User's Manual ND 281, NDP 281 - heidenhain - DR. JOHANNES ...

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Datum Setting 8 Datum Setting The datum setting procedure assigns a display value to a known position. With the <strong>ND</strong> 200 series, you can set two separate datum points. There are several ways to set the datum: Enter a numerical value, or Transfer a value from an operating parameter (see P79, P80), or By external signal 5 Select datum 1 or 2. Enter numerical value (here, 5). Confirm the entered numerical value. You can switch between datums 1 and 2 as desired. Datum 2 can be used, for example, for working with incremental dimensions. When you switch back to datum 1, the display unit resumes display of the MT's actual position. Z ? ? ? ? ? Without datum setting: unknown assignment of measured values to positions Z 20˜ 15˜ 10˜ 5˜ 0 After datum setting: Assignment of measured values to positions
Finding Minimum and Maximum Values From a Series of Measurements After a series of measurements has been started, the display transfers the first measured value to the memory for minimum and maximum values. Every 0.55 ms, the display compares the current measured value with the memory contents: A new value is stored if it is greater than the stored maximum value or smaller than the stored minimum value. At the same time, the display calculates and stores the difference DIFF between the current MIN and MAX values. Display Meaning MIN Minimum value from the series of measurements MAX Maximum value from the series of measurements DIFF Difference MAX – MIN ACTL Current measured value Starting the series of measurements and selecting the display You can start the series of measurements either by pressing MOD and selecting the desired display — as described on the following pages — or by external signal over the switching inputs at the D-sub connection EXT (X41, see page 34). When a series of measurements is started, the internal MIN/ MAX/DIFF memory is reset. ACTL Series of measurements: The MIN, MAX and DIFF values of an uneven surface r MIN r MAX e 2e = r MAX Ð r MIN e = DIFF 2 MAX DIFF MIN Example: Series of measurements for determining eccentricity e Finding Minimum and Maximum Values 9
Page 1 and 2: User's Manual ND 281 NDP 281 Measur
Page 3 and 4: Key Function Set datum Transfer inp
Page 5 and 6: Contents Working with the ND Displa
Page 7: Switch-On, Crossing Over the Refere
Page 11 and 12: Starting a new series of measuremen
Page 13 and 14: Measured Value Output For technical
Page 15 and 16: Error Messages Display Problem Last
Page 17 and 18: Rear Panel Connections X1, X31 and
Page 19 and 20: Power Connection Electric shock dan
Page 21 and 22: Code number for changing protected
Page 23 and 24: Parameter Settings / Function Linea
Page 25 and 26: Linear Encoders The ND 281 and NDP
Page 27 and 28: Parameter settings for HEIDNHAIN li
Page 29 and 30: Parameter settings for HEIDENHAIN l
Page 31 and 32: Pin layout RS-232-C/V.24 (X31) Pin
Page 33 and 34: Measured value output after signal
Page 35 and 36: Switching Inputs and Outputs EXT (X
Page 37 and 38: Setting and zero resetting the disp
Page 39 and 40: Switching signal for errors The dis
Page 41 and 42: Specifications Housing ND 281 Bench
Page 43 and 44: NDP 281: Dimensions in mm/inches 11

User's Manual ND 281, NDP 281 - heidenhain - DR. JOHANNES ...

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