Modular Motion Frame Assembly for Orthogonal Axis Alignment
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Solution Overview
Problem
Existing additive manufacturing systems face challenges in achieving a rigid and precisely aligned multi-axis motion control system, particularly in large-scale machines where heavy components and off-axis forces can lead to misalignment and reduced positional integrity.
Innovation Solution
A modular frame assembly is introduced, comprising two or more subassemblies that can be separately assembled and aligned. Each subassembly has a reference interface surface, allowing for precise orientation of motion vectors when the subassemblies are mated. This design ensures orthogonality among the motion axes, facilitating interchangeability and ease of alignment during assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid frame is constructed using traditional struts and fasteners, then structural strength is improved, but manufacturing precision and alignment accuracy deteriorate due to part variation and lack of cross-bracing
Solution Approach 1:
The frame is divided into modular subassemblies (base subassembly, gantry subassembly, etc.) that can be independently manufactured and aligned. Each subassembly has standardized reference interface surfaces that ensure precise alignment when assembled, eliminating the need for complex cross-bracing while maintaining rigidity.
Solution Approach 2:
The design transitions from traditional bolted strut connections to a modular interface system with reference surfaces. This parameter change in the connection methodology enables precise alignment (within 0.002 inches) while maintaining structural strength through standardized mating surfaces and alignment features.
2Measurement precision
If motors precisely control motion along three orthogonal axes, then motion control precision is improved, but device complexity increases due to multiple actuators and alignment requirements
Solution Approach 1:
The reference interface surfaces serve multiple functions: they provide precise alignment references for orthogonal axes, act as mounting surfaces for actuators, and enable modular assembly. This multi-functionality reduces the number of separate alignment features needed, simplifying the overall system while maintaining precision.
Solution Approach 2:
Orthogonality is pre-established through the reference interface surfaces during subassembly manufacturing. This preliminary alignment action eliminates the need for complex field alignment procedures when assembling the complete system, reducing device complexity while ensuring motion control precision.
3Manufacturing precision
If the frame is designed as a fixed assembly, then manufacturing precision is improved, but adaptability for field replacements and upgrades deteriorates
Solution Approach 1:
The frame design transitions from a fixed, permanent assembly to a dynamic, reconfigurable modular system. Subassemblies can be disconnected and reconnected at the reference interface surfaces, allowing field replacements and upgrades while maintaining alignment precision through the standardized reference surfaces.
Solution Approach 2:
The system is segmented into replaceable subassemblies (base, gantry, etc.) that can be independently serviced. The reference interface surfaces ensure that when subassemblies are reassembled after field service, the original alignment precision is restored without requiring complex realignment procedures.
4Ease of operation
If alignment is performed using crude handheld squares or eyeball methods, then ease of operation is improved, but manufacturing precision deteriorates with angular play and misalignment
Solution Approach 1:
The reference interface surfaces are designed to self-align subassemblies during assembly. The precision ground surfaces and alignment features automatically guide the mating subassembly into the correct position, eliminating the need for operator skill with alignment tools while achieving high precision (0.002 inches) alignment accuracy.
Data Source
AI summary
In the context of multi-axis motion control systems, a modular frame is disclosed comprising two or more subassemblies that each comprise one or more motion actuators. Each subassembly comprises a reference interface surface along which the subassembly may be attached to that of an adjoining subassembly. Motion actuators of a first subassembly are aligned to a first reference interface surface so that motion vectors of the actuators come into precise alignment with the motion vectors of actuators on a second subassembly when the first subassembly and second subassembly are joined. In forming an additive manufacturing system, a material depositing component may be attached to the first subassembly and tested as a unit with the first subassembly before the second subassembly is made or becomes attached to the first subassembly.