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Single Axis Rotary MRZP Setup

2.10 Single Axis MRZP

Last updated: 04/26/2022

Single Axis Rotary MRZP Setup

Introduction

The Machine Rotary Zero Point (MRZP) Offsets are control settings that define the centers of rotation for the rotary table relative to the home positions of the linear axes. This program can be used to obtain MRZP values for any rotary axis, A, B or C.

Required parts

Machine Requirements

  • Software 100.20.000.1200 or higher

Note: The tool shown in pictures in the the NCG is no longer being sold by Haas. 

Probe Cycle Instructions

1

This procedure requires that the spindle probe be calibrated and that the rotary be square to the machine's movement. Verify both of these before continuing.

Warning: The face of the rotary needs to be square to the machine motion within 0.002 inch (0.05 mm). An alarm will be generated if the rotary is not square within this tolerance. 

The steps to calibrate a probe can be found at Wireless Probing How-To PART 1 - Calibrating the System.

 

2

If necessary assemble the calibration tool and mount it to the rotary.

Mag base: The pervious MRZP tool used a mag base to attach to the rotary face. Place it anywhere on the rotary where it will not crash into any thing as it moves around. 

T-slots: See the details tab on the product page for information on how to configure the MRZP tool. Bolt down the MRZP tool using the T bolts. The tool does not need to be centered. 

IMPORTANT: Make sure the gauge ball will stay within the XYZ travel limits when attempting to run the probing cycle at different angles in rotation. 

3

Press [Offset] then navigate to the Work tab and set G154 P80, P81 & P82 to zero in all axis. These will be used to store data collected during the test. 

Also check that setting 254 and macro variable 10800 is set to zero. 

Press settings then type 254 and press [F1] to search for the setting. Set it to zero. 

Press [Current Commands] and open the Macro Vars tab. Navigate to the right to the (Global) 10800 - 10999 section. Highlight the Var 10800 and set its value to zero. 

4

Place the spindle probe in the spindle.

The spindle probe must be calibrated before the probing cycle is started. If it has not been calibrated do so before continuing. 

The steps to calibrate a probe can be found at Wireless Probing How-To PART 1 - Calibrating the System.

5

Position the spindle probe over the gauge ball. The probe stylus must be positioned near centerline of the calibration ball, and about 1/4 inch (6.35 mm) above the top surface. 

Important: It is important that the be as close to 1/4 inch above the part as possible. If it is too low it may hit the stem and generate alarm 1092 (UNEXPECTED SUREFACE FOUND). If the probe is to high that will reduce the accuracy of the of the procedure. 

If the probe is too far off center in the ball or is too low or too high you will get the alarm 1092 (UNEXPECTED SUREFACE FOUND). Clear the alarm and move the probe closer to the center axis of the ball and to the correct height above the ball. 

Tip: Place your thumb and index finger on horizontal axis of the gauge ball. Move your fingers up together to the top of the ball. Once they get to the top and are gently pinching the ruby tip of the probe. You should be able to feel if the ruby tip is centered. 

Warning: Do not pinch the probe too hard as this can damage the probe. Additionally, the probe should not move while it is being handled as this can also damage the probe. 

6

Press [EDIT] then navigate to the VPS tab.

Then highlight PROBING directory and press right arrow.

7

Highlight the CALIBRATION directory and press the right arrow button.

8

Highlight the MRZP Calibration directory and then press the right arrow button.

9

Highlight A, B, or C Single Axis Rough and Finish MRZP Set directory and press [ENTER].

10

Highlight the row with Variable B and Input your gauge ball diameter into the template and press [ENTER]. 

93-2880 has a 1.0 inch diameter ball. It is necessary to include the decimal place when entering the diameter. 

11

Highlight the operation Step_1. 

On the top right hand corner of the screen you will see your next options.

If you press [CYCLE START] the program will automatically be output into MDI and the program will begin its first cycle. If you choose [F4] the following choices will pop up. Once you have made your output decision run the program.

12

When the first cycle is complete the screen will revert back to what was output into MDI and repeatedly beep. Press [ENTER] to stop the beeping. 

13

Use handle jog to move the probe out of the way then rotate the axis. It does not matter how much the axis is move, however it is recommended to turn the rotary at about a third the max travel range or a third of a rotation. Once the rotary is in its new orientation jog probe over the gauge ball.

Once the probe is in place press [EDIT]. This should direct to the VPS menu you were previously in. If so then run Step_2. If not then follow steps 5 through 8 to get back to the MRZP calibration menu and run Step_2.  

When the second cycle is complete the screen will revert back to what was output into MDI and repeatedly beep. Press [ENTER] to stop the beeping. 

14

Use handle jog to move the probe out of the way then rotate the axis. It does not matter how much the axis is move, however it is recommended to turn the rotary at about a third the max travel range or a third of a rotation. Once the rotary is in its new orientation jog probe over the gauge ball.

Once the probe is in place press [EDIT]. This should direct to the VPS menu you were previously in. If so then run Step_3. If not then follow steps 5 through 8 to get back to the MRZP calibration menu and run Step_3.  

Once the final cycle is complete the screen will revert back to what was output into MDI and repeatedly beep. Press [ENTER] to stop the beeping. 

Verification

Once the third step has been completed the all the MRZP values have been set. 

Your MRZP values will be output to these variables below. In a two axis set up 4 of these would be populated and the other two would be zero. In a single axis only two of these setting will be populated and the other four would be zero. The values will either be in the master or slave section depending on how the rotary is set up. 

In the set up shown to the left you would get a Y and Z offset while X will be zero because axis of rotation is pointed in the X direction. 

  • MACRO #10300 IS SETTING 300 - MRZP X OFFSET MASTER
  • MACRO #10301 IS SETTING 301 - MRZP Y OFFSET MASTER
  • MACRO #10302 IS SETTING 302 - MRZP Z OFFSET MASTER
  • MACRO #10304 IS SETTING 303 - MRZP X OFFSET SLAVE
  • MACRO #10304 IS SETTING 304 - MRZP Y OFFSET SLAVE
  • MACRO #10305 IS SETTING 305 - MRZP Z OFFSET SLAVE

Note: These variables will not be deleted when a new probing cycle is started. They will be over written if another probing cycle calls to write these macro variables.

Run a test part to verify that the MRZP settings have been implemented correctly.