Kinematic Calibration for Users
CAPPSNC Kinematic Probe Calibration
What is involved in a kinematic probe calibration?
A kinematic probe is defined as a Touch-Trigger probe requiring a physical force to trigger. This physical force for triggering can vary depending on the make and model of the probe as well as at which specific point of the ruby has encountered the object.
Because a Kinematic probe requires a physical touch force, and the amount of force can vary depending on where the probe is triggered you must calibrate the vectors of where the ruby will encounter the object. By performing a vector calibration, you can compensate for that different amount of force by determining the probes Pre-Travel amount as well as touch the specific vectors of the intended object.
How to calibrate a kinematic probe on a Master Ball with Canned CAPPSNC Routine
Inside of CAPPSNC under the Probe Ribbon is a calibrate option.
When you open the calibrate option you will be presented with a dialog box that is preconfigured from when your system was setup by AAT3D or AAT3D Partner/Distributor.
Because of the nature of a kinematic probe requiring a calibration for each vector point you will be able to update the points taken for calibration by changing the numbers in the parallels and meridians boxes.
These Parallels and Meridians represent the pattern type of points to be taken. In the example of 2 parallels with 8 meridians would generate 17 points. 16 points representing the intersection of the horizontal theoretical parallel lines with the theoretical vertical meridian lines. The first point is always the point at the top center of the Ball.
You will see the Box update with the vectors of each point to be taken. These vectors will be what is used when probing an object. *note: If the object you are measuring does not have the exact vector it will use the closest vector calibration point data. If you notice that your expected profile for example of a curved surface is less accurate than expected look at the vector of the points taken and try and increase the parallels and meridians to get vectors closer to the desired point.
Put in the program number/name and click write.
Transfer to the controller and calibrate your probe.
How to calibrate a kinematic probe on a Ring Gauge with Canned CAPPSNC Routine
Inside of CAPPSNC under the Probe Ribbon is a calibrate option.
When you open the calibrate option you will be presented with a dialog box that is preconfigured from when your system was setup by AAT3D or AAT3D Partner/Distributor.
Because of the nature of a kinematic probe requiring a calibration for each vector point you will be able to update the points taken for calibration by changing the Number of Meridians to match how many points you will take on your circle and cylinder features.
You will see the Box update with the vectors of each point to be taken. These vectors will be what is used when probing an object. *note: If the object you are measuring does not have the exact vector it will use the closest vector calibration point data. If you notice that your expected profile for example of a curved surface is less accurate than expected look at the vector of the points taken and try and increase the parallels and meridians to get vectors closer to the desired point.
Put in the program number/name and click write.
Transfer to the controller and calibrate your probe.
If you need to edit your kinematic probe build up
This section is for if you had your probe configured and commissioned by AAT3D or Partner/Distributer and now have decided that you need to update or change the stylus at the end of the probe.
Select your probe that you want to adjust by hitting select under the Probe ribbon and then selecting the probe that is being modified.
Update your probe build up by going under Probe ribbon and clicking Define.
Click Create to open the probe builder dialog.
Note the Following: Pre-Travel is pre-populated with a value from the commissioning party. This value is relative to the Units currently being used in CAPPSNC. Take note of this amount.
Remove last to update just the stylus or remove all if you changed the shank of the probe. *note: if you remove all the pre-travel information will be reset back to 0 and will need to be updated back to what you took note of in step 4.
Once you have updated your probe build up update the probe default name to what this current build up is and click OK.
Once you click OK change the probe file name to something associated with just this probe. (recommended to be the same name as probe default name you gave it)
Make sure the Probe Label up top reads the same as the Default probe name you gave it. If not edit it to the desired name and hit Apply.
You have now successfully modified your probe and are ready to calibrate with the Canned CAPPSNC Routine.
FAQ
Frequently Asked Questions about Kinematic Probe Calibrations
Why does my sphere not measure good with 25 points?
If the calibration was performed with any amount of points under 25 there is a good chance that the vector angles of some of the 25 points are not being properly compensated. Increase the amount of meridians and parallels until the 25 points vectors are closer to what is displayed in the calibration box.
How do I know if I have a good calibration?
After calibration click the view calibration data located under probe ribbon. Inside of that dialog you will see the range in the upper right corner. This range should be under .025”/.635mm
Will my ring gauge calibration take a hit on top of the ring gauge?
Yes, the ring gauge calibration will do 1 Z hit on top of the ring gauge in the direction of the first vector in the box list. This Z hit is the full diameter of the styli over from the inner ring and the Z movement is controlled by the Approach value.