Autoloader Axis Stall Detection for Glass Slide Protection
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Solution Overview
Problem
Glass slides in digital pathology apparatuses are prone to damage or breakage due to improper positioning and collision during transit between processing stations, necessitating a system to prevent such damage.
Innovation Solution
A stall detection system that monitors load resistance values during slide movement, comparing them to predetermined thresholds to prevent excessive force application, and includes recovery routines to avoid slide damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated motion control is implemented for glass slide transport, then productivity is improved, but glass slides are prone to damage or breakage due to improper positioning and collision
Solution Approach 1:
The system performs preliminary actions by continuously monitoring load resistance values during slide transport and comparing them to predetermined thresholds. When a threshold is exceeded, the system takes preventive action by stopping motion before critical errors occur, thereby avoiding glass slide damage while maintaining automated throughput.
Solution Approach 2:
The system implements feedback control by monitoring load resistance values during slide movement and using this information to control motor operation. The feedback loop compares actual load resistance to predetermined thresholds and adjusts motor operation accordingly, preventing damage while maintaining productivity.
2Reliability
If stall detection monitoring is added to prevent glass slide damage, then reliability is improved, but device complexity increases
Solution Approach 1:
The system uses the motor's own load resistance feedback as the monitoring mechanism, eliminating the need for separate sensors or detection devices. The motor controller utilizes existing feedback signals to detect stalls and prevent damage, improving reliability without adding significant complexity.
Solution Approach 2:
The motor controller performs multiple functions: it drives the motor for automated transport and simultaneously monitors load resistance for stall detection. This multi-functionality allows the system to improve reliability through stall detection without adding separate dedicated monitoring hardware.
Data Source
AI summary
A stall detection system is provided that determines if a glass slide in motion during an automated process is at risk for being damaged and stops motion in the event of an unacceptable risk of damage. The system includes one or more motors configured to move a glass slide (directly or indirectly). The motors are configured to generate a load resistance value. The system includes one or more processors that monitor the load resistance value of a motor during motion and compares the load resistance value to a predetermined threshold resistance value to determine the risk of a glass slide being damaged. The predetermined threshold resistance value may correspond to a risk of slide breakage in response to a force applied to any surface of the slide, or a risk of losing a controlling grip on a slide rack, or a risk of a motor skipping a motor step.