HEIDENHAIN
Working with the digital readouts |
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ND 510 |
ND 550 |
Actual value and input display
(7-segment LED,
8 decades and sign) Downwards: X-axis, Y-axis, ND 550 only: Z-axis
•Select coordinate axis
(Z-axis with ND 550 only)
•Select axis-based operating parameters
Numeric keypad and decimal point
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X |
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8 |
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Y |
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Z |
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0 |
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CL |
SPEC |
MOD |
ENT |
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FCT |
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REF |
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2 |
in. |
SCL |
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•Sign
•Change parameter
Confirm entry values
•Call operating parameters
HEIDENHAIN
Status indicators
•Select datum
•Page backward in parameter list
• Page forward in parameter list
Datum setting function
•Clear entry
•CL plus two-digit number: select parameter
•Clear parameter entry
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Indicator |
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Meaning |
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REF |
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Reference mark was crossed over – datum points are now stored |
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in non-volatile memory. |
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Blinking: Waiting for reference mark to be crossed over. |
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in. |
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Position values displayed in inches. |
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1 / |
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2 |
Datum point 1 / Datum point 2 currently active. |
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SCL |
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Scaling factor active. |
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←Define workpiece edge as datum.
Blinking: Waiting for operator to confirm selection.
→ |
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← |
Define centerline between two workpiece edges as datum. |
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Blinking: Waiting for operator to confirm selection. |
The ND 510 and ND 550 digital readouts accept HEIDENHAIN linear encoders with sinusoidal output signals.
These linear encoders have one or more reference marks, preferably of the distancecoded type. When a reference mark is crossed over, a signal is generated which identifies that position as a reference point.
After switch-on, simply crossing over the reference mark restores the relationship between axis positions and display values last defined by datum setting.
With distance-coded reference marks, a maximum traverse of only 20 mm is sufficient to re-establish the relationship between axis positions and display values after switch-on.
Switch-On
Turn on the power
The power switch is located on the rear panel. The display shows 
and REF blinks.
Turn on reference mark evaluation
Press the ENT key.
The display shows the value last assigned to the reference mark position, the REF indicator glows and the decimal point blinks.
Cross over the reference mark in each axis
Move the axes one after the other until the display becomes active and the decimal point glows.
The display unit is now ready for operation.
If you do not wish reference mark evaluation, press CL instead of ENT.
Setting the Datum
The datum setting procedure assigns a display value to a specific axis position. Two separate datum points can be defined.
You can switch from one datum to the other |
Z |
at the touch of a key. |
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Use datum 2 if you want to display |
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incremental values. |
Y |
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Select the datum. |
X |
Select the coordinate axis |
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in which the tool moves, |
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for example the X-axis. |
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Touch the workpiece with the tool. |
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Enter the position of the tool center
with the numeric keypad, for example X = –5 [mm]. The minus sign can only be entered when at least one digit is shown in the display.
Press ENT.
The display unit stores the value for this tool position.
Follow the above procedure for other axes.
Datum Setting Functions
The special functions which your display unit is capable of allow you to define a workpiece edge or the centerline between two workpiece edges as the datum. With the SPEC FCT feature, the display unit takes into account the tool diameter you entered in operating parameter P25.
Workpiece edge as datum |
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Select the datum. |
Z |
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Press the SPEC FCT key once. |
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The indicator "Workpiece edge as datum" |
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starts blinking. |
Y |
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Press ENT. |
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The indicator glows. |
X? |
X |
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Select the coordinate axis in which the |
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tool moves. |
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The selected coordinate axis glows more brightly. |
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Touch the workpiece with the tool. |
Workpiece edge as datum |
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Press ENT. |
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The display shows the current position of the edge. |
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Enter the new coordinate value for the workpiece edge that was touched.
Press ENT.
The display unit sets the workpiece edge to the new value and displays the position of the tool center based on the new datum.
This function ends automatically.
Centerline between two workpiece edges as datum |
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Select the datum. |
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Press the SPEC FCT key twice. |
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The indicator "Centerline as datum" |
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starts blinking. |
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Press ENT. |
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The indicator glows. |
Y |
Select the coordinate axis in which the |
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tool moves. |
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The selected coordinate axis glows more brightly. |
X? |
Touch the first workpiece edge with the tool. |
X |
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Press ENT. |
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The decimal point in the display blinks. |
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Touch the second workpiece edge with the tool. |
Centerline as datum |
Press ENT.
The display shows the current position of the centerline.
Enter the new coordinate value for the centerline between the two touched workpiece edges.
Press ENT.
The display unit sets the centerline to the new value and displays the position of the tool center based on the new datum.
This function ends automatically.
Aborting the datum setting functions
To abort when the indicator for the function is blinking: Press CL.
To abort when the indicator for the function is glowing steadily: Press SPEC FCT.
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