Service Home How To Procedures UMC-750P - MRZP Offsets Settings - NGC
Last updated: 02/23/2021

UMC-750P - MRZP Offsets Settings - NGC

UMC-750P - MRZP Offsets Settings - NGC

9.3 UMC-750P - MRZP WIPS OFFSETS SETTINGS

Prerequisites

1

The probing system needs to be calibrated before performing this procedure.

Macro variables #10300; #10301; #10302; #10303; #10304; #10305 should be set to zero.

Work offsets G154 P80 / G154 P81 / G154 P82 are used to store the probing information, make sure they are cleared before starting the process.

TCPC / DWO needs to be enabled.

Setup the artifact as shown in the picture. For B axis [1] and A axis [2].

Recommended probing position are:

  • For the B axis: B-20°, B 0°, B+20°.
  • For the A axis: A 0°, A+90° A+180°

 

Perform the following steps for each rotary axis. In the event of alarm during the process refer to the Troubleshooting section at the end of the document.

UMC-750P - Single Axis MRZP Set

1

Setup the artifact.

Place the spindle probe in the spindle.

Install the Calibration Sphere Assembly onto the platter. Refer to prerequisites for the location.

Note: You will probe the sphere 3 times with the rotary at 3 different positions. Make sure that the Sphere will stay within XYZ tarvel limits when attempting to run the probing cycle at different angles.

Jog the rotary axis in the position for the first cycle

Jog X and Y axis to align the probe tip with the center of the sphere within 0.1".

Jog the Z axis to position the probe tip 0.25 away from the sphere surface.

2

Generate the program.

Press EDIT and cursor over to the VPS tab.

Navigate into MRZP Calibration folder: PROBING ➡ CALIBRATION ➡ MRZP Calibration.

Open the A, B, or C Single - Axis Rough and Finish MRZP Set template.

In the template, STEP_1, STEP_2, STEP_3 are instructions on how to run the probing cycle.

Cursor down to B and enter the Calibration Sphere diameter.

Press Cycle Start to run the pogram in MDI or F4 for more options.

3

Run the probing cycles.

Run the probing cycle with the rotary at first position

When the first cycle is done, jog the the rotary to the second position.

Jog X and Y axis to align the probe tip with the center of the sphere within 0.1".

Jog the Z axis to position the probe tip 0.25 away from the sphere surface.

Run the same program again.

When the second cycle is done, jog the rotary to the third position.

Jog X and Y axis to align the probe tip with the center of the sphere within 0.1".

Jog the Z axis to position the probe tip 0.25 away from the sphere surface.

Run the same program for the third time.

After the last probing cycle Z axis will be sent to the Home position and control will output the MRZP offsets into the macro viraibles.

4

Enter the MRZP settings.

The control will calculate and output the Rotary Zero Points for master or slave rotary into the macro variables depending on the rotary settings configuration.

You do not need to specify which axis you run the MRZP for. The control will populate the MRZP macros based on the results of the 3 probing cycles. For example: if during 3 probe cycles at diferent rotary positions Y and Z coordinates for the center of the sphere has changed and the X axis coordinate stayed within 0.002" then the rotary rotates about the X axis.

Enter the values from the macro variables into the settings as follows:

  • Macro variable #10300 represents the setting 300 MRZP X Offset Master
  • Macro variable #10302 represents the setting 302 MRZP Z Offset Master
  • Macro variable #10304 represents the setting 304 MRZP Y Offset Slave
  • Macro variable #10305 represents the setting 305 MRZP Z Offset Slave

Troubleshooting

List of the alarms that could be generated when running MRZP set.

  • SETTING 254 MUST BE SET TO ZERO FOR ACCURATE MRZP VALUES. The program checks if there is a value in the setting 254. Set the setting 254 to zero
  • PROBE IS NOT CALIBRATED / PLEASE CALIBRATE PROBE AND START PROCESS OVER. The program checks if the probe is calibrated. Calibrate the probe.
  • CALIBRATION UNIT IS TOO CLOSE THE CENTERLINE OF ROTATION PLEASE ADJUST IT AND START THE PROCESS OVER. The center of the calibration sphere is too close to the centreline of the rotary. Move the calibration sphere assembly away from the centreline of the rotary and start the process over.
  • ERROR / PLEASE INDICATE YOUR ROTARY SURFACE FLAT OR STRAIGHT WITHIN .002" / RESET YOUR TOOL CHANGE OFFSET IF NEEDED. The rotary is not squared to XYZ axes. Indicate the platter surface within 0.002"/ reset the toolchange offset for the tilting axis.
  • UNEXPECTED SURFACE FOUND. The probe tip is not aligned to the center of the calibration sphere within +/-0.1" / The probe tip is too close to the surface of the sphere. Position the probe stylus near the centreline of the calibration sphere within +/- 0.1" and 0.25" away from the surface of the sphere.
  • PROBING CYCLE IS COMPLETE / MRZP VALUES SETTING 255=#10121/ SETTING 256=#10122/ SETTING 257=#10123/ RUN THE PROGRAM AGAIN TO CLEAR MACROS AND OFFSETS USED DURING THIS PROCESS. The macro variable #10800 is not zero / work offsets G154 P80; G154 P81; G154 P82 is not zero. Reset the alarm and run the program again, in the next cycle program will clear the values.
  • MACROS AND OFFSETS HAVE BEEN CLEARED YOU MAY BEGIN TO PROBE THE NEXT AXIS. The program has cleared the values mentioned above. Reset the alarm and run the program again.