Design consideration, Motor air gap, Bumpers, shock absorbers, or end stops – Rockwell Automation LDL Ironless Linear Servo Motors User Manual
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Publication LDL-UM001A-EN-P - March 2009
Chapter 2 Start
Design Consideration
The information provided here is critical to using linear motor 
components. Design your system to comply with the following points 
to run safe and successfully. 
Motor Air Gap
Maintaining the air gap is critical to proper installation and operation 
of the linear motor components. Use the coil, and magnet drawings in 
to calculate the installation envelope dimension. By
maintaining installation envelope dimension in your design the 
vertical air gap requirement will be met. The following diagram shows 
the critical dimensions.
Bumpers, Shock Absorbers, or End Stops
Always include in your design a mechanical stop at the ends of travel. 
Designed them such that they can prevent the moving mass from 
leaving its travel limits. Take into consideration the maximum speed 
and inertia of your moving mass when designing your mechanical 
Overall dimension
Magnet Channel
Coil