Suzhou Lefeng Precision Instrument Co., Ltd(German Japanese Maintenance Department)We are a professional service center specializing in measuring tools and instruments for brands such as Sanfeng in Japan and Mal in Germany. The company has strong technical strength, with multiple engineers from the world's largest measuring tool manufacturing enterprises. The accessories are imported with original packaging, and the measuring laboratory instruments are all imported measuring instruments to solve the problem of poor accuracy after maintenance for customers. The quality service is supported by the metrological quality inspection department, which issues relevant maintenance product inspection reports, and has established a long-term stable cooperative relationship with the general agent of "Mitutoyo" and "Mahr". It is one of the most professional measuring instrument maintenance service providers in mainland China.
Professional maintenance: caliperheight gaugeDial gauge, dial indicatormicrometerInternal and external diameter gauges, thickness gauges, roughness meters, 2D height gauges, tool microscopes, etc.
Service commitment: Provide free on-site pickup, free fault detection, and within 2 days of quick repair service
Quality assurance: The accuracy of the repaired products meets the national precision standards
Warranty period: Non human damage, 3-month warranty for similar faults

Repair and maintenance of Sanfeng micrometer in JapanThe main problem observed is inaccurate zero position, and there are two ways to eliminate it.

1. Rotate the "differential cylinder" to the zero position (i.e. the zero line engraved on the differential cylinder coincides with the longitudinal engraved line on the fixed sleeve), and at this time, the "pointer" should rotate perpendicular to the center line of the "movable anvil" and coincide with the zero engraved line on the dial. If it does not coincide, use a screwdriver to rotate the "zero adjustment structure" and rotate the dial zero to coincide.

2. Adjusting the zero position of the "differential cylinder" can be done using the method of adjusting the outer diameter micrometer.

There are three precautions to be taken.
1. The rotation range of the zero mark on the dial is within plus or minus 10 grid marks perpendicular to the centerline of the active anvil. If it exceeds this range, the stability of the indicator is considered to be "out of tolerance".

2. Adjustment method used for "comparative measurement". Namely: Rotate the "differential cylinder" to the "nominal size" of the measured workpiece, and tighten the "locking torque". Place the "gauge block group" (nominal size) between two measuring surfaces, press the "button" a few times, and when the pointer coincides with the zero mark line and stabilizes, the measurement can be carried out.

3. During the measurement process, it is important to regularly check the accuracy of the "zero position". If any errors are found, they should be promptly readjusted.