J-FY2-1 Jolly's Balance: Reliable Integrated Solution for Industrial Precision Mechanical Measurement

Structural Design of the Jolly's Balance

The Nexisense J-FY2-1 Jolly's Balance adopts an upright precision mechanical structure. The main support is a metal rod A that can move up and down, with a conical spring K suspended on the crossbeam. The spring is designed with a conical layout with the tip upward and the bottom downward, effectively eliminating uneven elongation caused by its own weight and ensuring stable linearity across the full range. The lower end of the spring is connected to a long strip-shaped plane mirror D, which is suspended inside a glass tube E with horizontal scale lines. A small hook at the lower end is used to hang the weight pan F. The metal rod A is fitted inside a metal tube J, which is equipped with a vernier B and a movable platform C. Precise lifting and lowering of the spring is achieved by adjusting the knob G, and the lifting distance is read jointly by the main scale and the vernier. The inclination adjustment knob I ensures the levelness of the entire instrument, meeting the requirements of high-precision mechanical measurement.

This structure is suitable for long-term industrial environments. Metal parts are surface-treated to enhance corrosion resistance. The main scale has clear markings, and the vernier adopts a tenth vernier design with a division value of 0.1 mm. The reading method is consistent with a standard vernier caliper. The instrument base is equipped with leveling screws, and the top of the sleeve integrates the vernier. The internal pulley chain transmission ensures smooth movement of the steel tube.

“Three-Line Alignment” Operation Method and Measurement Principle

During use, the operator must ensure that the horizontal scale line on the plane mirror D, the horizontal scale line on the glass tube E, and the reflection image of that line in the plane mirror are completely coincident, i.e., achieving “three-line alignment”. This method locks the fixed position of the lower end of the spring, and the spring elongation ΔX is accurately obtained through the difference between the two readings of the main scale and vernier before and after, avoiding human positioning errors.

According to Hooke's law, within the elastic limit, the external force F is proportional to the elongation ΔX: F = kΔX, where k is the spring stiffness coefficient. For a specific spring, the value of k is constant. By loading with known mass weights and measuring ΔX, k can be calculated to complete instrument calibration. After calibration, only ΔX needs to be measured to inversely deduce the acting force F. This principle is widely used in engineering scenarios that require high repeatability of mechanical data. The measurement resolution reaches 0.1 mm, and combined with estimation reading, higher precision can be achieved.

Instrument Performance Parameters and Calibration Procedure

The Nexisense J-FY2-1 is equipped with a vernier of 0.1 mm division value. The three springs have maximum loads of 15 g, 30 g, and 30 g respectively, meeting different range requirements. When stored in a mechanics laboratory, a dry and shock-proof environment must be maintained. The calibration steps include: level adjustment to the “three-line alignment” reference position, adding standard weights step by step, recording each ΔX value, performing linear fitting to calculate k, repeating the entire process three times and taking the average value to ensure the error is controlled within 0.5%.

Typical Application Scenarios and Project Cases

• In chemical process control, the Jolly's balance is used for liquid surface tension coefficient determination. Through the ring method or plate method, the interfacial tension is accurately quantified, and the data is directly input into the PLC system to achieve formula optimization and quality closed-loop monitoring. In a European battery manufacturing project, after integrating the Nexisense J-FY2-1, the surface tension control accuracy of the electrolyte was improved, and product consistency improved significantly.

• In the field of materials research and development, the instrument measures the relationship between load and spring elongation to verify the elastic properties of new alloys or composite materials, supporting linked testing between R&D laboratories and production lines. A smart manufacturing enterprise integrated it into the BMS system to monitor weight changes of micro-components in real time, ensuring assembly accuracy.

• For object specific gravity determination, it is suitable for rapid verification of solid or liquid density, especially in pharmaceutical and environmental monitoring projects. Combined with a temperature compensation module, it outputs standardized data. Micro-object weight measurement serves precision electronic assembly lines to detect milligram-level component quality deviations and reduce the defect rate.

These scenarios all demonstrate the good compatibility of the instrument with industrial automation systems. Data remote collection and analysis can be achieved through simple expansion.

