The background of Grammage (g/m²) Detection

Under the wave of digital transformation and intelligent manufacturing, production control in the textile dyeing and finishing industry is shifting from "extensive" to "refined" management. Grammage (g/m²), as the core indicator of fabric quality, directly affects product quality, customer trust, and corporate profitability through its detection methods and accuracy. Traditional detection relies on manual disc cutting and offline machine measurement, which not only wastes fabric, suffers from data lag, and low accuracy, but also leads to high defect rates and frequent rework due to the disconnect between detection and process control.

To address these industry pain points, Hongda Intelligence Technology, a national R&D center for dyeing and finishing digital systems and a pilot demonstration enterprise recognized by the Ministry of Industry and Information Technology (MIIT), has leveraged its 30+ years of expertise in intelligent textile dyeing and finishing equipment to develop a groundbreaking solution — the world's first HV-GM200 Intelligent Online Weight Scale. This innovation marks a new era in fabric weight detection, moving into real-time online, fully closed-loop automatic control!

1. Why are traditional grammage detection methods in urgent need of replacement?

Destructive testing – Manual disc cutting removes an entire piece of fabric, leading to direct material loss and a sharp increase in annual production costs.

Post-hoc remediation – Offline detection suffers from serious time lags. Once a batch is found to be non-compliant, the entire batch of fabric from that process run has already become waste.

Experience-dependent data – Variations in operators and equipment introduce deviations, resulting in unstable grammage readings, which in turn undermines subsequent quality control and delivery consistency.

Detection ≠ regulation – Even when problems are identified, process parameters cannot be adjusted in real time. Process control still relies on “manual judgment + manual adjustment.”

2. HawkVision HV-GM200 Intelligent Online Weight Scale – World’s First “Real-Time Online, Closed-Loop Control” System for Fabric Weight

The HV-GM200 Intelligent Online Weight Scale adopts a high-precision micro-gravity measuring technology constructed from advanced aerospace materials, enabling online measurement of fabric weight during continuous operation. The system is installed at the exit end of the stenter frame, providing 7×24 hour online grammage monitoring, truly transforming grammage detection from “post-process sampling inspection” to “continuous online measurement during the process”.

World’s first technology delivering real-time, non-destructive, millimeter-level precision

• Detection range: 80–1000 g/m², accuracy: ±1%, response speed faster than 50 milliseconds – data is presented in real time on the terminal dashboard.
• Non-contact, zero consumption. The fabric no longer needs to be cut and discarded after inspection, achieving true zero material loss. 

Full closed-loop control via integrated pick counting system – “adjust while measuring”

This is the biggest highlight of the solution! 

The HV-GM200 is not just a single detection device, but a system-level quality intervention platform. By connecting with Hongda Intelligence’s self-developed Hawk Vision® density detection + overfeed control system, the measured data is transmitted in real time to the overfeed actuator. The system automatically determines deviations in grammage from the target process parameters, and independently and rapidly adjusts key process variables such as overfeed, machine speed, and fabric stretching.

From now on: As soon as a grammage anomaly occurs, the system automatically corrects it – no manual intervention required, completely replacing manual judgment and manual control.

3. What practical problems can this intelligent online grammage meter solve for you?

✅ Eliminate fabric loss – Say goodbye to destructive disc sampling and achieve zero fabric waste in production.

✅ Soar first-pass quality success rate – Real-time monitoring + system integration drastically reduce process instability risks, with product consistency exceeding 99%.

✅ Significantly lower rework rate – Verified by multiple customer factories: using this system reduces returns and reworks caused by grammage issues by over 90%.

✅ Achieve full data visibility and traceability – Complete grammage data is collected, recorded, and automatically generated into quality reports with one-click export, helping enterprises improve quality, reduce carbon footprint, and control costs.

01 Detection range 80–1000 g/m²

02 Detection accuracy    ≤±1%

03 Response speed ≤ 50 milliseconds

04 Compatible machine speed        0–100 m/min

05 Environmental tolerance   Up to 60°C, relative humidity ≤ 90% RH

06 Compatible fabrics     Cotton, linen, chemical fiber, knitted, woven, and various blended fabrics

07 Control method Integrated with HawkVision® system, automatically adjusting overfeed, machine speed, and other process parameters

08 Detection accuracy: withstands high temperature and high humidity – up to 60°C, relative humidity ≤ 90% RH

09 Response speed ≤ 50 milliseconds

Proven in leading dyeing and finishing projects: hardcore technology, even harder benefits

The HV-GM200 has been successfully deployed on the production lines of many industry-leading enterprises and “future factories.” Customer feedback confirms that the system is not only technologically advanced, stable in operation, and easy to install and commission, but also delivers tangible cost and profit optimization through “zero fabric waste, sharp reduction in rework rates, and direct drop in defect rates.”

The product is currently in use and highly praised by major dyeing and finishing leaders including Zhejiang Shengtai, Yingfeng , Wujiang Xinda Printing & Dyeing, Zhejiang Shengshan Dyeing & Finishing, and Wuxi Hengtian Printing & Dyeing. The device has been granted multiple national invention patents and is listed in the China Dyeing and Finishing Industry Recommended Catalog of Advanced Energy-Saving and Emission-Reduction Technologies, providing a strong, hardcore guarantee for the high-quality development of China’s textile dyeing and finishing industry.

Transform your production line from a passive grammage detector into an active precision controller for every production run!

4. Hongda Intelligence’s Spirit of Innovation: Empowering the Industry Without Limits

With over 30 years of deep understanding of the textile dyeing and finishing industry, from visual inspection to intelligent control systems, the Online Weight Scale  is one of the “product quality control brains” that Hongda Intelligence has built for the industry. It represents a brand-new leap from “manual sampling inspection” to “data-driven precision regulation,” and stands as a landmark achievement in the refinement and intelligent upgrading of dyeing and finishing production.

Changzhou Hongda Intelligence Technology Co., Ltd. will continue to deepen its presence in the field of intelligent textile manufacturing, steadily increase R&D investment, and drive technological innovation and results commercialization. With more advanced technologies and higher-quality products, the company is committed to serving textile enterprises worldwide, helping the industry achieve higher-quality development in the wave of digital and intelligent transformation, and contributing even more to the rise of China’s intelligent manufacturing sector.