Rockwell Automation 700-1384-01, Руководство пользователя, Страница: 72 / 344

Design Guidelines
Transport System Design
72 MagneMotion
Rockwell Automation Publication MMI-UM007F-EN-P - September 2020
Cogging can be minimized by the following methods:
• Placing QuickStick HT motors at the optimal pitch on the transport system (see Down-
stream Gap ).
• Maximizing the Vehicle Gap between the motor and the magnet array.
• Providing external damping between the vehicle and the payload.
Motors on a Curve
For motors on a curve, the distance from the center of the motor housing on one motor to the
center of the housing on the next (downstream) motor is the Motor Gap. As with motors
installed in a line, the Downstream Gap is calculated from the internal spaces in the motors
and the Motor Gap (Internal space at end of motor + Motor Gap + internal space at start of
motor).
Figure 3-10: Motors on Curves
Since the motors and the magnet arrays are not curved, the alignment of the magnet array over
the motors is not optimal in a curve. Also, the alignment of the magnet array changes as the
vehicle moves through the curve (see
Figure 3-32 ). To minimize some of this misalignment,
the magnet arrays that are used for curve geometry are wider than usual to provide more mag-
netic array coverage. A dual array vehicle (see
Dual Array Vehicle on page 109 ) or a dou-
ble-wide motor (see 1/2 Meter Double-wide Motor on page 126 ) can be used, which allows
the magnet arrays to stay better aligned to the motors.
Additionally, when a motor is on a curve, the On Curve option for that motor in the Node
Controller Configuration File may need to be selected. The On Curve option is used based on
the configuration of the motors in the curve to enable the use of a correction table (supplied by
MagneMotion) to locate the vehicle correctly relative to the position sensors in the motors.
This is more commonly required for tight radius curves or single array vehicles (see the
QuickStick Configurator User Manual , MMI-UM009 ).
NOTE: If On Curve is selected for a motor and MagneMotion has not supplied a unique
version of software with the correction table, the vehicles may not move properly
and the system will not perform as expected.
Motor Gap
Motor
CL
CL
QuickStick HT Motor
(top view)
Internal Space
Downstream
Gap
Internal Space