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Shear Unit, based on Servo-Motor System
The two shearing arms are horizontally opened and closed by a rack-and-pinion drive. The shearing blades, which cut the glass, are mounted onto the shearing arms. The shearing arms are vertically adjustable while the shearing blades are also horizontally adjustable. This allows to fine-tune the shearing process to its optimum, since the movement profile of the shearing arms and the shearing
cycle are controlled through the MMC-software�s graphic tool, which is precisely relayed to the shear
mechanism via the servo-motor system. Glass temperature reduction due to shear blade contact is
reduced to a minimum due to the very high shearing speed: glass to shear blade contact is around
50 msec.
Shear Unit, based on LINEAR Servo-Motor System
In order to increase the shearing precision (for extremely high quality requirements) and the capacity (cuts/min.), the linear movement of the shearing arms may also be carried out by two highly dynamic linear servo-motor systems. The shearing arms are mounted onto two slides, while two magnetic plates, which are installed underneath the slides, allow the shearing arms to follow the linear movement
of the magnetic field. The electro-magnetic linear motor and the positioning sensor are mounted
onto the watercooled static part of the slide. This reduces wear, since the media-supply (cooling water
and current) are no moving parts. Since the linear movement is based on electro-magnetism, mechanical
parts such as rack-and-pinion, spindles etc. are replaced � reducing the risk of any mechanical
backlash. The inertia moment of rotating parts as well as the risk of overshoot distortion of the shear
blades while shearing is thus also eliminated.
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