3
Description
function
The hollow shaft encoder detects and measures machine
movements and rotation, translates this measurement
into a signal and then sends the signal to the control unit
where it is used to control the MRA 2 motor. The GT3
console is used to precision set the yarn feed rate for
each individual belt. The yarn feed rate for fabric press-off
rectification can be reduced by programming. The MRA
2 motors can run in both directions. This means that the
feeder for S and Z yarns can be run with left-handed or
right-handed direction of rotation.
In the event of a mains power failure, capacitor batteries
will continue to power the system until the machine has
come to a complete standstill. If a fault occurs during an
operating cycle, the machine will be powered down; it will
not be possible to restart the machine.
MRA 2 motors can be exchanged when required without
the need for any reprogramming.
Components
MrA 2 motor:
The MRA 2 motors receive control signals
from the control unit and drive the toothed belts at the
speed for the set yarn feed rate. In order to handle speed
changes, manual operation and starting and stopping,
the motor incorporates advanced control technology. The
MRA 2 motor incorporates a frequency converter which
converts line current into three-phase alternating current
with variable frequency. No additional electrical cabinet is
required because the converter is already incorporated
in the motor.
GT3 console
: The GT3 console is used to enter all the
parameters needed to install and operate the system.
Control unit:
The control unit is powered from the mains
power supply at 3 x 400 V AC. It can power up to six MRA
2 motors. It stores operating parameters and distributes
information from the GT3 console and the hollow shaft
encoder. The GT3 console is used to enter the yarn
feed rate and displays the information about machine
movements received from the hollow shaft encoder. This
information is processed by the control unit and then
transmitted to the MRA 2 motors.
Hollow shaft encoder:
The hollow shaft encoder is
installed on the drive shaft and is connected via a gear
box to the machine cylinder. The hollow shaft encoder
detects cylinder movements, translates these into pulses
and transmits the pulses to the control unit.
Capacitor batteries:
In the event of a mains power failure,
the batteries ensure that the system continues running
until the machine has come to a complete standstill; this
prevents yarn breakage.
unit components
1 - MRA 2 motors
2 - GT3 console
3 - Control unit
4 - Hollow shaft encoder
5 - Capacitor batteries
4
3
2
5
1
