Dual Drive Tip Loading Mechanism for Lab Automation Pods
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Solution Overview
Problem
Lab automation workstations face challenges in efficiently and conveniently loading multiple pipette tips due to the requirement of applying a large amount of force, which can be cumbersome and inefficient, especially when using external tip loading stations that occupy space and increase processing times.
Innovation Solution
The integration of a dual drive system within the pod of the lab automation workstation, utilizing two drive screws symmetric about the Y-axis to generate the necessary tip-loading forces, allowing for offset or partial tip box loads and minimizing the need for oversized linear motion components, while maintaining the ability to handle high tip-loading forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a single drive system is used for tip loading, then the device complexity is reduced, but the tip-loading force is insufficient for simultaneous loading of multiple pipette tips
Solution Approach 1:
The drive system is segmented into two independent drive screws (first and second drive screws) that operate in parallel. Each drive screw independently contributes to the total tip-loading force, allowing the system to generate sufficient force for simultaneous loading of multiple pipette tips while maintaining modular complexity management
Solution Approach 2:
The first and second drive screws are combined in a parallel configuration where both drives work simultaneously to generate tip-loading force. This merging of multiple drive systems achieves the required force level that would be insufficient with a single drive, while the drives share the operational load
2Force
If external tip loading stations are used, then the tip-loading force is sufficient, but the workstation occupies more space and increases processing time
Solution Approach 1:
The tip-loading functionality is merged with the existing pod that performs pipetting operations. The first and second drive screws are integrated into the pod structure, combining tip loading and pipetting functions in a single integrated unit, thereby eliminating the need for separate external tip loading stations and reducing processing time
Solution Approach 2:
The pod is designed with multi-functionality, serving both as the pipetting execution unit and the tip-loading mechanism. The drive screws enable the pod to perform dual functions: loading pipette tips onto mandrels and executing pipetting operations, thereby eliminating the need for dedicated external tip loading equipment
3Force
If external tip loading stations are used, then the tip-loading force is sufficient, but the workstation occupies more space
Solution Approach 1:
The tip-loading mechanism is merged into the pod structure, integrating the first and second drive screws within the existing pod footprint. This consolidation eliminates the need for separate external tip loading stations, thereby reducing the total workstation space occupied while maintaining sufficient tip-loading force capability
Solution Approach 2:
The pod is designed as a multi-functional unit that combines pipetting operations and tip loading. By making the pod universal in its capabilities, the system eliminates dedicated external equipment for tip loading, thereby reducing the overall workstation footprint while maintaining the necessary force for simultaneous loading of multiple tips
4Measurement precision
If the first and second drive screws are independently controllable, then the positioning precision is improved, but the device complexity increases
Solution Approach 1:
Position sensors are implemented to provide feedback on the position of the platform relative to the first and second drive screws. This feedback mechanism enables precise positioning control by continuously monitoring and adjusting the platform position, achieving high positioning precision while the control system manages the complexity of coordinating two independent drives
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
This solution enables efficient and flexible pipette tip loading anywhere on the workstation deck, reducing shuffling of labware, freeing up space, and improving workflow efficiency by eliminating the need for external tip loading stations and allowing for precise control of tip-loading forces to ensure consistent and air-tight connections.
Implementation Method 1
a first drive screw; a second drive screw parallel to the first drive screw... activation of the first drive screw and the second drive screw displaces the platform
Data Source
AI summary
Embodiments of lab automation workstations are disclosed in which the pod that performs pipetting operations is integrated with pipette tip-loading functionality. To generate the necessary tip-loading force, a dual drive system is used that is symmetric about the Y-axis to allow for offset or partial tip box loads by dynamically centering the drive force (e.g., the tip-loading force) over the reaction load. This minimizes the need for oversized linear motion components while still allowing for the generation of high tip-loading forces needed to properly load a large number of pipette tips simultaneously.