Behind ±0.01mm Repositioning Accuracy: Technical Analysis of RYK Semi-Closed Ball Screw Linear Module 01 Interpretation of Accuracy Index: What Does ±0.01mm Stand For? Repositioning accuracy ranks among the core indicators of linear module parameters, directly determining

the stable and reliable execution of precision automated operations. Distinction of Accuracy Concepts Three easily confused accuracy definitions are clarified below: | Accuracy Type | Definition | Plain Explanation | | Resolution | Minimum movable step of the system | The smallest movable unit | | Positioning Accuracy | Deviation between commanded position and actual arrival position | Shooting accuracy toward the target | | Repositioning Accuracy | Deviation range of repeated positioning at the same spot | Consistency of parking position | Measurement standard: Position at a single point 7 times in the identical direction, record stop positions, calculate half of the maximum

reading difference and mark with ± symbol.

Analogy: Positioning accuracy equals hitting the bullseye, while repositioning accuracy means concentrated bullet holes.

Repositioning accuracy carries greater practical significance; positioning deviation can be compensated via system adjustment as

long as positioning repeatability stays stable. Industrial Accuracy Classification | Accuracy Grade | Repositioning Accuracy | Typical Application | | Standard Grade | ±0.05mm ~ ±0.10mm | Material handling, basic positioning | | Medium-High Grade | ±0.01mm ~ ±0.02mm | Precision assembly, dispensing, inspection | | Premium Grade | ±0.002mm ~ ±0.005mm | Semiconductor manufacturing, ultra-precision machining | RYK semi-closed ball screw linear module achieves ±0.01mm repositioning accuracy,

falling into medium-high industrial grade. It perfectly meets stringent requirements of camera module assembly,

precision dispensing and focusing inspection.

02 Six Core Technologies Ensuring Superior Accuracy The outstanding ±0.01mm repositioning accuracy is realized via systematic coordination of materials, components,

structure and processing techniques. | Technical Dimension | RYK Technical Solution | Accuracy Contribution | | Body Material | High-strength Al-Mg alloy with aging treatment | Long-term stability, elimination of internal stress deformation | | Core Components | Taiwan-made ball screw and linear guide | Low friction, high rigidity, solid transmission foundation | | Structural Design | Integrated motor base and main support | Guaranteed concentricity of screw and motor | | Machining Process | One-piece integral machining without tool joint | Base straightness and parallelism up to 0.02mm | | Assembly Standard | Japanese precision assembly specifications | Collaborative operational precision of all parts | | Quality Control | 7-cycle repositioning accuracy test | Strict factory accuracy certification | 1. High-strength Aluminum-Magnesium Alloy Body Adopting high-hardness Al-Mg alloy material processed by aging treatment,

internal stress is fully released to avoid machining and operational deformation,

laying a solid foundation for stable linear precision. 2. Premium Taiwan-made Core Components Equipped with high-grade ball screw and linear guide imported from Taiwan. Screw diameter: 16mm, customizable lead available Guide size: 15×12.5mm single rail layout Low friction and high precision of original components ensure smooth linear motion and reliable positioning performance.

Accuracy tests are conducted at middle and two end travel positions to verify stable operational performance.

Every finished module passes strict inspection to reach standard ±0.01mm repositioning accuracy. 03 Common Accuracy Risks & RYK Optimized Solutions Improper installation and operation will cause accuracy loss. Targeted designs effectively avoid common industrial defects: | Risk Factor | Problem Description | RYK Countermeasure | | Insufficient mounting flatness | Base deformation and accuracy decline | Reinforced body & integral machining, strong flatness tolerance | | Improper screw preload | Backlash-induced positioning error | Factory preset matched preload for diverse working scenarios | | Low coupling rigidity | Distortion and accuracy loss during start-stop | Integrated structure reducing connecting parts | | Unreasonable fixing mode | Axial flexibility and elastic displacement | Rigid fixation & optimized support structure | 04 Performance Comparison with Overseas Premium Brands | Comparison Item | RYK Semi-Closed Module | Mainstream Japanese Module | Comparison Result | | Repositioning Accuracy | ±0.01mm | ±0.01mm | Equal precision level | | Maximum Stroke | ≤1800mm | ≤1000mm | Longer applicable stroke | | Maximum Speed | ≤500mm/s | ≤500mm/s | Identical operating speed | | Body Material | High-strength Al-Mg Alloy | Aluminum Alloy | Equivalent material durability | | Core Parts | Taiwan Original Parts | Japanese Self-produced Parts | Same quality grade | | Price | Competitive | 1.5-2 times higher | RYK presents remarkable cost performance | | Delivery Cycle | Standard stock, customized order: 5-7 days | 3-4 weeks | RYK delivers products much faster | 05 Practical Application Value: Elevate Production Yield Micro-level accuracy converts into tangible manufacturing benefits. - Camera Module Dispensing: Consistent positioning ensures uniform glue distribution on lens surfaces - Lens Bonding: Micron-level positioning stability supports 99.9% assembly yield - Focus Inspection: Precise probe positioning guarantees credible detection data 06 Higher Precision Upgrade Solution: Linear Motor Module For ultra-high precision demands, RYK provides linear motor driven modules. Featuring gapless direct drive,

its repositioning accuracy reaches ±0.002mm ~ ±0.005mm.

Applicable scenarios: Ultra-precision laser processing Semiconductor wafer inspection High-speed fine dispensing Precision optical alignment 07 Conclusion: Accuracy Derives from Comprehensive Strength The ±0.01mm repositioning accuracy is supported by integrated capabilities covering material research, precision machining,

component selection, assembly craftsmanship and quality management. Sticking to the core advantages of precision, stability and cost-effectiveness, RYK semi-closed ball screw modules popularize

micron-level precision solutions.

Automation manufacturers acquire reliable high-precision accessories at reasonable costs. Feel free to contact RYK technical team for professional model selection service and free 3D drawing download. Dongguan JiYi Intelligent Equipment Co., Ltd. Address: No.1 Yonghua Road, Beiyong, Daojiao Town, Dongguan City, Guangdong Province Official Website: www.ryk.net.cn All technical data sourced from official product specifications and actual measurement results.