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4.4.6 Internal volumes of the pneumatic cylinders
Electrospindle model
Volume of the
pneumatic cylinder
ES919, 929, 915 ISO
0.14 litres (8.5 cu in)
ES919, 929, 915, HSK
0.19 litres (11.6 cu in)
ES884 HSK E63
0.12 litres (7,3 cu in)
ES888 HSK F63
0.23 litres (14 cu in)
ES988 ISO30 / HSK F63
0.23 litres (14 cu in)
4.4.7 Internal pressurisation
The pneumatic circuit of internal pressurisation prevents harmful particles from entering the
electrospindle. The air introduced finds an outlet through the gaps of the front labyrinth, in the area
of the electrospindle nose.
Pressurisation air must always be present, even when the electrospindle is stopped and
the machine switched on. It must also be present during machine maintenance and
cleaning operations, to prevent dust from getting inside.
With the spindle at standstill, check there is a uniform outlet of air around the spindle shaft
(pressurisation); if this is not the case, check the efficiency of the pneumatic circuit and the
tightness of the connections.
MODEL
CONSUMPTION
EQUIVALENT VOLUME
( 1 Atm - 20°C - 68°F )
ES915
12 l/min - 0.42 cfm ( 4 bar - 20°C - 68°F )
48 l/min - 1.7 cfm
ES919
12 l/min - 0.42 cfm ( 4 bar - 20°C - 68°F )
48 l/min - 1.7 cfm
ES988
12 l/min - 0.42 cfm ( 4 bar - 20°C - 68°F )
48 l/min - 1.7 cfm
ES939
14 l/min - 0.49 cfm
( 4 bar - 20°C - 68°F )
56 l/min - 2.0 cfm
ES884
11,5 l/min - 0.40 cfm ( 4 bar - 20°C - 68°F )
46 l/min - 1.6 cfm
ES888
11,5 l/min - 0.40 cfm ( 4 bar - 20°C - 68°F )
46 l/min - 1.6 cfm
4.4.8 Cleaning the tool-holder cone
The air jet for cleaning the cone is automatically activated during the tool change phase in those
spindles fitted with a single-acting piston.
For spindles with a double-acting piston, the operation is not automatic:
the customer must arrange for a solenoid valve that will open during the tool change phase, when
the output of sensor S2 is “ON” (see ref. 11 on page 75)
This procedure protects the coupling surfaces against deposits of contaminants.
The condition of the connecting surfaces and their degree of cleanliness must be checked at
regular intervals as described in section 7.
i
The jet of cleaning air must be active for the whole time that the collet is open.
