Holding Brake; Fan For Akm7 - Kollmorgen AKM Series Instruction Manual

Kollmorgen
12.4

Holding brake

All motors are optionally available with a holding brake. A spring applied brake (24V DC)
is integrated into the motors. When this brake is de-energized it blocks the rotor.
If there is a suspended load (vertical axes), the motor's holding brake is
released, and, at the same time, the servo drive does not produce any
output, the load may fall down!
Risk of injury for the personnel operating the machine. Functional safety
in case of hanging loads (vertical axes) can be ensured only by using an
additional, external, mechanical brake.
The holding brakes are designed as standstill brakes and are not suited for repeated ope-
rational braking. In the case of frequent, operational braking, premature wear and failure
of the holding brake is to be expected.
The motor length increases when a holding brake is mounted.
The holding brake can be controlled directly by the servo amplifier (no personal safety !),
the winding is suppressed in the servo amplifier — additional circuitry is not required (see
instructions manual of the servo amplifier).
If the holding brake is not controlled directly by the servo amplifier, an additional wiring
(e.g. varistor) is required. Consult our support department.
12.5

Fan for AKM7

For the AKM7 model size, an add-on kit for forced ventilation is available. The integrated
fan enables up to 30% more power output for the AKM7 motors. Assembly instructions for
the fan kit is contained within the scope of delivery of the add-on kit.
Make sure, that free air flow is available for the fan. Keep a space of at least 25 mm
behind the fan guard.
The motors become dirty considerably faster due to forced convection. Dirt deposits lead
to falling cooling capacity and can put the motors at risk. Dust may burn in case of over-
heating.So clean the air duct, the fan, and the motor at regular intervals.
By adding a fan, the mounting dimensions of AKM7 motors increase.
You can find technical information on AKM7 motors with fans on page 115.
You can find the dimensional drawing for AKM7 motors with fans on page 125.
Servomotors AKM
04/2013
The fan housing can be mounted either with both
the supplied brackets and spacers or with the bra-
ckets only. The choice of mounting method
depends on the application. If strong vibrations are
expected, you should use both brackets and spa-
cers. Motors with integrated brakes require the
longs spacers.
Technical Description
English - 45