
B-65222EN/03 CONFIGURATIONS AND SELECTION 1.SYSTEM CONFIGURATION
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Combination of parallel and serial arrangements
Three or more linear motors can be arranged using the method of
combining parallel and serial arrangements. The following figure
shows an example of arranging four linear motors using this method:
Magnet plate track #1
Movable table
Coil slider #1
Coil slider #3
Magnet plate track #2
Coil slider #2
Coil slider #4
Symmetrical arrangement
The FANUC Linear Motor series has the magnet attraction about
three times as strong as the maximum force. The magnetic attraction
always acts between the coil slider and magnet plate. For example, for
the 6000B/4, a force of about 1.8 tons always acts. The magnetic
attraction cannot be ignored for machine design which aims at
lightness and rigidity in many cases. The symmetrical arrangement
cancels out the magnetic attraction. There are two typical symmetrical
arrangement methods.
Magnet plate track #1
Machine base
Coil slider #1
Coil slider #2
Magnet plate track #2
The side view of a motor arrangement is shown above. This is an
example of arranging magnet plates back to back.
Magnet plate track #1
Machine base
Coil slider #1
Coil slider #2
Magnet plate track #2
Machine base
This is an example of arranging coil sliders back to back. With either
method, the magnetic attraction can be canceled out. Either
symmetrical arrangement can be combined with the parallel
arrangement and serial arrangement introduced above.