Design and description
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01.00 | EGM | Assembly and Operating Manual | en | 389539
4.2 Description
The product is an electric permanent magnetic gripper for the
energy-efficient handling of ferromagnetic workpieces. The
workpieces are free from interfering contours allowing access
from five sides and are also held reliably in emergency stop
scenarios. Various sizes in monopolar and bipolar versions allow
operation with different workpieces.
The functional principle is based on the combination of AlNiCo and
neodymium magnets: in deactivated state, the magnetic flux of
the AlNiCo magnets passes through the neodymium magnets and
closes the magnetic circuit via the steel gripper base body. To
activate the system, an electric current pulse is conducted through
the coil. This reverses the polarity of the AlNiCo magnets so that
the magnetic circuit is closed by the ferromagnetic workpiece to
be gripped.
The product communicates with the higher-level control via an
ECG-type controller. If required, this can also simultaneously
actuate several products that are connected e. g. via a distributor
box. Depending on the holding force required, select one of the
following controller variants:
• EGM-C: Holding force constant
• EGM-R: Holding force selectable (8 holding force levels)
• EGM-W: Holding force constant, optimized for welding
applications
For sufficient holding force, the contact surface of the workpiece
must be large enough to cover both poles of the product. For
round workpieces, this can also be attained by using a pole
extension. The permissible load capacity must be adhered to,
Any residual magnetism remaining in the workpiece (remanence)
can be measured with an optionally available gaussmeter.
