Tiger 370 CNC--MR, Руководство по эксплуатации и обслуживанию

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MEP S.p.A.
9--2 146
Use and maintenance manual TIGER 370 CNC--MR
Inverter technical specifications
Electronic speed control
protection and safety de-
vices
Motor protections
Motor protections
G
alvanic insulation between power and control panel
Short circuit protection:
-- of available internal supplies;
--between U--V--W output phases
between phase and earth for calibres from 5.5 to 15Kw
Thermal protection against overheating and overcurrents
Protection integrated in the electronic speed control
with 1
2
t calculation
Protection integrated in the electronic speed control
with 1
2
t calculation
Motor protections Protection integrated in the electronic speed control
with 1
2
t calculation
Choice of blade
The different types of blade that can be used for the TIGER 370 CNC---MR must
in any case respect the following general characteristics:
H
“Fine tooth pitch”: for thin wall materials such as sheet steel, tubes and profiles;
H
“Coarse tooth pitch”: for large cross--sections; for soft materials (aluminium alloys
and soft alloys in general).
Tooth pitch
The choice of the most suitable tooth pitch depends on various factors:
H
the size of the section;
H
the hardness of the material;
H
wall thickness.
Solid sections call for discs with a coarse tooth pitch, while small cross---sections
require blades with finer teeth. This is because when cutting walls of small
cross---section (1÷7 mm) profiles, it is important that the number of teeth
actually making the cut should not be too small, otherwise the effect obtained will
be one of tearing rather than of swarf removal, leading to a large increase in
shearing stress. On the other hand, when cutting thick materials or solid sections
using an excessively fine tooth pitch, the swarf collects as a spiral inside the gullet,
and since fine tooth pitches have small gullets, the accumulated swarf will exceed
the gullet capacity and press against the walls of the workpieces, resulting in poor
cutting (same situation with soft materials), greater shearing stress and hence
breakage of the blade.
Choice of tooth pitch T as a function of cross---section to be cut for light alloy solid pieces and profiles
S
S
sp
S in mm Pitch T S and sp in mm Pitch T
10 4 10 sp = 0,5 3
30 6 30 sp = 1,5 4 --- 5
50 8 50 sp = 2,5 5 --- 6
70 10 70 sp = 3,5 6---7
90 12 90 sp = 4,5 7 --- 8
130 16 130 sp = 6,5 8
KEY:
S = diameter or width of the solid piece to be cut in mm;
sp = thickness of the wall to be cut in mm;