Printer Carriage Alignment Guide with Elastomeric Rolling Elements
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Solution Overview
Problem
Existing printing and scanning systems face challenges in maintaining precise alignment and reducing noise during the movement of carriages, particularly in wide-format printing and multifunction printers, due to imperfections in guide surfaces and lack of effective shock absorption.
Innovation Solution
The carriage system incorporates an L-shaped or U-shaped alignment guide with angled flat surfaces and elastomeric rolling elements to maintain alignment and absorb shocks, combined with a drive mechanism using a motor and flexible belt for smooth movement, and a tensioning system to ensure balanced forces on the belt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional guide mechanisms are used for carriage movement, then the structure is simple, but alignment precision deteriorates due to surface imperfections and noise
Solution Approach 1:
The guide mechanism is segmented into multiple functional surfaces: a first flat surface for primary alignment, a second flat surface at an angle for secondary alignment, and a curved surface for shock absorption. This segmentation allows each surface to perform a specific function, collectively achieving high alignment precision while managing complexity through modular design
Solution Approach 2:
The curved surface is specifically designed to absorb shocks and vibrations before they can affect the carriage alignment. By providing this cushioning element in advance within the guide mechanism, the system compensates for surface imperfections and mechanical shocks, maintaining alignment precision without requiring overly complex active compensation systems
2Object-affected harmful factors
If rigid guide surfaces are used, then manufacturing is easier, but noise increases and shock absorption deteriorates
Solution Approach 1:
Different regions of the guide mechanism have different surface qualities optimized for their specific functions: flat surfaces with high precision for alignment (manufactured with careful attention to flatness), and a curved surface with different geometry for shock absorption. This local differentiation allows each surface to be manufactured for its specific purpose, balancing ease of manufacture with noise reduction and shock absorption performance
Solution Approach 2:
The curved surface acts as a pre-designed shock absorption element that cushions impacts and vibrations before they propagate through the system. This beforehand cushioning reduces noise and harmful vibrations without requiring complex active damping systems, maintaining ease of manufacture while addressing harmful factors
3Productivity
If the carriage moves quickly, then productivity increases, but alignment precision deteriorates due to increased sensitivity to guide imperfections
Solution Approach 1:
The guide mechanism is divided into multiple functional surfaces that work together to maintain alignment at high speeds: flat surfaces provide stable reference planes for positioning, while the curved surface provides dynamic shock absorption. This segmentation allows the system to maintain precision during rapid movement by distributing alignment functions across multiple specialized surfaces
Solution Approach 2:
The curved surface provides continuous shock absorption and vibration damping that is particularly important at high speeds. By cushioning impacts and vibrations beforehand, the system maintains alignment precision even during rapid carriage movement, enabling high productivity without sacrificing 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
This configuration ensures precise alignment and reduced noise during printing and scanning operations by maintaining accurate carriage movement and absorbing surface imperfections, enhancing the overall performance and reliability of the printing and scanning systems.
Implementation Method 1
a first rolling element to cooperate with a first flat surface... a second rolling element to cooperate with a second flat surface... elastomeric rolling elements to maintain alignment and absorb shocks
Data Source
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AI summary
It is disclosed a carriage, e.g., for a printing system comprising a housing being the carriage to move relative to a carriage beam along a scan direction, the carriage comprising: a drive mechanism to move the carriage; and an alignment guide; wherein the alignment guide is parallel to the carriage beam and comprises a first flat surface and a second flat surface and wherein the carriage comprises a plurality of rolling elements including a first rolling element and a second rolling element being the first rolling element to contact the first flat surface and the second rolling element to contact the second flat surface.