Probe-Vision Offset Calibration

Easson2D supports both vision measurement and probe measurement. Because the probe and the main measurement camera are located at different physical positions on the machine, probe-vision offset calibration is required before using the two measurement methods together.

During calibration, the same standard circular gauge is measured with both vision measurement and the probe, allowing the software to establish the correct positional relationship between the two measurement methods.

1. Place a Standard Circular Gauge

Place a standard circular gauge suitable for both vision and probe measurement on the worktable.

Do not move the standard gauge during calibration, so that the vision measurement and probe measurement target the same actual circular feature.

2. Measure the Standard Circle with Vision

First, measure the standard circular gauge using Easson2D's vision measurement function.

After the measurement is complete, the software generates a circle element.

Note the number of this circle element, since you will need to enter it during probe calibration.

For example:

Circle 1

Then enter the corresponding circle element number 1 when performing probe calibration later.

3. Open the Probe Settings

Click:

Probe Measurement → Probe Settings

to open the probe-related settings.

Then click:

Calibrate Probe-Vision Offset

to enter the probe-vision offset calibration state.

4. Measure the Same Standard Circle with the Probe

Move the probe to the same standard circular gauge that was just measured with vision measurement.

Probe points along the circular profile, requiring:

At least 4 measurement points

It is recommended to distribute the measurement points at different positions around the circumference, rather than concentrating them in a small arc.

What matters is that:

The vision measurement and the probe points must target the same standard circular feature.

5. End Probing with a Right Click

After acquiring at least 4 probe measurement points, right-click:

in the image area or the geometry area

to end the current probe point acquisition.

Easson2D then displays an input window asking you to enter the number of the circle element obtained from the vision measurement.

6. Enter the Vision Circle Number

Enter the number of the circle element generated by the vision measurement in step 2.

For example, if the vision measurement produced:

Circle 1

enter:

1

Then click OK.

Easson2D calibrates based on the circle position from the vision measurement and the circle position from the probe measurement.

After calibration, the software displays a calibration successful message.

Basic Workflow

Probe-vision offset calibration can be summarized as:

Place a standard circular gauge → Measure the standard circle with vision → Note the generated circle element number → Probe Measurement → Probe Settings → Calibrate Probe-Vision Offset → Take at least 4 points on the same standard circle → Right-click in the image area or geometry area to finish → Enter the previous vision circle number → Click OK → Calibration successful message appears

Calibration Notes

When calibrating, note that:

• Vision measurement and probe measurement must use the same circular feature
• Do not move the standard circular gauge after completing the vision measurement
• Take at least 4 valid probe measurement points
• Distribute the probe points at different positions around the circumference
• The element number entered must be the circle element number obtained from the vision measurement

If you enter the wrong circle element number, or if the vision measurement and the probe measurement do not target the same standard circle, perform the calibration again.

Difference from Reference Probe Diameter Calibration

Reference probe diameter calibration mainly adjusts the size compensation of the probe ball, so that dimensions measured with the probe match the standard dimensions.

Probe-vision offset calibration, on the other hand, calibrates the positional relationship between probe measurement and vision measurement.

Therefore, on machines that need to use both vision and probe for measurement, these two calibrations serve different purposes and should not be substituted for each other.