Fagor DDS, Hardware Manual

Page: 335 / 386

   Connection diagrams
CON
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ECTION DIAGRAMS
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cal cabin
et. Dia
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DDS
HARDWARE
Ref.1310
Brake control
In some applications (e.g. the vertical Z axis on a milling machine) a elec-
tromechanical holding brake is used on the rotor of the motor.
Hence, the brake holds the rotor when loses voltage at its terminals. When
the machine is out of service, the brake locks up the vertical Z axis to keep
it from falling due to gravity.
Remember that
The control circuits of compact drives as well as RPS, XPS and PS-25B4
power supplies are powered at 24 V DC by an internal auxiliary power sup-
ply. PS-65A power supplies will need an external APS-24 auxiliary power
supply to power them because they do not have one integrated into them.
In compact drives and power supplies, the auxiliary power supply must be
powered at
single-phase 400-460 V AC. But not RPS power supplies; they
must be powered at three-phase 400-460 V AC.
Closing the main power switch - S1 must take two phases to connector X1
when using compact drives or an APS-24 as auxiliary power supply of the
PS-65A and to connector X3 when using XPS or PS-25B4 power supplies.
In the case of RPS power supplies, there are three phases instead of two
and they must go to connector X1.
Opening of contactor - KM1 does not remove the supply of power to the
auxiliary power supply in any case. But opening the main switch - S1 does
and the 24 V DC are maintained until the stop takes place.
WARNING. This brake must never be used to brake moving axes. It must
only be used to hold or lock vertical axes that have been stopped previous-
ly !
NOTE. The reaction time of a brake integrated into an axis feeding
FAGOR motor may vary between 7 ms and 97 ms depending on the mod-
el.
MANDATORY. While the brake is locking the vertical axis motor, the motor
must be kept with torque. See parameter GP9 in chapter 13 of the
“man_dds_soft.pdf” manual.
MANDATORY. When powering the machine up, the brake must never be
released until the system assumes control of that axis. See the TV100 vari-
able in chapter 13 of the “man_dds_soft.pdf” manual.
INFORMATION. It is necessary to install external protection fuses in the
power lines of the auxiliary power supply. They are internally integrated into
the main power supply.
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