Parallel Belt System for Laser Cutter Transport
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Solution Overview
Problem
Stainless steel vacuum belts in laser cutters require frequent maintenance, replacement, and cause defects like browning or yellow edges due to vacuum loss and clogging, leading to high operational costs and subpar cut quality.
Innovation Solution
A parallel belt system using rubber or urethane belts positioned parallel to each other, supported by guides, eliminates the need for stainless steel vacuum belts by aligning with cut sheet gutters and collecting cut portions without direct support, avoiding air gaps and defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stainless steel vacuum belts are used for cut sheet transport, then the cut sheets can be held in position for cutting, but the belts require repeated cleaning and replacement, increasing maintenance costs and operational downtime
Solution Approach 1:
The patent divides the transport system into multiple separate belts (first belt and second belt) that operate in parallel, each handling specific portions of the cut sheet. This segmentation allows individual belts to be cleaned or replaced independently, reducing overall maintenance downtime and costs while maintaining reliable vacuum hold down on each segment.
Solution Approach 2:
The patent uses a second belt that replicates the function of the first belt, creating a redundant system. This copying approach ensures that if one belt requires maintenance, the other can continue operating, and the second belt can be used to replace the first, eliminating the need for complete system shutdowns.
2Reliability
If stainless steel vacuum belts are used for cut sheet transport, then the belts can provide vacuum hold down, but the belts warp and clog, losing vacuum hold down and causing browned or yellow edges on cut sheets
Solution Approach 1:
The patent segments the vacuum transport function across multiple parallel belts, each responsible for specific gutters or portions of the cut sheet. This segmentation prevents any single belt from becoming overloaded or clogged, maintaining consistent vacuum hold down and preventing the warping and browning that occur when a single belt degrades.
Solution Approach 2:
The patent implements a dynamic maintenance approach where belts can be individually cleaned or replaced without shutting down the entire system. The controller coordinates vacuum activation and belt replacement dynamically, ensuring continuous operation while preventing the accumulation of debris that causes warping and browning.
3Productivity
If stainless steel vacuum belts are used for cut sheet transport, then the cut sheets can be transported through the laser cutter, but the belts need regular replacement at high cost
Solution Approach 1:
The patent divides the transport system into multiple independent belts, allowing parallel operation and independent maintenance. This segmentation enables continuous productivity as belts can be replaced individually during operation, eliminating costly complete shutdowns and reducing overall replacement costs through distributed wear.
Solution Approach 2:
The patent implements a belt replacement strategy where worn belts are discarded and replaced with new ones during operation, while the system continues running on remaining functional belts. The controller manages vacuum activation and belt replacement timing to minimize disruption to cut sheet transport productivity.
Data Source
AI summary
A parallel belt system for a laser cutter module and a method or non-transitory computer readable medium for transporting a cut sheet of media through a laser cutter in a printer is disclosed. For example, the parallel belt system includes a rotating shaft, a plurality of pairs of o-rings movably coupled to the rotating shaft, a plurality of belts for receiving a cut sheet of media, a guide for each one of the plurality of belts for holding a respective one of the plurality of belts rigid, a laser cutter for cutting a portion of the cut sheet of media and a collection module coupled below the plurality of belts for collecting the portion of the cut sheet of media that is cut by the laser cutter.