The following is a specialized technical article about the Sanfeng roughness tester SJ410,
Focusing on its core technical parameters, characteristic functions, and application maintenance, and adapting to the technical reference needs of industrial measurement scenarios:

As a portable high-precision surface roughness measuring instrument, the Sanfeng SJ410 series relies on core technologies such as dual measurement mode and high-resolution detection,
Balancing the needs of laboratory precision analysis and workshop on-site testing, it is widely used in manufacturing fields such as precision machinery and mold manufacturing.
The following provides a detailed explanation from four aspects: core technology, featured functions, application scenarios, and maintenance points.

1. Core technical parameters:
This series includes two models: SJ-411 (25mm stroke) and SJ-412 (50mm stroke).
The detector adopts a differential inductance design, with a measurement range of 800 μ m and a resolution of 0.000125 μ m at a range of 8 μ m. It is equipped with a diamond measuring needle (60 °/2 μ mR or 90 °/5 μ mR),
Can capture the subtle irregularities of ultra precision surfaces. The straightness of the driving part reaches 0.3 μ m/25mm (SJ-411) and 0.5 μ m/50mm (SJ-412) respectively, and the measurement speed can be adjusted between 0.05-1.0mm/s,
Return speed of 5mm/s to ensure measurement efficiency and stability. The whole machine is equipped with nickel hydrogen rechargeable batteries, which can support about 1000 measurements after 4 hours of charging, meeting the on-site operation needs without external power supply.

2. Core featured functions:
Firstly, the dual measurement mode is suitable for complex working conditions. Support switching between track and trackless measurements, with track mode tracking large fluctuations in the workpiece through a guide head, suitable for conventional planar measurements;
The trackless mode is based on the guide rail and can measure waviness and fine step differences. With the R-surface compensation function, it can complete the roughness evaluation of complex surfaces such as spherical and cylindrical surfaces.
Secondly, integrated analysis and intelligent operation. Equipped with a 5.7-inch backlit color touch screen, supporting 16 languages, beginners can achieve one click measurement through an automatic adjustment device;
One measurement can apply two sets of evaluation condition calculations, and can also complete four types of subtle contour analysis, including step difference and area.
Thirdly, flexible data management. The built-in memory can store 10 sets of measurement conditions, and with the option of a memory card, it can be expanded to 500 sets of conditions and 10000 measurement contours,
Supports exporting data through USB and RS-232C interfaces, with optional wireless tools for fast data transfer.

3. Typical application scenarios:
In the field of research and development, surface parameter detection for ultra smooth materials such as graphene coatings and precision optical components can accurately capture fine roughness data;
At the production site, it can handle the sampling inspection of complex workpieces such as mold cavities and deep groove parts. The trackless measurement function can efficiently detect the circumferential roughness of cylindrical parts;
In the quality inspection process, it complies with 46 parameters of multiple international standards such as ISO and DIN, and can generate graphical reports to meet the compliance quality inspection requirements of automotive parts and electronic components.

4. Key maintenance points:
After daily use, use an alcohol cotton ball to gently wipe the measuring needle to remove oil stains, and use a diluted neutral cleaner to wipe off body stains;
Add specialized lubricating oil to the Z2 axis column guide surface every month, and perform professional lubrication on the X-axis guide every 2000 hours.
Every three months, use standard sample blocks to calibrate the instrument. If the measuring needle wears out, it should be replaced in a timely manner; When idle for a long time, desiccants should be placed and regularly powered on. When handling, use a dedicated shock box to avoid damage to internal components.