Rossi TX11 HB Series, Operating Instructions Manual

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TX11 Operating instructions − UTD.164.06-2012.00_IT_EN
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Rossi
mal steady condition.
For the design type identifi cation refer to the mark on cable con-
nected to auxiliary terminal block and to the relevant identifi cation
code stated on nameplate.
Connection of encoder
See specifi c instructions inside terminal box.
8. Periodical maintenance
8.1. Motor periodical mainenance
Periodically verify (according to environment and duty) and reset,
if necessary:
– motor cleaning (absence of oil, dirt and machining residuals) and
free passage of cooling air;
– correct tightening of electrical connections (see Tab. 1), of fasten-
ing screws and motor mechanical pairing;
– static and live tightening conditions;
– that motor run is free from vibrations (v
eff
3,5 mm/s for P
N
15 kW; v
eff
4,5 mm/s for P
N
> 15 kW), and anomalous noises;
in this case, verify motor fastening, paired machine balancing or
need for bearings replacement.
For motors with protection degree higher than IP55, machined mat-
ing surfaces on housing, endshields, covers, etc., before mount-
ing, must be covered with a proper not hardening adhesive or with
grease in order to assure motor tightening.
In case of brake motor also see points below 8.2, 8.3, 8.4.
By executing controls of electric absorption, keep in mind that
measured values are comprehensive of brake absorption (with
brake supply directly from terminal block).
8.2. HBZ Brake periodical maintenance
Verify, at regular intervals, that air-gap and backlash g (see Fig. 6)
of release lever pullers, if any, are included within values stated in
Tab. 3 (remove the wear dust of friction surface, if any).
Excessive air-gap value deriving from friction surface wear makes
brake noise level rise and could prevent its electric release.
Important: an air-gap greater than max value can produce a de-
crease down to 0 of the braking torque due to the clearance tak-
ing up of the release lever pullers ; g dimension in Fig. 6 must
match with the values stated in Tab. 3; a too high g value makes it
diffi cult or ineffi cient the use of the release hand lever.
Adjust the air-gap (see Fig. 6) by releasing the nuts 32 and by
screwing the fastening screws 25 (it is necessary to act through a
hole of the fl ywheel, if present) in order to reach minimum air-gap
(see Tab. 3) measuring by a thickness gauge in 3 positions at 120°
near the guiding bushes 28 . Tighten nuts 32 keeping in position
fastening screws 25 . Verify the obtained air-gap value.
If the brake is in a non-standard design with « ready air-gap reset »
design (code «,RF» on name plate) it is provided with removable
thin spacers placed under the brake fastening studs (see Fig. 8); in
this case, adjust air-gap simply removing one series of thin spacers
after having partially loosen (without disassembling) the brake fi x-
ing bolts 25 and without adjusting by thickness gauge. The brake
is supplied with two series of thin spacers of diff erent color (yellow
and red) to allow two adjustment operations.
After several adjustments of air-gap, verify that brake disk thickness
is not lower than the minimum value stated in Tab. 3; if necessary,
replace the brake disk (refer to Fig. 6).
Release lever rod is not to be left permanently installed (to avoid
dangerous or inappropriate use).
8.3. HBF Brake periodical maintenance
Verify, at regular intervals, that air-gap and backlash g (see Fig.
10) of release lever pullers, if any, are included within values stated
in Tab. 4 (remove the wear dust of friction surface, if any).
Excessive air-gap value makes brake noise level rise and could pre-
vent its electric release.
Important: an air-gap greater than max value can produce a de-
crease down to 0 of the braking torque due to the clearance tak-
ing up of the release lever pullers
.
g
dimension in Fig. 10 must
match with values stated in Tab. 4; a too high value of g makes it
diffi cult or ineffi cient the use of the release hand lever.
Motor sizes 160S : adjust the air-gap (see Fig. 10) by releas-
ing the nuts
32
and by screwing the fastening screws
25
in order
to reach minimum air-gap (see Tab. 4) measuring by a thickness
gauge in 3 positions at 120° near the guiding bushes 28 . Tighten
nuts 32 keeping in position fastening screws 25 . Verify the ob-
tained air-gap value.
Motor
sizes 160M
: adjust the air-gap (see fi g. 10a) by releasing
the nuts 45a and by screwing the nuts 45b to reach minimum air-
gap, measuring the adjustment by a thickness gauge in 3 positions
at 120° near the studs 25 . Tighten nuts 45a and verify again the
air-gap obtained.
After several air-gap adjustments, re-adjust braking torque and
verify that brake disk thickness is not lower than minimum value
stated in table 4; if necessary, replace the brake disk (refer to fi g.
10a).
When the hand lever for manual release does not run, after repeated
operations, re-adjust the backlash g according to the table values.
Release lever and screw 15 must not be left permanently installed
(to avoid dangerous or inappropriate use).
8.4. HBV (HBVM) Brake periodical maintenance
Verify, at regular intervals, that air-gap is included between values
stated in Tab. 5.
Excessive air-gap value could produce: decrease of braking torque
up to zero, rise of brake noise level, and even miss of electric re-
lease.
Adjust the
air-gap (see Fig. 11), even with the fan cover mount-
ed , acting on self-locking nut 48 considering that the pitch is: 1
mm for size 63, 1,25 mm for sizes 71 and 80, 1,5 mm for sizes
90 … 112, 1,75 mm for sizes 132 and 160S. Important : in case
of single-phase motor (HBVM), loosen the tightening dowel of fan
before adjusting.
After several adjustments of air-gap, verify that the thickness of fric-
tion surface is
not
lower than the
minimum
value stated in Tab. 5;
if necessary, replace the brake anchor (see Fig. 11).