MagneMotion MagneMover LITE, User Manual, Page: 86 / 382

Design Guidelines
Transport System Design
16 MagneMotion
Rockwell Automation Publication MMI-UM002E-EN-P - March 2016
Physical Length
The physical length, measured in millimeters, can be measured using a non-ferrous measuring
tool such as a ruler or measuring tape. The physical length can also be calculated, if the num-
ber of cycles is known.
The equation to calculate the physical length of a high flux magnet array is:
MagnetArrayLength = ( Cycles x 54.5) - 6.6 mm
Where:
MagnetArrayLength is the length of the array, in millimeters.
Cycles is the number of cycles in the array.
6.6 mm is the additional length of the cover.
Magnet Array Length and Attractive Force
There is no magnetic attractive force present between the magnet array and the MagneMover
LITE motor.
Magnet array length is measured in three ways:
• Number of cycles.
• Physical length in mm.
• Number of poles.
Number of Cycles
The amount of thrust force is reported as force per magnet array cycle. The more cycles in the
magnet array, the greater the thrust force. All MagneMover LITE magnet arrays are one cycle
long and have a cycle length of 54.5 mm as shown in
Figure 3-8 . A magnet array cycle is:
• The distance from the edge of a half North oriented magnet to the opposite edge of a
half North oriented magnet as shown in
Figure 3-8 .
• With a 1 cycle G3 magnet array, the maximum Motor Gap is 1.0 mm.
With a 1 cycle G4.2 and later magnet array, the maximum Motor Gap is 1.5 mm.
• Two magnet arrays may be used in a dual array configuration to increase the thrust
available (refer to
Dual Array (Tandem) Puck on page 3-19 ).
Number of Poles
The number of poles in a magnet array is simply the number of North and South oriented
poles in the magnet array. The number of poles will always be an odd number (see
Figure 3-8 )
as it includes the half magnets at each end of the array. The number of poles can also be calcu-
lated from the number of cycles (
cycles * 2 + 1).