Starrett W2900, User Manual

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12 PKG08863-UMW2900
FUNCTIONS
2.2 Setting the MIN/MAX/TIR Function
The Min/Max/TIR (Total Indicator Reading or Run-out ) function
measures the minimum and the maximum values of a surface (usually
rotating) and then calculates the difference between them. (TIR),
Note: This function is only available with the advanced type indicators.
1. Select the units to be displayed.
2. Bring the indicator down to the part being measured, to a point
that is around half the travel of the indicator.
3. Lock in the indicator at this height.
Note: Care must be taken; to make sure the difference between the
high and low measurements are not outside of
the travel of the indicator as setup. Either your low measurement will
be wrong or your high measurement might jam the spindle and damage
your indicator.
4. Press the MIN/MAX/TIR button. The MIN icon will appear in the
display.
5. Press the ZERO/ABS button. The tool is now ready measure the
part.
6. Move the part under the indicator to find the low spot. You will
know because the value will not change.
7. Press the MIN/MAX/TIR button. The MAX icon will appear in the
display.
8. Press the ZERO/ABS button. The tool is now ready measure the
part.
9. Move the part under the indicator to find the high spot. You will
know because the value will not change.
10. Press the MIN/MAX/TIR button. The TIR icon will appear on the
display, and the display will show the value of the TIR. If recording
this value, do not allow the spindle to move until you have sent
the information by pressing the Wireless button.