necessary, contact the manufacturer.
Do not disable the safety devices, not even to perform
tests. In case of doubt, switch the machine off.
ELECTRICAL PARTS
INSULATION RESISTANCE
(See "Check before commissioning")
CONNECTION DIAGRAMS: POWER AND SIGNAL
Below are the standard types of electrical power and signal
connections.
POWER CONNECTOR