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7.5 Groove bottom pickup
The groove bottom pickup is close to the standard pickup, but the depth increases. It can measure the roughness
of the most flat, slope, conical surfaces, inner holes, grooves and other surfaces. Handheld measurement is not
available. Except for standard pickups, the measuring platform is required for other pickups.
7.5.1 Size
7.5.2 Operating instructions
1) Insert the groove bottom pickup carefully into the instrument, and then mount it on the column connectors.
Lock reliably;
2) Adjust the column carriage slightly higher. Lower it until the pickup contacts the workpiece. Be careful,
especially as the pickup contacts with the workpiece.
3) Adjust the body of pickup level and check visually. Check whether the stylus position is near the center.
4) Lift the pickup in proper direction. Wrong direction will cause damage to the pickup.
7.5.3 Calibration
1) Measure the multi-line calibration specimen;
2) Read the Ra value;
3) Compare it with the specimen.
7.5.4 Precautions
1) Be careful to plug the pickup. Do not touch the guide and the stylus, which are key parts of the instrument.
Try to hold the base of the pickup guide bracket (front body);
2) After operating the pickup, place it in the package.
7.6 Small bore pickup
The small bore pickup is used for measuring the roughness of surface of inner holes with 2.5mm diameter or
larger. The other uses are the same as standard pickups.
