Belt Installation; Safety Instructions; Safety Precautions - S&P FRC Serie Manual De Uso Y Mantenimiento

BELT INSTALLATION

The group of belts which make up the transmission (where appropriate) must be uniform, with the same nominal length (appropriate for the
type) and also the same code number (stamped on belt) which indicates the effective length. If this is not possible, ensure that the code number
difference is not greater than that recommended by the manufacturers (from 1 to 4 units, passing from smaller openings to larger ones). Ensure
that the pulleys are clean, removing any possible residue of oil, grease and oxide in the grooves. Bring the pulleys closer by turning the specific
screws of the motor support tightening base, until they can be mounted without forcing them. Never force the belts with a lever: this may break
the fibres of the internal structure.
Ensure that the belts and pulleys are properly aligned on all planes, that the axis are parallel, and there is sufficient space for the transmission.
Rotate the pulleys manually in such a way that all the belts have the loose part on the same side, up or down (figure 1), otherwise they will be
damaged during operation, becoming stuck in the grooves.
Move the pulleys away using the specific screws (anchors) positioned in the motor support tightening base.
Ensure that the belt tautness is ideal. In order to check that the belts have the correct tautness, follow the procedure described below:
- Measure the length of the free section L;
- Apply force F perpendicular to the free section in the middle, resulting in arrow f in the belt being equal to 1.6 mm by 100 mm of free section
length (figure 2);
- Compare the value of force F applied with the values shown in table 1.
Remember that:
- The ideal tautness is the lowest tautness at which the belt does not slip in conditions of maximum load.
- Excessive tautness reduces the useful life of the belts and the bearing.
- The belts should be free of any foreign bodies which may cause slipping.
- It is necessary to frequently check tautness during the first 24 to 48 hours of operation of the machine, and then regularly after that. The
transmission will return to low tension when there is slipping.

SAFETY INSTRUCTIONS

SAFETY PRECAUTIONS

All maintenance operations, whether ordinary or extraordinary, must be carried out with the fan switched off and with all the power supply
connections, whether electrical, pneumatic or any other, removed. Maintenance must be carried out by expert staff who have been duly trained,
respecting all current dispositions with regards to safety, in particular:
Parte lenta
Figure 1 - Loose part of the belts
Figure 2 - Control of belt tautness
TYPE OF MINOR
BELT PULLEY
DIAMETER
mm
SPZ 67-95
over 96
SPA 110-140
over 141
SPB 160-265
over 266
SPC 224-355
over 356
Table 1) Force values applied to the belts
Parte lenta
L
L
f
f
F
F
FORCE (N)
BELT SPEED BELT SPEED
0-10 m/s 0-10 m/s
12-18 10-16
19-26 17-24
22-32 18-26
33-48 27-40
38-56 32-50
57-72 41-64
72-102 60-90
103-132 91-120
BELT SPEED
0-10 m/s
8-14
15-22
15-22
23-34
28-42
43-58
50-80
81-110