Additive Machine Extruding Unit Motion for High-Speed Balancing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing movement devices for extruding units in additive production machines face issues such as imbalance, difficulty in assembly, bulkiness, and reduced precision at high operating speeds, particularly in systems like Hbot and CoreXY.
Innovation Solution
A device with a frame comprising guides along two perpendicular directions, using motor-driven units and a flexible element with idle pulleys, allowing for dynamic balancing and compact design, ensuring equilibrium of forces even at high speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If Hbot movement system is used, then compact design is achieved, but dynamic imbalance occurs reducing precision at high speeds
Solution Approach 1:
The patent applies asymmetry by positioning the two motor-driven units at different locations along the Y-axis (different Y coordinates) while maintaining symmetry in their X-Z positioning. This asymmetric configuration along the motion path creates dynamic balance by ensuring that centrifugal forces generated during acceleration and deceleration are equal and opposite, canceling each other out. This resolves the contradiction by maintaining compact Hbot geometry while achieving precision through force equilibrium.
Solution Approach 2:
The patent implements counterweight principles by designing the system so that one motor-driven unit acts as a counterbalance to the other. During motion, the forces generated by each unit are equal in magnitude but opposite in direction, creating a balanced system where harmful dynamic forces cancel out. This allows high-speed operation without compromising precision, resolving the contradiction between compact design and machining precision.
2Manufacturing precision
If CoreXY system is used, then dynamic balancing is improved, but assembly difficulty and bulkiness increase
Solution Approach 1:
The patent applies universality by using a single continuous flexible element that serves multiple functions: it transmits motion from both motor-driven units to the extruding unit while also providing dynamic balancing. This single element replaces the complex dual-belt system of CoreXY, reducing assembly complexity while maintaining dynamic balance. The flexible element is routed through multiple pulleys to achieve both motion transmission and force balancing in a unified structure.
Solution Approach 2:
The patent merges the motion transmission functions of two separate belts into a single continuous flexible element. This element is routed through multiple pulleys (including idle pulleys and motor-driven pulleys) to simultaneously achieve motion control and dynamic balancing. By combining these functions into one integrated system, the patent reduces assembly complexity while maintaining the dynamic balancing benefits, resolving the contradiction between precision and device complexity.
3Productivity
If high operating speeds are achieved, then productivity increases, but dynamic imbalance causes precision loss
Solution Approach 1:
The patent uses counterweight principles by configuring the two motor-driven units to generate equal and opposite forces during acceleration and deceleration. The asymmetric positioning along the Y-axis ensures that centrifugal forces are balanced, canceling out dynamic imbalances that would otherwise occur at high speeds. This enables high-speed operation while maintaining precision, resolving the contradiction between productivity and manufacturing precision.
Solution Approach 2:
The patent applies asymmetry in the positioning of motor-driven units along the motion path to create dynamic balance. By placing units at different Y-coordinates while maintaining symmetric X-Z positioning, the system generates balanced dynamic forces during high-speed operation. This asymmetric configuration allows the extruding unit to accelerate and decelerate rapidly without compromising precision, resolving the contradiction between operating speed and machining precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Achieves perfect dynamic balancing and excellent machining precision without vibrations or imprecision, enabling high-speed operation with reduced complexity and space requirements.
Implementation Method 1
The motion transmission means 3 comprise a flexible element 4 and a plurality of idle elements 5. According to an aspect of the invention, the idle means 5 comprise smooth and/or toothed pulleys.
Data Source
AI summary
A device for moving an extruding unit of an additive production machine includes a frame that includes at least a first guide positioned along a first direction (X) and a second guide positioned along a second direction (Y) perpendicular to the first direction (X); a body for supporting the extruding unit slidably constrained at least to the first guide of the frame; at least a first motor-driven unit, a second motor-driven unit, a third motor-riven unit, a fourth motor-driven unit or alternatively a fourth idle unit, and a way to transmit the motion of the motor-driven units to move the supporting body of the extruding unit with respect to the frame, and to move the first guide with respect to the second guide.