ES721 ISO40 7 kW NL - HSD

HSD
The axial force exerted on the tool holder by the locking system is guaranteed
to be constant for a minimum of 2,000,000 tool changing cycles
1 Tool Changing Cycle = Tool Locked / Tool Released / Tool Locked
All HSD electrospindles have a mechanical reactionm system that neutralises the
axial force of the piston on the shaft during the tool changing phase, thus
guaranteeing the integrity of the precision bearings.
10.5 AUTOMATIC CLEANING OF THE SPINDLE SHAFT CONE HOUSING
The tapered housing of the spindle shaft must always be kept perfectly clean and free from dust,
grease, coolant, oil, metal particles, corrosion and scaling.
The compressed air system shown in section 9.10 automatically cleans the cone during tool
changes. This cleaning is not sufficient on its own, however. Regular cleaning must be performed
as instructed in chapter § 11 on maintenance.
10.6 PRESSURISING
Compressed air must be ISO 8573-1, classes 2 4 3 compliant ( see section 9.7 )
There are two pressurizing circuits inside the electrospindle. The purpose of these is to prevent dirt
from entering. Compressed air is distributed to two separate areas:
1. Front mechanical labyrinth: Compressed air is forced out through the ports in the spindle
nose area.
2. Tool cooling water distributor: Compressed air prevents water from entering the draw bar
and release cylinder area. Any water which does get through is drained out through drain holes
provided for the purpose.
10.7 PROXIMITY SENSORS
The electrospindle is fitted with three normally open (NO) and one normally closed (NC) PNP
proximity sensors:
� S1 : DRAW BAR SENSOR (TOOLHOLDER LOCKED)
� S2 : FORWARD PISTON SENSOR (TOOLHOLDER UNLOCKED)
� S3 (optional): SHAFT IDLE SENSOR
� S5 : BACKWARD PISTON SENSOR (PISTON IN SAFE CONDITION, AWAY FROM
ROTATING PARTS)
10.7.1 Specifications of proximity sensors
Supply voltage 10 � 30 V (DC)
Maximum load 200 mA
Current absorbed without load � 10 mA
Nominal reading distance 0,8 mm
i
The “ON” condition of the sensor corresponds to the output equal to the supply voltage;
the “OFF” condition corresponds to an output of 0V.
5801H0066 en Rev.01 28/48