Servo-Driven Cylinder Screen Printing Machine Backlash Elimination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional screen printing machines face synchronization accuracy issues due to mechanical gear-driven systems, leading to printing inaccuracy and increased complexity, with existing servo-driven systems still unable to achieve precise synchronization and independent control of the screen carrier relative to the print cylinder.
Innovation Solution
A servo-driven cylinder screen printing machine utilizing multiple independent driving devices, including direct-drive servo mechanisms for the print cylinder and linear servo mechanisms for the screen carrier, eliminating the need for tooth racks and gears, allowing for precise control and synchronization without backlash.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If mechanical gear-driven systems are used to drive the screen carrier and print cylinder, then the machine structure can be simplified, but synchronization accuracy deteriorates due to gear backlash and mesh changes
Solution Approach 1:
The patent replaces the mechanical gear-driven system with a servo motor system that uses electronic control to drive the screen carrier and print cylinder. This substitution eliminates gear backlash and mesh changes, achieving high synchronization accuracy while maintaining structural simplicity through direct electronic control mechanisms.
2Adaptability or versatility
If conventional servo-driven systems with gears are used, then independent control is achieved, but printing accuracy deteriorates due to tooth backlash
Solution Approach 1:
The patent eliminates the gear mechanism from the servo-driven system and uses direct drive mechanisms with encoder feedback. This replacement removes tooth backlash entirely while preserving independent control capability, enabling printing accuracy of ±0.03mm across the full speed range.
3Ease of operation
If multiple sets of gears, tooth racks, cams and chains are used, then driving functions can be achieved, but assembly complexity and tolerance accumulation increase
Solution Approach 1:
The patent extracts and removes the complex gear, tooth rack, cam, and chain mechanisms from the driving system. By using direct-drive servo motors with encoder feedback, the system achieves all necessary driving functions with minimal components, dramatically reducing assembly complexity and eliminating tolerance accumulation from multiple mechanical links.
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 enhances printing accuracy, simplifies the machine design, and enables independent control of the screen carrier, reducing assembly time and tolerance, while automatically correcting deviations in the printing process, resulting in improved productivity and reduced mechanical interference.
Implementation Method 1
a first driving source 10 for driving a feeder 101, an infeed table 102 and a side alignment device 103; a second driving source 11 for driving a print cylinder 111 and a rotary shaft 112
Implementation Method 2
the print cylinder 111 and the screen carrier 121 are connected to two mutually independent driving devices
Data Source
AI summary
A servo-driven cylinder screen printing machine includes a machine frame, a print cylinder, a direct-drive servo mechanism, a screen carrier and at least one linear servo mechanism. An infeed table and a delivery table are mounted in the machine frame at a front and a rear portion thereof, respectively, and the print cylinder is located between the infeed table and the delivery table. The direct-drive servo mechanism forms a direct-drive device connected to and driving a rotary shaft of the print cylinder to rotate at precisely controlled speed. The screen carrier is located above the machine frame and adjacent to a surface of the print cylinder. The linear servo mechanism forms another direct-drive device connected to and driving the screen carrier to linearly move reciprocatingly at precisely controller speed. Therefore, gears, tooth racks and cams are saved to avoid printing inaccuracy caused by noise and backlash in tooth drive.