Re-Qualify Example

Developing a Part Program to perform Re-Qualifications

Command Activation

An inspection program can be developed that will perform the Re-Qualification as a series of steps. This allows the updating of the stylus values under program control.

Should you have a DCC style CMM, the Re-Qualification program can be written with motion attached which will then allow complete Re-Qualification to take place without the need to move the CMM manually. If the CMM is a manual style, then the operator would be prompted between stylus changes to switch to the next stylus and capture the data points on the reference sphere.

Step 1:

Through the Stylus Manager, set active the stylus to be Re-Qualified, see Choosing a Stylus.

Step 2:

Activate the Re-Qualification command <ctrl + w>. Geomet will prompt you to capture the required number of data points as well as a message prompt "Re-Qual Stylus (Ball)".

Step 3:

Capture the data points required. When completed, Geomet will update the stylus database with the new size and MCS location values. An entry is made in the inspection report that refers to the Re-Qualification and report the change in values.

Summary:

Through the Stylus Manager, select the next stylus to be Re-Qualified and repeat steps 1-3 until all stylus Re-Qualifications are completed. Save this as a part program to be rerun at any time.

This procedure is similar to the required steps in manual Re-Qualification, see above. The inclusion of teaching a motion path with each step will allow Geomet to drive the CMM through the steps required, See Motion Control.

When the complete Re-Qualification is completed, save the part program which can be executed under DCC control to Re-Qualify or rebuild the current stylus database under program control.

NOTE: To make a Re-Qualification program that can operate under complete motion control, start by utilizing a Fixture Coordinate System that shares the origin with the reference sphere. The example below will demonstrate the steps required to:

1) Build the FCS on the reference sphere.

2) Build the steps for a Re-Qualification program.

Step 1

Start a new part program and select stylus tip number 1 active.

Step 2

Establish a Part Coordinate System using the MCS. Use the ICS→PCS command.

Step 3

Measure an OD Sphere on the reference sphere.

Step 4

Establish a new XYZ Origin on the sphere center.

Step 5

Activate the FCS Manager <shift + L>, see FCS Manager.

Step 6

Add a comment to describe the FCS purpose and <Append> the new FCS.

When this FCS has been added to the FCS database, it now becomes available to be recalled as a PCS. The actual Re-Qualification program will then use this FCS as the basis for the motion. Should the reference sphere have to move, Perform the steps listed above and in place of Step 6, you would <Update> the existing FCS. This allows the motion belonging to the Re-Qualification to move with the reference sphere.

Once the FCS has been created and added to the FCS database, you can now start to build the complete Re-Qualification program.

Step 1

Start a new part program and select stylus tip number 1 active.

Step 2

Recall the FCS associated with the reference sphere, see recalling an FCS.

Step 3

Activate the Re-Qualification command <ctrl + w>. Geomet will prompt you to capture the required number of data points as well as a message prompt "Re-Qual Stylus (Ball)".

Step 4

Capture the data points required. Insert proper IPs to build a complete motion path. When completed, Geomet will update the stylus database with the new size and MCS location values. An entry is made in the inspection report that refers to the Re-Qualification and report the change in values. If you choose to track the size and location changes, you can establish SPC tags on the results to export them to a file for use with many SPC programs.

Step 5:

Choose the next Stylus in the database and repeat steps 3 and 4 until all stylus in the active database have been Re-Qualified. Save the part program and executed as needed.

Step 6:

Save this part program for later use.

Related Procedures:

Stylus Manager, Creating Motion Paths, FCS Recall, Qualifying a Stylus, Re-Qualify a Stylus, Labeling a Stylus, Deleting a Stylus, Stylus db Manager, Ring Gage Re-Qualifying, Choosing a Stylus, Measuring with Multiple Styli