Hyd-Mech DM8 - Choice of Blade

MEP S.p.A.
9--2 Use and maintenance manual DM 8
Inverter technical specifications
Protection rating IP 31
Vibration and shock resist-
ance (EN50178)
0.6gnfrom10to50Hz
2gnfrom50to150Hz
Max. relative humidity 93% without condensation or drop--forming
Acceptable Temperature
Range (EN 50178)
For warehouse storing: from --25˚Cto+65˚C For operat-
ing purposes: from --10˚Cto+40˚C
Max. altitude 1000mt. with no derating
-- single phase: 200V -- 15% to 240V + 10%
Supply
-- three phase: 200V -- 15% to 230V + 10%
380V -- 15% to 460V + 10%
Frequency 50/60 Hz ¦ 5%
Output voltage Maximum voltage equal to t he supply voltage
Output frequency range 0.5 to 320 Hz
Max. transients 150% of electronic speed control rated current for 60 secs.
Frequency resolution
-- Display: 0.1 Hz
-- Analog inputs: 0.1 Hz per 100 Hz max.
Switching frequency Adjustable from 2.2 to 12 Hz max.
galvanic insulation between power and control panel
Electronic speed control
p
rotection and safet
y
de-
Short circuit protection:
-- of available internal supplies;
--between U--V--W output phases
between phase and earth for calibres from 5.5 to 15Kw
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vices
Therma l protection against overhe a ting and overcur re nts
Protection against mains supply undercurrent and overcur-
rent
Braking overloa d protection
Motor protections
Protection integrated in the electronic speed control with
1
2
t calculation
Choice of blade
When using band saws to cut metals, an important factor is the choice of pitch,
i.e. the number of teeth per inch (25.4 mm.), which must be s uitable for the
workpiece material. The following recommendations may be taken as general
guidelines:
- thin---walled materials, such as sheet steel, tubes and profiles require a fine
pitch frequency. 3 to 6 teeth should be engaged in the breadth of the material
at any one time;
- large section cutting requires a coarse pitch to cope with the higher volume of
swarf and optimal tooth penetration;
- soft materials (aluminium alloys, soft bronze etc.) also require a coarse tooth
pitch.