Parker NV Serie Mise En Service Et Utilisation page 18

NV
2.4.2 Mechanical installation
The service life of the servomotor bearings depends largely on the care exercised during this
operation.
M
 
Fr K 10
R
The belt tension must never exceed the values specified by the manufacturer. Tension can be
determined with a device for measuring the natural belt frequency in deflection.
We cannot be held liable for any drive shaft fatigue ensuing from excessive strain on the shaft.

Where a servomotor is combined with gearbox, the gearbox must ensure the motor is
sealed against lubricant. If a IP 65 servomotor is associated with a gearbox which has
its own seal, you must remove the seal on the motorshaft.

If the gearbox is not provided by us, check the gearbox stresses (installation
conditions, drive shaft loads, etc.) are compatible with the servomotor selected.
Check the gearbox calculation and in particular its friction torque.

Check carefully the drive shaft alignment with that of the driven machine

in order to prevent vibration, irregular movement or too high loads on
the shaft.

Avoid any impact on the shaft, mountings or machining on the shaft
(holes, miling, etc.) which could destroy the bearings. If press mounting
is the only solution, the shaft must not turn while mounting.

Use the shaft end thread for fitting pulleys or accessories as in the
diagram. May rest against the shaft shoulder located in front of the
bearing. Where the front bearing is sealed by a lip seal that rubs on the
rotating part (IP 65 version), it is recommended to lubricate the seal for
extended service life.

Permissible (axial and radial) loads on the shaft are given in the
commercial documentation.

If the motor is driven by a timing belt, the drive pulley should be located
as close as possible to the flange. The pulley diameter should be such
that the radial force does not exceed the limits given in the catalogue.
The following formula provides a good approximation to the radial force
of the pulley:
Fr = radial force (N)
M = maximum torque during use (Nm)
R = pulley radius (mm)
K = 1.5 with a timing belt
3
K = 2.5 with a V belt
K = 3.5 with a flat belt
PVD 3535D – 01/2014
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