HEIDENHAIN ND 520 - Manual (Page 3)

Datum Setting with an Edge Finder
The special functions of your display unit enable you to use a HEIDENHAIN KT edge
finder to set a workpiece edge or the centerline between two workpiece edges as a
datum. The position displays take into account the edge finder diameter which you
entered in operating parameter P25.
If you are using the NDP 560 (which has no edge finder input) or if you want to use
the special functions with a tool, please see the instructions on the next page.
Workpiece edge as datum
➤ Select the datum.
➤ Press the SPEC FCT key once.
The indicator "Workpiece edge as datum" blinks.
➤ Press ENT.
The indicator glows steadily.
➤ Select the coordinate axis in which the tool
moves. The selected axis glows more brightly.
➤ Probe the workpiece with the edge finder until
the LEDs in the edge finder light up and the
display shows the position of the workpiece edge.
➤ Enter the new coordinate value for the probed
edge.
➤ Press ENT.
The workpiece edge is set to the new value, and the display shows the position of
the edge finder relative to the new datum.
This function ends automatically.
Centerline between two workpiece edges as datum
➤ Select the datum.
➤ Press the SPEC FCT key twice. The indicator
"Centerline as datum" blinks.
➤ Press ENT.
The indicator glows steadily.
➤ Select the coordinate axis in which the tool
moves. The selected axis glows more brightly.
➤ Probe the workpiece with the edge finder until
the LEDs in the edge finder light up and the
decimal point blinks.
➤ Probe the second workpiece edge with the edge
finder until the LEDs in the edge finder light up
and the display shows the position of the
centerline. The decimal point glows steadily.
➤ Enter the new coordinate value for the
centerline.
➤ Press ENT.
The centerline is now set to the new value and the display shows the position of
the edge finder relative to the new datum.
This function ends automatically.
To cancel the datum setting function:
➤ When the indicator for the function is blinking: press CL
➤ When the indicator for the function is glowing steadily: press SPEC FCT
Y
X
Z
X?
Workpiece edge as datum
Y
X
Z
X?
Centerline as datum