MRA 2 - Motor belt drive
The MRA 2 replaces the complete QAP assembly. Servo motors set new standards. Every drive belt is controlled, adjusted and monitored separately via the central terminal.
The MRA 2 can be used for all circular knitting machines. Set-up takes just a tenth of the previous time.
- Closer adherence to stitch size, not otherwise possible with conventional processes
- Improved fabric quality due to uniform yarn inlet rate for all machine series
- Greater productivity with lower costs thanks to shorter set-up times
|Line voltage||3 x 400 V AC, other voltages possible with upstream step-down transformer|
|Line frequency||45 – 66 Hz|
|Power||250 VA per servo motor|
|Max. number of driven feeders||60 MPF units per belt / servo motor|
|24 MER units per belt / servo motor|
|Max. belt speed||360 m/min (with 30-tooth drive pulley)|
|500 m/min (with 40-tooth drive pulley)|
|576 m/min (with 48-tooth drive pulley)|
|Length of connecting cable between control unit and servo motor||1,8 m or 3,0 m|
Used to drive belts according to specified yarn feed rate.
Used to supply power to the max. 6 servo motors. Data from operation terminal and encoder are saved and transmitted to servo motors.
Ensure with a mains power failure that the system continues running until the machine comes to a complete standstill, so preventing yarn breakage.
Detects cylinder movements and transmits them to the control unit in the form of pulses.
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