Selection Guide

When selecting, first evaluate the maximum load of the project: the 15 g spring is suitable for micro-mass or surface tension precision testing, while the 30 g spring is suitable for conventional loads and specific gravity determination. Consider the measurement environment: if vibration exists, it is recommended to add a damping platform; if high temperature or corrosive media are involved, customize an acid- and alkali-resistant coating version. The vernier accuracy of 0.1 mm already meets most engineering needs. For batch projects, 0.05 mm extended reading can be further requested. The final selection should be combined with the actual ΔX range to ensure that the k value falls within the instrument's linear range and avoid overload affecting measurement reliability.

Integration Notes

• During installation, first adjust the instrument to level using the inclination adjustment knob I, and confirm that “three-line alignment” is stable before measurement.

• When integrating into an automation system, it is recommended to add an optical sensor or CCD module to automatically capture the scale line position. The output signal is transmitted to the host computer via RS485 or Modbus RTU protocol to achieve automatic data recording and alarm.

• Avoid strong magnetic fields and severe vibration environments. Regularly check the spring linearity. It is recommended to calibrate once per quarter.

• Electrical connections should use shielded cables to ensure signal integrity.

OEM Customization and Bulk Supply Services

Nexisense provides complete OEM/ODM services. We can customize the spring stiffness coefficient range, vernier scale, metal material, and protection level according to customer drawings, and support integration of NB-IoT or 4G wireless modules for remote monitoring. Bulk supply starts from 10 units with a short delivery cycle, including complete technical documents, installation guidance, and after-sales training. Customized versions can match specific communication protocols or external dimensions to help integrators quickly implement projects.

FAQ

Q1. How does the vernier accuracy of the Nexisense J-FY2-1 Jolly's Balance ensure long-term measurement reliability?
The tenth vernier has a division value of 0.1 mm. Combined with the main scale reading, it can achieve an estimation reading accuracy of 0.01 mm. The instrument is factory-calibrated with three-point linear calibration. In actual use, repeatability is better than 0.2%. Regular maintenance can maintain performance.

Q2. How to integrate the Jolly's balance into an existing PLC control system?
By adding a digital reading head, ΔX is converted into 4-20 mA or Modbus RTU signals, which are directly connected to the PLC analog or communication module to achieve real-time data acquisition and process control linkage.

Q3. What standard conditions are required for calibrating the spring stiffness coefficient k value?
At a standard temperature of 20°C, use a set of metrologically certified weights, load step by step and record ΔX values, perform linear fitting to calculate k, repeat three times and take the average value, with the error controlled within 0.5%.

Q4. What communication protocol extensions does the instrument support?
The standard version reserves an RS485 interface and can be extended with Modbus RTU, Modbus TCP, or Profibus protocols to meet integration requirements of different DCS or SCADA systems.

Q5. What is the impact on the instrument if the maximum load is exceeded?
Exceeding the 15 g or 30 g load will cause the spring to enter the nonlinear region, leading to changes in the k value. It is recommended to strictly control within the rated range to avoid permanent deformation affecting subsequent measurements.

Q6. What is the operation procedure for liquid surface tension coefficient determination?
Adjust to the “three-line alignment” reference, hang the measuring ring and immerse it in the liquid to be tested, slowly lift and read the stable ΔX, substitute into the surface tension formula to calculate σ, take multiple measurements and average them, and record temperature compensation.

Q7. What is the minimum order quantity and delivery cycle for bulk purchase?
The minimum order quantity is 10 units. The delivery cycle for standard configuration is 15 working days, and for customized versions it is 25 working days, including packaging, inspection report, and transportation support.

Q8. How to obtain technical support and customized solution quotations?
Submit project parameters through official channels. The engineering team will provide detailed specification sheets, prototype test reports, and integration solution suggestions. The quotation includes bulk discounts and after-sales service terms.

Summary

The Nexisense J-FY2-1 Jolly's Balance has become a stable choice for industrial mechanical measurement projects with its precision structure, reliable principle, and flexible integration capabilities. Its applications in surface tension, elastic coefficient, and micro-mass determination have helped many enterprises improve process control accuracy and product quality consistency. For integrators and laboratory purchasers, we continue to optimize customization services to help projects land efficiently. If you need a technical specification sheet, prototype evaluation, or bulk solution discussion, please contact the Nexisense engineering team to jointly develop a measurement solution suitable for your system.