1、 Preparation before operation

1. environment check：

• temperature and humidityEnsure that the laboratory temperature is within the range of 20 ° C ± 2 ° C and the humidity meets the requirements. This is the lifeline to ensure measurement accuracy.

• vibrationCheck that there are no strong vibration sources around the equipment (such as stamping equipment, frequently opened and closed doors).

• atmospheric pressureCheck if the air source pressure meets the equipment requirements (usually 0.4-0.5 MPa) and if the air is dry and clean.

2. Equipment startup and preheating：

• Turn on the main power supply and the measuring machine power supply.

• Preheating is necessaryAfter the device is powered on, it usually needs to be preheated for 15-30 minutes (refer to the manual) to stabilize the measurement system. Before precise measurement, let the machine run empty for a period of time.

3. Workpiece preparation：

• cleanClean the workpiece thoroughly, especially the part to be tested, without any oil stains or debris.

• constant temperaturePlace the workpiece in the measurement chamber for a sufficient amount of time (usually several hours) to make it consistent with the temperature of the measurement chamber and reduce thermal expansion and contraction errors.

• clampingUse appropriate fixtures (such as magnetic gauge holders, pliers, specialized fixtures) to hold the workpieceStable and reliableFixed on the workbench. The clamping force should be moderate to avoid deformation of the workpiece.

2、 Core operation process (software side - taking Mitutoyo MCOSMOS software as an example)

The operation is mainly carried out by running measurement software on the computer (such asMCOSMOS）Come and complete it.

Step 1: Probe Calibration

This is the most important and necessary thing to do after each shift starts up!

• purposeTell the machine the accurate diameter and position of the measuring needle (ruby ball) to compensate for errors.

• process：

1. Select the "Probe Verification" function in the software.

2. Choose a standard ball (with known precise diameter and position).

3. Manually or automatically touch the standard ball with different angles and positions of the measuring needle (usually 3-5 points need to be measured for each angle).

4. The software will automatically calculate and save the compensation value for each probe angle.

Step 2: Establish a Coordinate System (Alignment/DCC Setup)

This is the soul of the measurement program.The purpose is to align the coordinate system of the machine with the coordinate system of the workpiece.
Usually divided into two steps:

1. Manual rough construction systemUse the "3-2-1" method to manually collect features and establish an initial coordinate system.

• Find the right one (3 o'clock)Measure a plane (such as the bottom surface of a workpiece) at least 3 points to determine the direction of the Z-axis and the origin.

• Rotation (2 points)Measure a straight line (such as the long side of the workpiece) at least 2 points to determine the direction of the X-axis.

• Origin (1 point)Measure a point (such as a corner) and set it as the coordinate origin (0,0,0).

2. Automatic Precision Building System(Used in the program): Based on the rough system, run the program to automatically measure these features more accurately and recalculate the coordinate system.

Step 3: Measuring Features

Measure various geometric features of the workpiece according to the drawing requirements.

• Basic geometric elementsSuch as planes, lines, circles, cylinders, cones, spheres, etc.

• measurement method：

• automatic measurementFor rule features, the software can control the machine to automatically perform scanning or dot measurement.

• manual measurementThe operator manually controls the probe to touch the workpiece for measurement using the Joystick control box.This mode requires extreme caution to prevent collisions.

Step 4: Construction&Evaluation

After measuring the basic features, perform more complex calculations and evaluations.

• construct featuresFor example, constructing a centerline through two circles, constructing a theoretical plane through several points, etc.

• Geometric tolerance evaluationAccording to the drawing requirements, evaluate the workpiece:

• dimensional toleranceWhether the diameter and length are qualified.

• Geometric toleranceAs follows:Straightness, flatness, roundness, cylindricity(Shape tolerance);Parallelism, perpendicularity, inclination, position, coaxiality, symmetry(Position tolerance).

Step 5: Output Report

Generate clear and easy to understand measurement reports.

• The report is usually presented in tabular form, including measured values, nominal values, deviations, tolerances, and judgment results (OK/NG).

• A graphical diagram can be attached to visually display the location of the error.

3、 Work after operation

1. cleanClean the workbench and measuring head.

2. return to positionMove the Z-axis to a safe height and move the measuring head to the middle position behind the workbench for future use.

3. Shut downTurn off the software and machine power in the order specified in the manual (usually first turn off the machine, then turn off the air source, and finally turn off the main power).

Core points of safe operation

1. Anti collision! Anti collision! Anti collision!This is a principle. Collisions can damage expensive probes and rails.

• When operating manually, the speed should be slow and always pay attention to the movement path of the measuring head.

• At the beginning of automatic program execution, the hand should be placed on the emergency stop button of the control box, ready to stop at any time.

2. Handle with careThe workpiece and probe are both very precise, avoiding any collisions.

3. Emergency stop button: Must be familiar withEmergency stop button on the control box and software interfacePress the button immediately in case of emergency.

summary

The process of operating three coordinates can be simplified as follows:
Start up preheating → verify probe → install workpiece → (manually) establish coordinate system → (automatically) execute measurement program → analyze data/output report → clean and shut down.

To truly learn how to operate, please make sure to:

1. Find the user manual for the Mitutoyo MCOSMOS (or other version) software corresponding to your device.

2. Apply to participate in formal training organized by Sanfeng or your company's internal expertsAnd start practicing from simple measurement tasks